diff --git a/.coveralls.yml b/.coveralls.yml
index ddb84f67..2fcbcc66 100644
--- a/.coveralls.yml
+++ b/.coveralls.yml
@@ -1,4 +1,4 @@
 service_name: travis-ci
 
 coverage_clover: tests/_output/coverage.xml
-json_path: tests/_output/unit.json
\ No newline at end of file
+json_path: tests/_output/unit.json
diff --git a/.gitignore b/.gitignore
index 087c1786..b26078e7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,11 @@
-/vendor
+composer.lock
+
+/tests/config/*.local.php
+
+/tests/runtime/cache/
+!/tests/runtime/cache/.gitkeep
+
 /tests/runtime/web/assets/
 !/tests/runtime/web/assets/.gitkeep
+
+/vendor
diff --git a/.travis.yml b/.travis.yml
index ba523905..dbee4ae9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,9 @@ dist: trusty
 # faster builds on new travis setup not using sudo
 sudo: false
 
+services:
+    - mysql
+
 # cache vendor dirs
 cache:
   directories:
@@ -18,13 +21,21 @@ cache:
 
 env:
   matrix:
-  - COMPOSER_OPTIONS="--prefer-lowest --prefer-stable"
-  - COMPOSER_OPTIONS=""
+      - COMPOSER_OPTIONS="--prefer-lowest --prefer-stable"
+      - COMPOSER_OPTIONS=""
+  global:
+      - DB_TEST_DSN="mysql:host=localhost;dbname=database"
+      - DB_USERNAME=travis
+      - DB_PASSWORD=
+
+before_install:
+  - mysql -e 'CREATE DATABASE IF NOT EXISTS `database`;'
 
 install:
 - travis_retry composer self-update && composer --version
 - export PATH="$HOME/.composer/vendor/bin:$PATH"
-- travis_retry composer install --prefer-dist --no-interaction
+- travis_retry composer update --prefer-dist --no-interaction $COMPOSER_OPTIONS
+- php tests/bin/yii migrate --interactive=0
 
 script:
 - sh ./phpcs.sh
diff --git a/README.md b/README.md
index 52541793..986624cd 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,13 @@ DDD Classes for Yii 2.0
 =======================
 Classes for a Domain-Driven Design inspired workflow with Yii 2.0 Framework
 
+Summary
+--------
+ - develop with DDD metodology, but you can use ActiveRecord classes
+ - decouple business logic from ActiveRecord models into an Entity class
+ - decouple database queries into a repository class
+ - encapsulate business logic for different scenarios into a dedicated form and a service class
+
 Installation
 ------------
 
@@ -21,72 +28,170 @@ to the require section of your `composer.json` file.
 Usage
 -----
 
+`TL;DR; check the tests folder for live examples`
+
 Lets see an example with a standard `App` model which is an implementation of `\yii\db\ActiveRecord` and generated via `gii`.
-I recommend to do not make any modification with this class, but make it `abstract` to prevent direct usages.
+I recommend to do not make any modification with this class.
 
-Then create a business model which extends our abstract active record class and implements `BusinessObject` interface.
+Then create an entity which extends `\albertborsos\ddd\models\AbstractEntity` class and implements `\albertborsos\ddd\interfaces\EntityInterface` interface.
 Every business logic will be implemented in this class.
 
 ```php
 <?php
 
-namespace application\domains\app\business;
+namespace application\domains\customer\entities;
 
-use application\domains\app\activerecords\AbstractApp;
-use albertborsos\ddd\interfaces\BusinessObject;
+use application\domains\customer\entities\CustomerLanguage;
 
-class App extends AbstractApp implements BusinessObject
+class Customer extends AbstractEntity
 {
-    // business logic
+    public $id;
+    public $name;
+    public $createdAt;
+    public $createdBy;
+    public $updatedAt;
+    public $updatedBy;
+
+    /** @var Language[] */
+    public $languages;
+
+    public function fields()
+    {
+        return [
+            'id',
+            'name',
+            'createdAt',
+            'createdBy',
+            'updatedAt',
+            'updatedBy',
+        ];
+    }
+
+    public function extraFields()
+    {
+        return [
+            'languages',
+        ];
+    }
+
+    /**
+     * Mapping of property keys to entity classnames.
+     *
+     * @return array
+     */
+    public function relationMapping(): array
+    {
+        return [
+            'languages' => CustomerLanguage::class,
+        ];
+    }
 }
 ```
 
+Now this class is fully decoupled from the underlying storage.
+
+For every entity you need to define a repository which handles the communication between the application and the storage.
+For `ActiveRecord` usage you can use the `AbstractActiveRecordRepository` class, which has fully functional methods and you only need to implement the following way:
+
+```php
+<?php
+
+namespace applcation\domains\customer\mysql;
+
+use albertborsos\ddd\repositories\AbstractActiveRepository;
+use albertborsos\ddd\data\ActiveEntityDataProvider;
+use application\domains\customer\interfaces\CustomerActiveRepositoryInterface;
+
+class CustomerActiveRepository extends AbstractActiveRepository implements CustomerActiveRepositoryInterface
+{
+    protected $dataModelClass = \application\domains\customer\mysql\Customer::class;
+
+    protected $entityClass = \application\domains\customer\entities\Customer::class;
+
+    /**
+     * Creates data provider instance with search query applied
+     *
+     * @param array $params
+     *
+     * @param string $formName
+     * @return ActiveEntityDataProvider
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function search($params, $formName = null): BaseDataProvider
+    {
+        // same as it would be a `CustomerQuery` instance
+        // check `tests/_support/base/domains/customer/mysql/CustomerActiveRepository.php` for a live example 
+    }
+}
+
+```
+
+Then you have to configure the DI container in the application/module configuration:
+
+```php
+return [
+
+    ...
+
+    'container' => [
+        'definitions' => [
+            \application\domains\customer\interfaces\CustomerActiveRepositoryInterface::class => \application\domains\customer\mysql\CustomerActiveRepository::class,
+            \application\domains\customer\interfaces\CustomerLanguageActiveRepositoryInterface::class => \application\domains\customer\mysql\CustomerLanguageActiveRepository::class,
+        ],
+    ],
+
+    ...
+
+];
+```
+
 #### Lets create a new record!
 
 We will need a new `FormObject` which will be responsible for the data validation.
 And we will need a `service` model, which handles the business logic with the related models too.
 
-
 A simple example for a `FormObject`:
 
 ```php
 <?php
 
-namespace application\services\app\forms;
+namespace application\services\customer\forms;
 
 use yii\base\Model;
 use albertborsos\ddd\interfaces\FormObject;
+use application\domains\customer\entities\Customer;
 
-class CreateAppForm extends Model implements FormObject
+class CreateCustomerForm extends Customer implements FormObject
 {
-    public $name;
-    public $languages;
+    public $contactLanguages;
 
     public function rules()
     {
         return [
-            [['name', 'languages'], 'required'],
-            [['languages'], 'each', 'rule' => ['in', 'range' => ['en', 'de', 'hu']]],
+            [['name'], 'trim'],
+            [['name'], 'default'],
+            [['name'], 'required'],
+            [['contactLanguages'], 'each', 'rule' => ['in', 'range' => ['en', 'de', 'hu']]],
         ];
     }
 }
 
 ```
 
-And a simple example for a `service`. Services are expecting that the values in the `FormObject` are valid values.
+Services are expecting that the values in the `FormObject` are valid values.
 That is why it is just store the values. The validation will be handled in the controller.
 
 ```php
 <?php
 
-namespace application\services\app;
+namespace application\services\customer;
 
 use albertborsos\ddd\models\AbstractService;
-use application\services\app\forms\CreateAppLanguageForm;
-use application\domains\app\business\App;
+use application\domains\customer\entities\Customer;
+use application\services\customer\forms\CreateCustomerForm;
 use yii\base\Exception;
 
-class CreateAppService extends AbstractService
+class CreateCustomerService extends AbstractService
 {
     /**
      * Business logic to store data for multiple resources.
@@ -95,37 +200,38 @@ class CreateAppService extends AbstractService
      */
     public function execute()
     {
-        try {
-            $model = new App();
-            $model->load($this->getForm()->attributes, '');
+        /** @var CreateCustomerForm $form */
+        $form = $this->getForm();
 
-            if ($model->save()) {
-                $this->assignLanguages($model->id, $this->getForm()->languages);
-                $this->setId($model->id);
+        /** @var Customer $entity */
+        $entity = $this->getRepository()->hydrate([]);
+        $entity->setAttributes($form->attributes, false);
 
-                return true;
-            }
-        } catch(\yii\db\Exception $e) {
-            $this->getForm()->addErrors(['exception' => $e->getMessage()]);
+        if ($this->getRepository()->insert($entity)) {
+            $this->setId($entity->id);
+            return true;
         }
+
+        $form->addErrors($entity->getErrors());
+
         return false;
     }
 
-    private function assignLanguages($appId, $languageIds)
+    private function assignLanguages($customerId, $languageIds)
     {
         foreach ($languageIds as $languageId) {
-            $form = new CreateAppLanguageForm([
-                'app_id' => $appId,
+            $form = new CreateCustomerLanguageForm([
+                'customerId' => $customerId,
                 'language_id' => $languageId,
             ]);
 
             if ($form->validate() === false) {
-                throw new Exception('Unable to validate language for this app');
+                throw new Exception('Unable to validate language for this customer');
             }
 
-            $service = new CreateAppLanguageService($form);
+            $service = new CreateCustomerLanguageService($form);
             if ($service->execute() === false) {
-                throw new Exception('Unable to save language for this app');
+                throw new Exception('Unable to save language for this customer');
             }
         }
     }
@@ -133,7 +239,7 @@ class CreateAppService extends AbstractService
 
 ```
 
-And this is how you can use it in the controller
+And this is how you can use it in a web controller:
 
 ```php
 <?php
@@ -141,19 +247,19 @@ And this is how you can use it in the controller
 namespace application\controllers;
 
 use Yii;
-use application\services\app\forms\CreateAppForm;
-use application\services\app\CreateAppService;
+use application\services\customer\forms\CreateCustomerForm;
+use application\services\customer\CreateCustomerService;
 
-class AppController extends \yii\web\Controller
+class CustomerController extends \yii\web\Controller
 {
     public function actionCreate()
     {
-        $form = new CreateAppForm();
+        $form = new CreateCustomerForm();
         
         if ($form->load(Yii::$app->request->post()) && $form->validate()) {
-            $service = new CreateAppService($form);
+            $service = new CreateCustomerService($form);
             if ($service->execute()) {
-                AlertWidget::addSuccess('App created successfully!');
+                AlertWidget::addSuccess('Customer created successfully!');
                 return $this->redirect(['view', 'id' => $service->getId()]);
             }
         }
@@ -163,5 +269,49 @@ class AppController extends \yii\web\Controller
         ]);
     }
 }
+```
+
+And this is how you can use it in a REST controller:
+
+```php
+<?php
+
+namespace application\modules\api\v1\controllers;
+
+use Yii;
+use albertborsos\rest\active\CreateAction;
+use albertborsos\rest\active\DeleteAction;
+use albertborsos\rest\active\IndexAction;
+use albertborsos\rest\active\UpdateAction;
+use albertborsos\rest\active\ViewAction;
+
+class CustomerController extends \yii\rest\Controller
+{
+    public $repositoryInterface = CustomerActiveRepositoryInterface::class;
+
+    public function actions()
+    {
+        return [
+            'index' => IndexAction::class,
+            'view' => ViewAction::class,
+            'create' => [
+                'class' => CreateAction::class,
+                'formClass' => CreateCustomerForm::class,
+                'serviceClass' => CreateCustomerService::class,
+            ],
+            'update' => [
+                'class' => UpdateAction::class,
+                'formClass' => UpdateCustomerForm::class,
+                'serviceClass' => UpdateCustomerService::class,
+            ],
+            'delete' => [
+                'class' => DeleteAction::class,
+                'formClass' => DeleteCustomerForm::class,
+                'serviceClass' => DeleteCustomerService::class,
+            ],
+            'options' => OptionsAction::class,
+        ];
+    }
+}
 
 ```
diff --git a/UPGRADE.md b/UPGRADE.md
new file mode 100644
index 00000000..5ce8241d
--- /dev/null
+++ b/UPGRADE.md
@@ -0,0 +1,5 @@
+Upgrading from 1.0.0
+====================
+
+ - use `\albertborsos\ddd\interfaces\EntityInterface` instead of `\albertborsos\ddd\interfaces\BusinessObject`
+ 
diff --git a/codeception.yml b/codeception.yml
index c3f75f78..8ccf62ec 100644
--- a/codeception.yml
+++ b/codeception.yml
@@ -5,12 +5,16 @@ paths:
     support: tests/_support
     envs: tests/_envs
 actor_suffix: Tester
-settings:
-    bootstrap: _bootstrap.php
 extensions:
     enabled:
         - Codeception\Extension\RunFailed
+modules:
+    enabled:
+        - Yii2:
+            configFile: 'tests/config/main.php'
 coverage:
     enabled: true
     include:
         - src/*
+    exclude:
+        - src/web/*
diff --git a/composer.json b/composer.json
index 6baa68fc..ae4dff03 100644
--- a/composer.json
+++ b/composer.json
@@ -1,7 +1,7 @@
 {
     "name": "albertborsos/yii2-ddd",
     "description": "Classes for Domain-Driven Development with Yii 2.0 Framework",
-    "type": "library",
+    "type": "yii2-extension",
     "keywords": ["yii2","extension"],
     "license": "MIT",
     "authors": [
@@ -12,21 +12,36 @@
     ],
     "require": {
         "php": ">=7.1.0",
-        "yiisoft/yii2": "~2.0.0"
+        "yiisoft/yii2": "~2.0.14",
+        "samdark/hydrator": "^1.0.2"
     },
     "require-dev": {
-        "codeception/base": "~3.0",
+        "codeception/codeception": "~3.0",
         "codeception/verify": "~1.0",
         "codeception/specify": "~1.0",
         "codeception/mockery-module": "^0.3.0",
-        "satooshi/php-coveralls": "^2.1",
-        "mito/yii2-coding-standards": "~2.0.0@beta"
+        "mockery/mockery": "^0.9.9 || ^1.0.0",
+        "phpunit/phpunit": "^7.0.0",
+        "hoa/file": "~1.0",
+        "hoa/consistency": "^1.17.05.02",
+        "squizlabs/php_codesniffer": "~2.8",
+        "php-coveralls/php-coveralls": "^2.1",
+        "mito/yii2-coding-standards": "~2.0.0-beta16"
+    },
+    "suggest": {
+        "albertborsos/yii2-rest": "If you want to easily use DDD forms and services in REST API endpoints."
+    },
+    "extra": {
+        "bootstrap": "albertborsos\\ddd\\Bootstrap"
     },
     "autoload": {
         "psr-4": {
             "albertborsos\\ddd\\": "src/",
             "albertborsos\\ddd\\tests\\": "tests/",
-            "albertborsos\\ddd\\tests\\support\\base\\": "tests/_support/base/"
+            "albertborsos\\ddd\\tests\\support\\base\\": "tests/_support/base/",
+            "albertborsos\\ddd\\tests\\support\\base\\domains\\": "tests/_support/base/domains",
+            "albertborsos\\ddd\\tests\\support\\base\\modules\\": "tests/_support/base/modules",
+            "albertborsos\\ddd\\tests\\support\\base\\services\\": "tests/_support/base/services"
         }
     },
     "repositories": [
diff --git a/composer.lock b/composer.lock
deleted file mode 100644
index 48558e3b..00000000
--- a/composer.lock
+++ /dev/null
@@ -1,4465 +0,0 @@
-{
-    "_readme": [
-        "This file locks the dependencies of your project to a known state",
-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
-        "This file is @generated automatically"
-    ],
-    "content-hash": "4bc534048e49c307bcac3f95a0b50611",
-    "packages": [
-        {
-            "name": "bower-asset/inputmask",
-            "version": "3.3.11",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/RobinHerbots/Inputmask.git",
-                "reference": "5e670ad62f50c738388d4dcec78d2888505ad77b"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/RobinHerbots/Inputmask/zipball/5e670ad62f50c738388d4dcec78d2888505ad77b",
-                "reference": "5e670ad62f50c738388d4dcec78d2888505ad77b"
-            },
-            "require": {
-                "bower-asset/jquery": ">=1.7"
-            },
-            "type": "bower-asset",
-            "license": [
-                "http://opensource.org/licenses/mit-license.php"
-            ]
-        },
-        {
-            "name": "bower-asset/jquery",
-            "version": "3.4.1",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/jquery/jquery-dist.git",
-                "reference": "15bc73803f76bc53b654b9fdbbbc096f56d7c03d"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/jquery/jquery-dist/zipball/15bc73803f76bc53b654b9fdbbbc096f56d7c03d",
-                "reference": "15bc73803f76bc53b654b9fdbbbc096f56d7c03d"
-            },
-            "type": "bower-asset",
-            "license": [
-                "MIT"
-            ]
-        },
-        {
-            "name": "bower-asset/punycode",
-            "version": "v1.3.2",
-            "source": {
-                "type": "git",
-                "url": "git@github.com:bestiejs/punycode.js.git",
-                "reference": "38c8d3131a82567bfef18da09f7f4db68c84f8a3"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/bestiejs/punycode.js/zipball/38c8d3131a82567bfef18da09f7f4db68c84f8a3",
-                "reference": "38c8d3131a82567bfef18da09f7f4db68c84f8a3"
-            },
-            "type": "bower-asset"
-        },
-        {
-            "name": "bower-asset/yii2-pjax",
-            "version": "2.0.7.1",
-            "source": {
-                "type": "git",
-                "url": "git@github.com:yiisoft/jquery-pjax.git",
-                "reference": "aef7b953107264f00234902a3880eb50dafc48be"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/yiisoft/jquery-pjax/zipball/aef7b953107264f00234902a3880eb50dafc48be",
-                "reference": "aef7b953107264f00234902a3880eb50dafc48be"
-            },
-            "require": {
-                "bower-asset/jquery": ">=1.8"
-            },
-            "type": "bower-asset",
-            "license": [
-                "MIT"
-            ]
-        },
-        {
-            "name": "cebe/markdown",
-            "version": "1.2.1",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/cebe/markdown.git",
-                "reference": "9bac5e971dd391e2802dca5400bbeacbaea9eb86"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/cebe/markdown/zipball/9bac5e971dd391e2802dca5400bbeacbaea9eb86",
-                "reference": "9bac5e971dd391e2802dca5400bbeacbaea9eb86",
-                "shasum": ""
-            },
-            "require": {
-                "lib-pcre": "*",
-                "php": ">=5.4.0"
-            },
-            "require-dev": {
-                "cebe/indent": "*",
-                "facebook/xhprof": "*@dev",
-                "phpunit/phpunit": "4.1.*"
-            },
-            "bin": [
-                "bin/markdown"
-            ],
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.2.x-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "cebe\\markdown\\": ""
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Carsten Brandt",
-                    "email": "mail@cebe.cc",
-                    "homepage": "http://cebe.cc/",
-                    "role": "Creator"
-                }
-            ],
-            "description": "A super fast, highly extensible markdown parser for PHP",
-            "homepage": "https://github.com/cebe/markdown#readme",
-            "keywords": [
-                "extensible",
-                "fast",
-                "gfm",
-                "markdown",
-                "markdown-extra"
-            ],
-            "time": "2018-03-26T11:24:36+00:00"
-        },
-        {
-            "name": "ezyang/htmlpurifier",
-            "version": "v4.10.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/ezyang/htmlpurifier.git",
-                "reference": "d85d39da4576a6934b72480be6978fb10c860021"
-            },
-            "dist": {
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-                "url": "https://api.github.com/repos/ezyang/htmlpurifier/zipball/d85d39da4576a6934b72480be6978fb10c860021",
-                "reference": "d85d39da4576a6934b72480be6978fb10c860021",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=5.2"
-            },
-            "require-dev": {
-                "simpletest/simpletest": "^1.1"
-            },
-            "type": "library",
-            "autoload": {
-                "psr-0": {
-                    "HTMLPurifier": "library/"
-                },
-                "files": [
-                    "library/HTMLPurifier.composer.php"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "LGPL"
-            ],
-            "authors": [
-                {
-                    "name": "Edward Z. Yang",
-                    "email": "admin@htmlpurifier.org",
-                    "homepage": "http://ezyang.com"
-                }
-            ],
-            "description": "Standards compliant HTML filter written in PHP",
-            "homepage": "http://htmlpurifier.org/",
-            "keywords": [
-                "html"
-            ],
-            "time": "2018-02-23T01:58:20+00:00"
-        },
-        {
-            "name": "yiisoft/yii2",
-            "version": "2.0.21",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/yiisoft/yii2-framework.git",
-                "reference": "7e4622252c5f272373e1339a47d331e4a55e9591"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/yiisoft/yii2-framework/zipball/7e4622252c5f272373e1339a47d331e4a55e9591",
-                "reference": "7e4622252c5f272373e1339a47d331e4a55e9591",
-                "shasum": ""
-            },
-            "require": {
-                "bower-asset/inputmask": "~3.2.2 | ~3.3.5",
-                "bower-asset/jquery": "3.4.*@stable | 3.3.*@stable | 3.2.*@stable | 3.1.*@stable | 2.2.*@stable | 2.1.*@stable | 1.11.*@stable | 1.12.*@stable",
-                "bower-asset/punycode": "1.3.*",
-                "bower-asset/yii2-pjax": "~2.0.1",
-                "cebe/markdown": "~1.0.0 | ~1.1.0 | ~1.2.0",
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-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/service-contracts.git",
-                "reference": "f391a00de78ec7ec8cf5cdcdae59ec7b883edb8d"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/service-contracts/zipball/f391a00de78ec7ec8cf5cdcdae59ec7b883edb8d",
-                "reference": "f391a00de78ec7ec8cf5cdcdae59ec7b883edb8d",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^7.1.3",
-                "psr/container": "^1.0"
-            },
-            "suggest": {
-                "symfony/service-implementation": ""
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.1-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Contracts\\Service\\": ""
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Nicolas Grekas",
-                    "email": "p@tchwork.com"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Generic abstractions related to writing services",
-            "homepage": "https://symfony.com",
-            "keywords": [
-                "abstractions",
-                "contracts",
-                "decoupling",
-                "interfaces",
-                "interoperability",
-                "standards"
-            ],
-            "time": "2019-06-13T11:15:36+00:00"
-        },
-        {
-            "name": "symfony/stopwatch",
-            "version": "v4.3.1",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/stopwatch.git",
-                "reference": "6b100e9309e8979cf1978ac1778eb155c1f7d93b"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/stopwatch/zipball/6b100e9309e8979cf1978ac1778eb155c1f7d93b",
-                "reference": "6b100e9309e8979cf1978ac1778eb155c1f7d93b",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^7.1.3",
-                "symfony/service-contracts": "^1.0"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "4.3-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Component\\Stopwatch\\": ""
-                },
-                "exclude-from-classmap": [
-                    "/Tests/"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Fabien Potencier",
-                    "email": "fabien@symfony.com"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Symfony Stopwatch Component",
-            "homepage": "https://symfony.com",
-            "time": "2019-05-27T08:16:38+00:00"
-        },
-        {
-            "name": "symfony/yaml",
-            "version": "v4.3.1",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/yaml.git",
-                "reference": "c60ecf5ba842324433b46f58dc7afc4487dbab99"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/c60ecf5ba842324433b46f58dc7afc4487dbab99",
-                "reference": "c60ecf5ba842324433b46f58dc7afc4487dbab99",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^7.1.3",
-                "symfony/polyfill-ctype": "~1.8"
-            },
-            "conflict": {
-                "symfony/console": "<3.4"
-            },
-            "require-dev": {
-                "symfony/console": "~3.4|~4.0"
-            },
-            "suggest": {
-                "symfony/console": "For validating YAML files using the lint command"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "4.3-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Component\\Yaml\\": ""
-                },
-                "exclude-from-classmap": [
-                    "/Tests/"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Fabien Potencier",
-                    "email": "fabien@symfony.com"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Symfony Yaml Component",
-            "homepage": "https://symfony.com",
-            "time": "2019-04-06T14:04:46+00:00"
-        },
-        {
-            "name": "theseer/tokenizer",
-            "version": "1.1.3",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/theseer/tokenizer.git",
-                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
-                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
-                "shasum": ""
-            },
-            "require": {
-                "ext-dom": "*",
-                "ext-tokenizer": "*",
-                "ext-xmlwriter": "*",
-                "php": "^7.0"
-            },
-            "type": "library",
-            "autoload": {
-                "classmap": [
-                    "src/"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "BSD-3-Clause"
-            ],
-            "authors": [
-                {
-                    "name": "Arne Blankerts",
-                    "email": "arne@blankerts.de",
-                    "role": "Developer"
-                }
-            ],
-            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
-            "time": "2019-06-13T22:48:21+00:00"
-        },
-        {
-            "name": "webmozart/assert",
-            "version": "1.4.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/webmozart/assert.git",
-                "reference": "83e253c8e0be5b0257b881e1827274667c5c17a9"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/webmozart/assert/zipball/83e253c8e0be5b0257b881e1827274667c5c17a9",
-                "reference": "83e253c8e0be5b0257b881e1827274667c5c17a9",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^5.3.3 || ^7.0",
-                "symfony/polyfill-ctype": "^1.8"
-            },
-            "require-dev": {
-                "phpunit/phpunit": "^4.6",
-                "sebastian/version": "^1.0.1"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.3-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Webmozart\\Assert\\": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Bernhard Schussek",
-                    "email": "bschussek@gmail.com"
-                }
-            ],
-            "description": "Assertions to validate method input/output with nice error messages.",
-            "keywords": [
-                "assert",
-                "check",
-                "validate"
-            ],
-            "time": "2018-12-25T11:19:39+00:00"
-        }
-    ],
-    "aliases": [],
-    "minimum-stability": "stable",
-    "stability-flags": {
-        "mito/yii2-coding-standards": 10
-    },
-    "prefer-stable": false,
-    "prefer-lowest": false,
-    "platform": {
-        "php": ">=7.1.0"
-    },
-    "platform-dev": []
-}
diff --git a/phpcs.sh b/phpcs.sh
index ea8c84f4..ca0ef0aa 100644
--- a/phpcs.sh
+++ b/phpcs.sh
@@ -1,8 +1,8 @@
 #!/bin/sh
 
-php ./vendor/bin/phpcs --standard=vendor/mito/yii2-coding-standards/Application src/interfaces && php ./vendor/bin/phpcs --standard=vendor/mito/yii2-coding-standards/Application src/models
+php ./vendor/bin/phpcs --standard=vendor/mito/yii2-coding-standards/Application src
 SRC=$?
-php ./vendor/bin/phpcs --standard=vendor/mito/yii2-coding-standards/Application -s --exclude=PSR1.Files.SideEffects,PSR1.Classes.ClassDeclaration --extensions=php  tests
+php ./vendor/bin/phpcs --standard=vendor/mito/yii2-coding-standards/Application -s --exclude=PSR1.Files.SideEffects,PSR1.Classes.ClassDeclaration --extensions=php --ignore=migrations/* tests
 TESTS=$?
 
 if [ $SRC -ne 0 ] || [ $TESTS -ne 0 ]; then
diff --git a/src/Bootstrap.php b/src/Bootstrap.php
new file mode 100644
index 00000000..1b419ef5
--- /dev/null
+++ b/src/Bootstrap.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace albertborsos\ddd;
+
+use albertborsos\ddd\hydrators\ActiveHydrator;
+use albertborsos\ddd\interfaces\HydratorInterface;
+use albertborsos\ddd\traits\SetContainerDefinitionsTrait;
+use yii\base\Application;
+use yii\base\BootstrapInterface;
+
+/**
+ * Class Bootstrap
+ * @package albertborsos\ddd
+ * @since 2.0.0
+ */
+class Bootstrap implements BootstrapInterface
+{
+    use SetContainerDefinitionsTrait;
+
+    /**
+     * Bootstrap method to be called during application bootstrap stage.
+     * @param Application $app the application currently running
+     */
+    public function bootstrap($app)
+    {
+        $this->setContainerDefinitions($app);
+    }
+
+    /**
+     * Returns the DI Container definitions map in an array, with key-value pairs.
+     * The keys are the Interface names and the values are the class names of the desired implementation of the interface.
+     *
+     * example:
+     *
+     * ```
+     *  return [
+     *      albertborsos\ddd\interfaces\HydratorInterface::class => albertborsos\ddd\hydrators\ActiveHydrator::class,
+     *  ];
+     * ```
+     *
+     * @return array
+     */
+    protected static function getContainerDefinitions(): array
+    {
+        return [
+            HydratorInterface::class => ActiveHydrator::class,
+        ];
+    }
+}
diff --git a/src/base/EntityEvent.php b/src/base/EntityEvent.php
new file mode 100644
index 00000000..414bcb1b
--- /dev/null
+++ b/src/base/EntityEvent.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace albertborsos\ddd\base;
+
+/**
+ * EntityEvent represents the parameter needed by [[Entity]] events.
+ *
+ * @since 2.0.0
+ */
+class EntityEvent extends \yii\base\Event
+{
+    /**
+     * @var bool whether the entity is in valid status. Defaults to true.
+     * A entity is in valid status if it passes validations or certain checks.
+     */
+    public $isValid = true;
+
+    /**
+     * @var array
+     */
+    public $dirtyAttributes = [];
+}
diff --git a/src/behaviors/BlameableBehavior.php b/src/behaviors/BlameableBehavior.php
new file mode 100644
index 00000000..57dd9de4
--- /dev/null
+++ b/src/behaviors/BlameableBehavior.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace albertborsos\ddd\behaviors;
+
+use albertborsos\ddd\traits\EvaluateAttributesTrait;
+
+class BlameableBehavior extends \yii\behaviors\BlameableBehavior
+{
+    use EvaluateAttributesTrait;
+
+    public $createdByAttribute = 'createdBy';
+
+    public $updatedByAttribute = 'updatedBy';
+}
diff --git a/src/behaviors/SluggableBehavior.php b/src/behaviors/SluggableBehavior.php
new file mode 100644
index 00000000..55f430c3
--- /dev/null
+++ b/src/behaviors/SluggableBehavior.php
@@ -0,0 +1,135 @@
+<?php
+
+namespace albertborsos\ddd\behaviors;
+
+use albertborsos\ddd\base\EntityEvent;
+use albertborsos\ddd\interfaces\ActiveRepositoryInterface;
+use albertborsos\ddd\interfaces\EntityInterface;
+use albertborsos\ddd\interfaces\RepositoryInterface;
+use albertborsos\ddd\traits\EvaluateAttributesTrait;
+use Yii;
+use yii\base\InvalidConfigException;
+use yii\db\BaseActiveRecord;
+use yii\helpers\ArrayHelper;
+use yii\validators\UniqueValidator;
+
+class SluggableBehavior extends \yii\behaviors\SluggableBehavior
+{
+    use EvaluateAttributesTrait;
+
+    /** @var ActiveRepositoryInterface */
+    public $repository;
+
+    public function init()
+    {
+        if (empty($this->attributes)) {
+            $this->attributes = [
+                EntityInterface::EVENT_BEFORE_INSERT => $this->slugAttribute,
+                EntityInterface::EVENT_BEFORE_UPDATE => $this->slugAttribute,
+            ];
+        }
+
+        if ($this->attribute === null && $this->value === null) {
+            throw new InvalidConfigException('Either "attribute" or "value" property must be specified.');
+        }
+
+        if ($this->ensureUnique && empty($this->repository)) {
+            throw new InvalidConfigException(get_called_class() . '::$repository must be set!');
+        }
+
+        if ($this->repository) {
+            /** @var ActiveRepositoryInterface $repository */
+            $repository = \Yii::createObject($this->repository);
+            $this->setRepository($repository);
+        }
+    }
+
+    /**
+     * @return ActiveRepositoryInterface
+     */
+    protected function getRepository()
+    {
+        return $this->repository;
+    }
+
+    /**
+     * @param ActiveRepositoryInterface $repository
+     */
+    protected function setRepository(ActiveRepositoryInterface $repository): void
+    {
+        $this->repository = $repository;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function getValue($event)
+    {
+        if (!$this->isNewSlugNeededByEvent($event)) {
+            return $this->owner->{$this->slugAttribute};
+        }
+
+        if ($this->attribute !== null) {
+            $slugParts = [];
+            foreach ((array)$this->attribute as $attribute) {
+                $part = ArrayHelper::getValue($this->owner, $attribute);
+                if ($this->skipOnEmpty && $this->isEmpty($part)) {
+                    return $this->owner->{$this->slugAttribute};
+                }
+                $slugParts[] = $part;
+            }
+            $slug = $this->generateSlug($slugParts);
+        } else {
+            $slug = parent::getValue($event);
+        }
+
+        return $this->ensureUnique ? $this->makeUnique($slug) : $slug;
+    }
+
+    protected function isNewSlugNeededByEvent(EntityEvent $event)
+    {
+        if (empty($this->owner->{$this->slugAttribute})) {
+            return true;
+        }
+
+        if ($this->immutable) {
+            return false;
+        }
+
+        if ($this->attribute === null) {
+            return true;
+        }
+
+        foreach ((array)$this->attribute as $attribute) {
+            if (in_array($attribute, array_keys($event->dirtyAttributes))) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Checks if given slug value is unique.
+     * @param string $slug slug value
+     * @return bool whether slug is unique.
+     */
+    protected function validateSlug($slug)
+    {
+        /* @var $validator UniqueValidator */
+        /* @var $model BaseActiveRecord */
+        $validator = Yii::createObject(array_merge(
+            [
+                'class' => UniqueValidator::className(),
+            ],
+            $this->uniqueValidator
+        ));
+
+        $model = Yii::createObject($this->repository->getDataModelClass());
+        $model->clearErrors();
+        $model->{$this->slugAttribute} = $slug;
+
+        $validator->validateAttribute($model, $this->slugAttribute);
+        return !$model->hasErrors();
+    }
+}
diff --git a/src/behaviors/TimestampBehavior.php b/src/behaviors/TimestampBehavior.php
new file mode 100644
index 00000000..057f1dfb
--- /dev/null
+++ b/src/behaviors/TimestampBehavior.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace albertborsos\ddd\behaviors;
+
+use albertborsos\ddd\interfaces\EntityInterface;
+use albertborsos\ddd\traits\EvaluateAttributesTrait;
+
+class TimestampBehavior extends \yii\behaviors\TimestampBehavior
+{
+    use EvaluateAttributesTrait;
+
+    public $createdAtAttribute = 'createdAt';
+
+    public $updatedAtAttribute = 'updatedAt';
+
+    public function init()
+    {
+        $this->setDefaultAttributes();
+        parent::init();
+    }
+
+    protected function setDefaultAttributes(): void
+    {
+        if (!empty($this->attributes)) {
+            return;
+        }
+
+        $this->attributes = [
+            EntityInterface::EVENT_BEFORE_INSERT => [$this->createdAtAttribute, $this->updatedAtAttribute],
+            EntityInterface::EVENT_BEFORE_UPDATE => $this->updatedAtAttribute,
+        ];
+    }
+}
diff --git a/src/data/ActiveEntityDataProvider.php b/src/data/ActiveEntityDataProvider.php
new file mode 100644
index 00000000..3e82fcba
--- /dev/null
+++ b/src/data/ActiveEntityDataProvider.php
@@ -0,0 +1,70 @@
+<?php
+
+namespace albertborsos\ddd\data;
+
+use albertborsos\ddd\models\AbstractEntity;
+use Yii;
+use yii\data\ActiveDataProvider;
+use yii\base\InvalidConfigException;
+use albertborsos\ddd\interfaces\EntityInterface;
+use albertborsos\ddd\interfaces\HydratorInterface;
+use yii\db\ActiveRecordInterface;
+use yii\helpers\Inflector;
+
+/**
+ * Class ActiveEntityDataProvider implement a data provider based on ActiveDataProvider
+ *
+ * ActiveEntityDataProvider converts the ActiveRecord instances to EntityInterface instances.
+ *
+ * The following is an example of using ActiveEntityDataProvider to provide EntityInterface instances:
+ *
+ * ```php
+ * $dataProvider = new ActiveEntityDataProvider([
+ *     'entityClass' => $this->entityClass,
+ *     'hydrator' => $this->hydrator,
+ *     'query' => $query,
+ *     'pagination' => [
+ *         'pageSize' => 20,
+ *     ],
+ *  ]);
+ * ```
+ *
+ * @package albertborsos\ddd\data
+ * @since 2.0.0
+ */
+class ActiveEntityDataProvider extends ActiveDataProvider
+{
+    /** @var string */
+    public $entityClass;
+
+    /** @var HydratorInterface */
+    public $hydrator;
+
+    /**
+     * @throws InvalidConfigException
+     */
+    public function init()
+    {
+        parent::init();
+        if (empty($this->entityClass)) {
+            throw new InvalidConfigException(get_class($this) . '::$entityClass must be set.');
+        }
+
+        if (!Yii::createObject($this->entityClass) instanceof EntityInterface) {
+            throw new InvalidConfigException(get_class($this) . '::$entityClass must implements ' . EntityInterface::class);
+        }
+
+        if (!$this->hydrator instanceof HydratorInterface) {
+            throw new InvalidConfigException(get_called_class() . '::$hydrator must implements `' . HydratorInterface::class . '`');
+        }
+    }
+
+    /**
+     * @return AbstractEntity[]
+     * @throws InvalidConfigException
+     */
+    protected function prepareModels()
+    {
+        return $this->hydrator->hydrateAll($this->entityClass, parent::prepareModels());
+    }
+}
diff --git a/src/data/ActiveEvent.php b/src/data/ActiveEvent.php
new file mode 100644
index 00000000..0a6544d0
--- /dev/null
+++ b/src/data/ActiveEvent.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace albertborsos\ddd\data;
+
+use yii\base\Event;
+use yii\db\ActiveRecordInterface;
+
+/**
+ * Class ActiveEvent
+ *
+ * ActiveRepository instances fires this event with an `ActiveRecord` model instance as the value of the `sender` property.
+ *
+ * @package albertborsos\ddd\data
+ * @since 2.0.0
+ */
+class ActiveEvent extends Event
+{
+    const SCENARIO_INSERT = 'insert';
+    const SCENARIO_UPDATE = 'update';
+
+    /**
+     * @var ActiveRecordInterface
+     */
+    public $sender;
+
+    /**
+     * @var string
+     */
+    public $scenario;
+}
diff --git a/src/hydrators/ActiveHydrator.php b/src/hydrators/ActiveHydrator.php
new file mode 100644
index 00000000..6195ef88
--- /dev/null
+++ b/src/hydrators/ActiveHydrator.php
@@ -0,0 +1,102 @@
+<?php
+
+namespace albertborsos\ddd\hydrators;
+
+use albertborsos\ddd\interfaces\EntityInterface;
+use albertborsos\ddd\interfaces\HydratorInterface;
+use albertborsos\ddd\models\AbstractEntity;
+use yii\base\Component;
+use yii\base\Model;
+
+/**
+ * Class ActiveHydrator
+ *
+ * Hydrates an instance from an array or from a `\yii\base\Model` instance.
+ * If the hydrated object is an instance of `EntityInterface` then it tries to hydrate the relations too.
+ *
+ * @package albertborsos\ddd\hydrators
+ * @since 2.0.0
+ */
+class ActiveHydrator extends Component implements HydratorInterface
+{
+    /** @var \samdark\hydrator\Hydrator */
+    protected $hydrator;
+
+    public function __construct($map, $config = [])
+    {
+        parent::__construct($config);
+        $this->hydrator = new \samdark\hydrator\Hydrator($map);
+    }
+
+    /**
+     * @param $className
+     * @param array|Model $data
+     * @return object
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function hydrate($className, $data)
+    {
+        $model = $this->hydrator->hydrateInto($data, \Yii::createObject($className));
+
+        if (!$model instanceof EntityInterface) {
+            return $model;
+        }
+
+        $entity = $model;
+        unset($model);
+
+        $relationMapping = $entity->relationMapping();
+        if (empty($relationMapping)) {
+            return $entity;
+        }
+
+        foreach ($relationMapping as $relationName => $entityClass) {
+            /** @var EntityInterface $relationEntity */
+            $relationEntity = \Yii::createObject($entityClass);
+            $relationHydrator = \Yii::createObject(static::class, [$relationEntity->fieldMapping()]);
+
+            if (!isset($data->$relationName)) {
+                continue;
+            }
+
+            $relationData = is_array($data->$relationName)
+                ? $relationHydrator->hydrateAll($entityClass, $data->$relationName)
+                : $relationHydrator->hydrate($entityClass, $data->$relationName->attributes);
+
+            $this->hydrator->hydrateInto([$relationName => $relationData], $entity);
+        }
+
+        return $entity;
+    }
+
+    /**
+     * @param $className
+     * @param array|Model[] $data
+     * @return array
+     */
+    public function hydrateAll($className, array $data): array
+    {
+        return array_map(function ($activeRecord) use ($className) {
+            return $this->hydrate($className, $activeRecord);
+        }, $data);
+    }
+
+    /**
+     * @param $object
+     * @param array $data
+     * @return object
+     */
+    public function hydrateInto($object, array $data)
+    {
+        return $this->hydrator->hydrateInto($data, $object);
+    }
+
+    /**
+     * @param $object
+     * @return array
+     */
+    public function extract($object): array
+    {
+        return $this->hydrator->extract($object);
+    }
+}
diff --git a/src/interfaces/ActiveRepositoryInterface.php b/src/interfaces/ActiveRepositoryInterface.php
new file mode 100644
index 00000000..c66ce22f
--- /dev/null
+++ b/src/interfaces/ActiveRepositoryInterface.php
@@ -0,0 +1,80 @@
+<?php
+
+namespace albertborsos\ddd\interfaces;
+
+use yii\base\Model;
+use yii\db\ActiveQueryInterface;
+use yii\db\ActiveRecordInterface;
+use yii\db\Transaction;
+
+/**
+ * Interface ActiveRepositoryInterface
+ * @package albertborsos\ddd\interfaces
+ * @since 2.0.0
+ */
+interface ActiveRepositoryInterface extends RepositoryInterface
+{
+    /**
+     * @return ActiveQueryInterface the newly created [[ActiveQueryInterface]] instance.
+     */
+    public function find(): ActiveQueryInterface;
+
+    /**
+     * @param $condition
+     * @return EntityInterface|Model
+     */
+    public function findOne($condition): ?EntityInterface;
+
+    /**
+     * @param $condition
+     * @return array|EntityInterface[]|Model[]
+     */
+    public function findAll($condition): array;
+
+    /**
+     * @param EntityInterface $entity
+     * @param bool $runValidation
+     * @param null $attributeNames
+     * @return bool
+     */
+    public function save(EntityInterface $entity, $runValidation = true, $attributeNames = null): bool;
+
+    /**
+     * @param EntityInterface $entity
+     * @param bool $runValidation
+     * @param null $attributeNames
+     * @return bool
+     */
+    public function insert(EntityInterface $entity, $runValidation = true, $attributeNames = null): bool;
+
+    /**
+     * @param EntityInterface $entity
+     * @param ActiveRecordInterface|null $activeRecord
+     * @param bool $runValidation
+     * @param null $attributeNames
+     * @return bool
+     */
+    public function update(EntityInterface $entity, ActiveRecordInterface $activeRecord = null, $runValidation = true, $attributeNames = null): bool;
+
+    /**
+     * @param EntityInterface $entity
+     * @return bool
+     */
+    public function delete(EntityInterface $entity): bool;
+
+    /**
+     * @return string
+     */
+    public function getDataModelClass(): string;
+
+    /**
+     * @param $className
+     */
+    public function setDataModelClass($className): void;
+
+    /**
+     * @param null $isolationLevel
+     * @return Transaction
+     */
+    public function beginTransaction($isolationLevel = null): Transaction;
+}
diff --git a/src/interfaces/BusinessObject.php b/src/interfaces/BusinessObject.php
deleted file mode 100644
index 8e686773..00000000
--- a/src/interfaces/BusinessObject.php
+++ /dev/null
@@ -1,12 +0,0 @@
-<?php
-
-namespace albertborsos\ddd\interfaces;
-
-/**
- * Interface BusinessObject
- * @package albertborsos\ddd\interfaces
- */
-interface BusinessObject
-{
-
-}
diff --git a/src/interfaces/CacheRepositoryInterface.php b/src/interfaces/CacheRepositoryInterface.php
new file mode 100644
index 00000000..6d92e929
--- /dev/null
+++ b/src/interfaces/CacheRepositoryInterface.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace albertborsos\ddd\interfaces;
+
+/**
+ * Interface CacheRepositoryInterface
+ * @package albertborsos\ddd\interfaces
+ * @since 2.0.0
+ */
+interface CacheRepositoryInterface extends RepositoryInterface
+{
+    public function get($key);
+
+    public function set($key, $value, $duration = null, $dependency = null);
+
+    public function delete($key);
+
+    /**
+     * @param $id
+     * @return EntityInterface|null
+     */
+    public function findById($id): ?EntityInterface;
+
+    /**
+     * @param EntityInterface $entity
+     * @return EntityInterface|null
+     */
+    public function findByEntity(EntityInterface $entity): ?EntityInterface;
+
+    /**
+     * @param string $key
+     * @return EntityInterface|null
+     */
+    public function findEntityByKey(string $key): ?EntityInterface;
+
+    /**
+     * @param EntityInterface $entity
+     * @param array $keyAttributes
+     * @param null $duration
+     * @param null $dependency
+     * @return mixed
+     */
+    public function storeEntity(EntityInterface $entity, array $keyAttributes = [], $duration = null, $dependency = null);
+}
diff --git a/src/interfaces/ConsoleCacheControllerInterface.php b/src/interfaces/ConsoleCacheControllerInterface.php
new file mode 100644
index 00000000..5c34b652
--- /dev/null
+++ b/src/interfaces/ConsoleCacheControllerInterface.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace albertborsos\ddd\interfaces;
+
+interface ConsoleCacheControllerInterface
+{
+    public function actionHydrate();
+}
diff --git a/src/interfaces/EntityInterface.php b/src/interfaces/EntityInterface.php
new file mode 100644
index 00000000..68c68610
--- /dev/null
+++ b/src/interfaces/EntityInterface.php
@@ -0,0 +1,118 @@
+<?php
+
+namespace albertborsos\ddd\interfaces;
+
+use yii\base\Event;
+use yii\base\Model;
+
+/**
+ * Interface EntityInterface
+ * @package albertborsos\ddd\interfaces
+ * @since 2.0.0
+ */
+interface EntityInterface
+{
+    /**
+     * @event AfterSaveEvent an event that is triggered after an entity is saved.
+     */
+    const EVENT_AFTER_SAVE   = 'afterSave';
+
+    /**
+     * @event Event an event that is triggered after an entity is deleted.
+     */
+    const EVENT_AFTER_DELETE = 'afterDelete';
+
+    /**
+     * @event EntityEvent an event that is triggered before inserting an entity.
+     * You may set [[EntityEvent::isValid]] to be `false` to stop the insertion.
+     */
+    const EVENT_BEFORE_INSERT = 'beforeInsert';
+
+    /**
+     * @event EntityEvent an event that is triggered before updating an entity.
+     * You may set [[EntityEvent::isValid]] to be `false` to stop the update.
+     */
+    const EVENT_BEFORE_UPDATE = 'beforeUpdate';
+
+    const EVENT_AFTER_INSERT = 'afterInsert';
+
+    const EVENT_AFTER_UPDATE = 'afterUpdate';
+
+    const EVENT_BEFORE_DELETE = 'beforeDelete';
+
+    /**
+     * @return string|array
+     */
+    public function getPrimaryKey();
+
+    /**
+     * Sets the primary key property (or properties) for the new entity from the model.
+     *
+     * @param Model $model
+     */
+    public function setPrimaryKey(Model $model): void;
+
+    /**
+     * Returns a unique cache key for the entity.
+     *
+     * You can override the key attributes. If you want to find a Page entity by it's slug attribute,
+     * then you can store the entity with a different key(s) then the default key(s).
+     *
+     * ```php
+     *     $cacheRepository->storeEntity($pageEntity, ['slug']);
+     * ```
+     *
+     * Then if you want to find a Page by it's slug attribute, you can get a cache key based on the slug:
+     *
+     * ```php
+     *     public function findBySlug($slug): ?PageEntity
+     *     {
+     *         $pageEntity = $this->hydrate(['slug' => $slug]);
+     *
+     *         return $this->findEntityByKey($pageEntity->getCacheKey(['slug']));
+     *     }
+     * ```
+     *
+     * You can also pass a postfix to the cache key, if you want to store a related entity.
+     *
+     * ```php
+     *     $cacheRepository->set($pageEntity->getCacheKey([], 'next-page'), $nextPage)
+     * ```
+     *
+     * @param string $postfix
+     * @param array $keyAttributes to override default key attributes
+     * @return string
+     */
+    public function getCacheKey(array $keyAttributes = [], string $postfix = null): string;
+
+    /**
+     * Returns the data attributes and properties mapping with the relation mapping too.
+     * This required to hydrate the Entity.
+     *
+     * @return array
+     */
+    public function fieldMapping(): array;
+
+    /**
+     * Mapping of property keys to entity classnames.
+     *
+     * @return array
+     */
+    public function relationMapping(): array;
+
+    /**
+     * Returns properties and their values which are not relation properties.
+     *
+     * @return array
+     */
+    public function getDataAttributes(): array;
+
+    /**
+     * Triggers an event.
+     * This method represents the happening of an event. It invokes
+     * all attached handlers for the event including class-level handlers.
+     * @param string $name the event name
+     * @param Event $event the event parameter. If not set, a default [[Event]] object will be created.
+     */
+    public function trigger($name, Event $event = null);
+}
diff --git a/src/interfaces/HydratorInterface.php b/src/interfaces/HydratorInterface.php
new file mode 100644
index 00000000..e81c4c1d
--- /dev/null
+++ b/src/interfaces/HydratorInterface.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace albertborsos\ddd\interfaces;
+
+/**
+ * Interface HydratorInterface
+ * @package albertborsos\ddd\interfaces
+ * @since 2.0.0
+ */
+interface HydratorInterface
+{
+    public function hydrate($className, $data);
+
+    public function hydrateAll($className, array $data): array;
+
+    public function hydrateInto($object, array $data);
+
+    public function extract($object): array;
+}
diff --git a/src/interfaces/RepositoryInterface.php b/src/interfaces/RepositoryInterface.php
new file mode 100644
index 00000000..f8bc0cf4
--- /dev/null
+++ b/src/interfaces/RepositoryInterface.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace albertborsos\ddd\interfaces;
+
+use yii\data\BaseDataProvider;
+
+/**
+ * Interface RepositoryInterface
+ * @package albertborsos\ddd\interfaces
+ * @since 2.0.0
+ */
+interface RepositoryInterface
+{
+    /**
+     * @param $data
+     * @return EntityInterface
+     */
+    public function hydrate($data): EntityInterface;
+
+    /**
+     * @param $entity
+     * @param $data
+     * @return EntityInterface
+     */
+    public function hydrateInto(EntityInterface $entity, $data): EntityInterface;
+
+    /**
+     * @param $models
+     * @return mixed
+     */
+    public function hydrateAll($models): array;
+
+    /**
+     * Creates data provider instance with search query applied
+     *
+     * @param $params
+     * @param null $formName
+     * @return BaseDataProvider
+     */
+    public function search($params, $formName = null): BaseDataProvider;
+
+    /**
+     * @return string
+     */
+    public function getEntityClass(): string;
+}
diff --git a/src/models/AbstractActiveService.php b/src/models/AbstractActiveService.php
new file mode 100644
index 00000000..f3525e54
--- /dev/null
+++ b/src/models/AbstractActiveService.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace albertborsos\ddd\models;
+
+use albertborsos\ddd\interfaces\ActiveRepositoryInterface;
+use albertborsos\ddd\interfaces\EntityInterface;
+use albertborsos\ddd\interfaces\FormObject;
+use albertborsos\ddd\interfaces\RepositoryInterface;
+use yii\base\Component;
+use yii\base\InvalidConfigException;
+
+/**
+ * Class AbstractDomain
+ * @package albertborsos\ddd\models
+ * @since 2.0.0
+ */
+abstract class AbstractActiveService extends AbstractService
+{
+    public function __construct(FormObject $form = null, EntityInterface $entity = null, $config = [])
+    {
+        parent::__construct($form, $entity, $config);
+    }
+
+    /**
+     * @return ActiveRepositoryInterface
+     */
+    protected function getRepository(): ActiveRepositoryInterface
+    {
+        return $this->repository;
+    }
+
+    /**
+     * @return bool
+     */
+    public function execute(): bool
+    {
+        /** @var FormObject $form */
+        $form = $this->getForm();
+
+        /** @var AbstractEntity $entity */
+        $entity = $this->getEntity() ?? $this->getRepository()->hydrate([]);
+        $entity->setAttributes($form->attributes, false);
+
+        if ($this->getRepository()->save($entity)) {
+            $this->setId($entity->id);
+            return true;
+        }
+
+        $form->addErrors($entity->getErrors());
+
+        return false;
+    }
+}
diff --git a/src/models/AbstractEntity.php b/src/models/AbstractEntity.php
new file mode 100644
index 00000000..930c6b97
--- /dev/null
+++ b/src/models/AbstractEntity.php
@@ -0,0 +1,143 @@
+<?php
+
+namespace albertborsos\ddd\models;
+
+use albertborsos\ddd\interfaces\EntityInterface;
+use yii\base\InvalidConfigException;
+use yii\base\Model;
+use yii\db\ActiveRecordInterface;
+use yii\helpers\Inflector;
+
+/**
+ * Class AbstractEntity
+ * @package albertborsos\ddd\models
+ *
+ * @property array $attributes
+ * @property array $dataAttributes
+ * @since 2.0.0
+ */
+abstract class AbstractEntity extends Model implements EntityInterface
+{
+    /**
+     * @return array|string
+     */
+    public function getPrimaryKey()
+    {
+        return ['id'];
+    }
+
+    /**
+     * Sets the primary key property (or properties) for the new entity from the model.
+     *
+     * @param Model $model
+     */
+    public function setPrimaryKey(Model $model): void
+    {
+        $keys = is_array($this->getPrimaryKey()) ? $this->getPrimaryKey() : [$this->getPrimaryKey()];
+        $keys = array_filter($keys);
+
+        array_walk($keys, function ($key) use ($model) {
+            $this->{$key} = $model->{$key};
+        });
+    }
+
+    /**
+     * Returns a unique cache key for the entity.
+     *
+     * You can override the key attributes. If you want to find a Page entity by it's slug attribute,
+     * then you can store the entity with a different key(s) then the default key(s).
+     *
+     * ```php
+     *     $cacheRepository->storeEntity($pageEntity, ['slug']);
+     * ```
+     *
+     * Then if you want to find a Page by it's slug attribute, you can get a cache key based on the slug:
+     *
+     * ```php
+     *     public function findBySlug($slug): ?PageEntity
+     *     {
+     *         $pageEntity = $this->hydrate(['slug' => $slug]);
+     *
+     *         return $this->findEntityByKey($pageEntity->getCacheKey(['slug']));
+     *     }
+     * ```
+     *
+     * You can also pass a postfix to the cache key, if you want to store a related entity.
+     *
+     * ```php
+     *     $cacheRepository->set($pageEntity->getCacheKey([], 'next-page'), $nextPage)
+     * ```
+     *
+     * @param string $postfix
+     * @param array $keyAttributes to override default key attributes
+     * @return string
+     * @throws InvalidConfigException
+     */
+    public function getCacheKey(array $keyAttributes = [], string $postfix = null): string
+    {
+        if (empty($keyAttributes)) {
+            $keyAttributes = is_array($this->getPrimaryKey()) ? $this->getPrimaryKey() : [$this->getPrimaryKey()];
+        }
+
+        $ids = array_map(function ($keyAttribute) {
+            return $this->{$keyAttribute};
+        }, array_filter($keyAttributes));
+
+        if (empty($ids)) {
+            throw new InvalidConfigException('Primary key must be set for entities to generate a unique cache key.');
+        }
+
+        $ids = array_combine($keyAttributes, $ids);
+
+        return implode('_', array_filter(array_merge([static::class], [http_build_query($ids)], [$postfix])));
+    }
+
+    /**
+     * Returns properties and their values which are not relation properties.
+     *
+     * @return array
+     */
+    public function getDataAttributes(): array
+    {
+        return array_map(function ($property) {
+            return $this->{$property};
+        }, $this->getDataAttributesPropertiesMap());
+    }
+
+    /**
+     * Returns the data attributes and properties mapping with the relation mapping too.
+     * This required to hydrate the Entity.
+     *
+     * @return array
+     */
+    public function fieldMapping(): array
+    {
+        $fields = $this->getDataAttributesPropertiesMap();
+        $relationFields = array_keys($this->relationMapping());
+
+        return array_merge($fields, array_combine($relationFields, $relationFields));
+    }
+
+    /**
+     * Returns the data attributes of the model and the properties of the entity in key value pairs.
+     * The keys are the attributes/fields/columns of the data model and the values are the properties of the entity.
+     *
+     * ```php
+     * [
+     *     'id' => 'id',
+     *     'parent_id' => 'parentId',
+     *     'name' => 'name',
+     * ]
+     * ```
+     *
+     * @return array|null
+     */
+    private function getDataAttributesPropertiesMap(): array
+    {
+        $map = array_map(function ($propertyName) {
+            return Inflector::underscore($propertyName);
+        }, array_combine($this->fields(), $this->fields()));
+
+        return array_flip($map);
+    }
+}
diff --git a/src/models/AbstractService.php b/src/models/AbstractService.php
index 788efd94..5922847a 100644
--- a/src/models/AbstractService.php
+++ b/src/models/AbstractService.php
@@ -2,12 +2,10 @@
 
 namespace albertborsos\ddd\models;
 
-use albertborsos\ddd\interfaces\BusinessObject;
+use albertborsos\ddd\interfaces\EntityInterface;
 use albertborsos\ddd\interfaces\FormObject;
+use albertborsos\ddd\interfaces\RepositoryInterface;
 use yii\base\Component;
-use yii\helpers\ArrayHelper;
-use yii\web\Link;
-use yii\web\Linkable;
 
 /**
  * Class AbstractDomain
@@ -15,6 +13,12 @@
  */
 abstract class AbstractService extends Component
 {
+    /**
+     * @var string|RepositoryInterface
+     * @since 2.0.0
+     */
+    protected $repository;
+
     /**
      * The ID of the (main) object
      * @var integer|mixed
@@ -27,53 +31,65 @@ abstract class AbstractService extends Component
     private $_form;
 
     /**
-     * @var \yii\db\ActiveRecord|BusinessObject
+     * @var EntityInterface
      */
-    private $_model;
+    private $_entity;
 
-    public function __construct(FormObject $form = null, BusinessObject $model = null)
+    public function __construct(FormObject $form = null, EntityInterface $entity = null, $config = [])
     {
         if ($form) {
             $this->setForm($form);
         }
-        if ($model) {
-            $this->setModel($model);
+        if ($entity) {
+            $this->setEntity($entity);
+        }
+        if ($this->repository) {
+            $repository = \Yii::createObject($this->repository);
+            $this->setRepository($repository);
         }
-        parent::__construct([]);
+        parent::__construct($config);
     }
 
     /**
      * @return boolean
      */
-    abstract public function execute();
+    abstract public function execute(): bool;
 
     /**
      * @return FormObject|\yii\base\Model
      */
-    protected function getForm()
+    protected function getForm(): ?FormObject
     {
         return $this->_form;
     }
 
+    /**
+     * @return EntityInterface
+     */
+    protected function getEntity(): ?EntityInterface
+    {
+        return $this->_entity;
+    }
 
     /**
-     * @return BusinessObject|ActiveRecord
+     * @return RepositoryInterface
+     * @since 2.0.0
      */
-    protected function getModel()
+    protected function getRepository()
     {
-        return $this->_model;
+        return $this->repository;
     }
 
     /**
      * @param $id
      */
-    protected function setId($id)
+    protected function setId($id): void
     {
         $this->_id = $id;
     }
 
     /**
-     * @return int
+     * @return int|array
      */
     public function getId()
     {
@@ -83,16 +99,24 @@ public function getId()
     /**
      * @param FormObject $form
      */
-    private function setForm(FormObject $form)
+    private function setForm(FormObject $form): void
     {
         $this->_form = $form;
     }
 
     /**
-     * @param BusinessObject $model
+     * @param EntityInterface $entity
+     */
+    private function setEntity(EntityInterface $entity): void
+    {
+        $this->_entity = $entity;
+    }
+
+    /**
+     * @param RepositoryInterface $repository
      */
-    private function setModel(BusinessObject $model)
+    protected function setRepository(RepositoryInterface $repository): void
     {
-        $this->_model = $model;
+        $this->repository = $repository;
     }
 }
diff --git a/src/repositories/AbstractActiveRepository.php b/src/repositories/AbstractActiveRepository.php
new file mode 100644
index 00000000..2f311e7e
--- /dev/null
+++ b/src/repositories/AbstractActiveRepository.php
@@ -0,0 +1,321 @@
+<?php
+
+namespace albertborsos\ddd\repositories;
+
+use albertborsos\ddd\base\EntityEvent;
+use albertborsos\ddd\data\ActiveEvent;
+use albertborsos\ddd\interfaces\ActiveRepositoryInterface;
+use albertborsos\ddd\interfaces\EntityInterface;
+use yii\base\InvalidArgumentException;
+use yii\base\InvalidConfigException;
+use yii\base\Model;
+use yii\db\ActiveQueryInterface;
+use yii\db\ActiveRecord;
+use yii\db\ActiveRecordInterface;
+use yii\db\Connection;
+use yii\db\Transaction;
+
+/**
+ * Class AbstractActiveRepository
+ * @package albertborsos\ddd\repositories
+ * @since 2.0.0
+ */
+abstract class AbstractActiveRepository extends AbstractRepository implements ActiveRepositoryInterface
+{
+    protected $dataModelClass;
+
+    public function init()
+    {
+        parent::init();
+        $this->validateDataModelClass();
+    }
+
+    /**
+     * @return ActiveQueryInterface the newly created [[ActiveQueryInterface]] instance.
+     */
+    public function find(): ActiveQueryInterface
+    {
+        return call_user_func([$this->getDataModelClass(), 'find']);
+    }
+
+    /**
+     * @param $condition
+     * @return EntityInterface|mixed
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function findOne($condition): ?EntityInterface
+    {
+        $model = call_user_func([$this->getDataModelClass(), 'findOne'], $condition);
+
+        if (empty($model)) {
+            return null;
+        }
+
+        return $this->hydrate($model);
+    }
+
+    /**
+     * @param $condition
+     * @return EntityInterface[]|array
+     */
+    public function findAll($condition): array
+    {
+        $models = call_user_func([$this->getDataModelClass(), 'findAll'], $condition);
+
+        return $this->hydrateAll($models);
+    }
+
+    /**
+     * @param EntityInterface|Model $entity
+     * @param bool $runValidation
+     * @param null $attributeNames
+     * @return bool|mixed
+     * @throws \Throwable
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function save(EntityInterface $entity, $runValidation = true, $attributeNames = null): bool
+    {
+        /** @var ActiveRecord $activeRecord */
+        $activeRecord = $this->findByEntity($entity);
+
+        if (empty($activeRecord)) {
+            return $this->insert($entity, $runValidation, $attributeNames, false);
+        }
+
+        return $this->update($entity, $activeRecord, $runValidation, $attributeNames);
+    }
+
+    /**
+     * @param EntityInterface $entity
+     * @param bool $runValidation
+     * @param null $attributeNames
+     * @param bool $checkIsNewRecord
+     * @return bool
+     * @throws InvalidConfigException
+     * @throws \Throwable
+     */
+    public function insert(EntityInterface $entity, $runValidation = true, $attributeNames = null, $checkIsNewRecord = true): bool
+    {
+        if ($checkIsNewRecord && !empty($this->findByEntity($entity))) {
+            throw new InvalidArgumentException('Entity already exists, but `insert` method is called');
+        }
+
+        /** @var ActiveRecord $activeRecord */
+        $activeRecord = \Yii::createObject($this->getDataModelClass(), [$entity->getDataAttributes()]);
+
+        return $this->insertInternal($entity, $activeRecord, $runValidation, $attributeNames);
+    }
+
+    /**
+     * @param EntityInterface $entity
+     * @param ActiveRecordInterface|null $activeRecord
+     * @param bool $runValidation
+     * @param null $attributeNames
+     * @return bool
+     * @throws InvalidConfigException
+     * @throws \Throwable
+     * @throws \yii\db\StaleObjectException
+     */
+    public function update(EntityInterface $entity, ActiveRecordInterface $activeRecord = null, $runValidation = true, $attributeNames = null): bool
+    {
+        /** @var ActiveRecord $activeRecord */
+        $activeRecord = $activeRecord ?: $this->findByEntity($entity);
+
+        if (empty($activeRecord)) {
+            throw new InvalidArgumentException('Entity is not stored yet, but `update` method is called');
+        }
+
+        return $this->updateInternal($entity, $activeRecord, $runValidation, $attributeNames);
+    }
+
+    /**
+     * @param EntityInterface|Model $entity
+     * @return bool|int
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function delete(EntityInterface $entity): bool
+    {
+        /** @var ActiveRecordInterface $activeRecord */
+        $activeRecord = $this->findByEntity($entity);
+
+        if (empty($activeRecord)) {
+            return false;
+        }
+
+        if (!$this->beforeDelete($entity)) {
+            return false;
+        }
+
+        if ($activeRecord->delete() !== false) {
+            $entity->trigger(EntityInterface::EVENT_AFTER_DELETE, new ActiveEvent(['sender' => $activeRecord]));
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * @param EntityInterface $entity
+     * @return ActiveRecordInterface|null
+     * @throws InvalidConfigException
+     */
+    protected function findByEntity(EntityInterface $entity): ?ActiveRecordInterface
+    {
+        return \Yii::createObject([$this->getDataModelClass(), 'findOne'], [$this->createFindConditionByEntityKeys($entity)]);
+    }
+
+    /**
+     * @return string
+     */
+    public function getDataModelClass(): string
+    {
+        return $this->dataModelClass;
+    }
+
+    /**
+     * @param $className
+     * @throws InvalidConfigException
+     */
+    public function setDataModelClass($className): void
+    {
+        $this->dataModelClass = $className;
+        $this->validateDataModelClass();
+    }
+
+    /**
+     * @param EntityInterface $entity
+     * @param ActiveRecord $activeRecord
+     * @param $runValidation
+     * @param $attributes
+     * @return bool
+     * @throws \Throwable
+     */
+    private function insertInternal(EntityInterface $entity, ActiveRecord $activeRecord, $runValidation, $attributes): bool
+    {
+        if (!$this->beforeSave(true, $entity)) {
+            return false;
+        }
+
+        $activeRecord->setAttributes($entity->getDataAttributes(), false);
+
+        if ($activeRecord->insert($runValidation, $attributes)) {
+            $entity->trigger(EntityInterface::EVENT_AFTER_SAVE, new ActiveEvent(['sender' => $activeRecord, 'scenario' => ActiveEvent::SCENARIO_INSERT]));
+            $entity->setPrimaryKey($activeRecord);
+            return true;
+        }
+
+        $entity->addErrors($activeRecord->getErrors());
+
+//        $this->afterSave(true, []);
+
+        return false;
+    }
+
+    /**
+     * @param EntityInterface $entity
+     * @param ActiveRecord $activeRecord
+     * @param $runValidation
+     * @param $attributes
+     * @return bool
+     * @throws \Throwable
+     * @throws \yii\db\StaleObjectException
+     */
+    private function updateInternal(EntityInterface $entity, ActiveRecord $activeRecord, $runValidation, $attributes): bool
+    {
+        $activeRecord->setAttributes($entity->getDataAttributes(), false);
+
+        if (!$this->beforeSave(false, $entity, $activeRecord->getDirtyAttributes())) {
+            return false;
+        }
+
+        // update attributes again, which are modified by behaviors
+        $activeRecord->setAttributes($entity->getDataAttributes(), false);
+
+        if ($activeRecord->update($runValidation, $attributes) !== false) {
+            $entity->trigger(EntityInterface::EVENT_AFTER_SAVE, new ActiveEvent(['sender' => $activeRecord, 'scenario' => ActiveEvent::SCENARIO_UPDATE]));
+            $entity->setPrimaryKey($activeRecord);
+            return true;
+        }
+
+        $entity->addErrors($activeRecord->getErrors());
+
+        return false;
+    }
+
+    /**
+     * @throws InvalidConfigException
+     */
+    private function validateDataModelClass(): void
+    {
+        if (empty($this->dataModelClass) || !\Yii::createObject($this->dataModelClass) instanceof ActiveRecordInterface) {
+            throw new InvalidConfigException(get_called_class() . '::$dataModelClass must implements `yii\db\ActiveRecordInterface`');
+        }
+    }
+
+    /**
+     * @param null $isolationLevel
+     * @return Transaction
+     * @throws InvalidConfigException
+     */
+    public function beginTransaction($isolationLevel = null): Transaction
+    {
+        return $this->resolveDatabase()->beginTransaction($isolationLevel);
+    }
+
+    /**
+     * @return Connection
+     * @throws InvalidConfigException
+     */
+    protected function resolveDatabase(): Connection
+    {
+        return \Yii::createObject([$this->getDataModelClass(), 'getDb']);
+    }
+
+    /**
+     * @param bool $insert
+     * @param EntityInterface $entity
+     * @param array $dirtyAttributes
+     * @return bool
+     */
+    public function beforeSave(bool $insert, EntityInterface $entity, array $dirtyAttributes = [])
+    {
+        $event = new EntityEvent(['dirtyAttributes' => $dirtyAttributes]);
+        $entity->trigger($insert ? EntityInterface::EVENT_BEFORE_INSERT : EntityInterface::EVENT_BEFORE_UPDATE, $event);
+
+        return $event->isValid;
+    }
+
+    /**
+     * @param EntityInterface $entity
+     * @return bool
+     */
+    public function beforeDelete(EntityInterface $entity)
+    {
+        $event = new EntityEvent();
+        $entity->trigger(EntityInterface::EVENT_BEFORE_DELETE, $event);
+
+        return $event->isValid;
+    }
+
+    /**
+     * @param EntityInterface $entity
+     * @param bool $skipEmptyAttributes
+     * @return array
+     */
+    protected function createFindConditionByEntityKeys(EntityInterface $entity, $skipEmptyAttributes = false): array
+    {
+        $keys = is_array($entity->getPrimaryKey()) ? $entity->getPrimaryKey() : [$entity->getPrimaryKey()];
+
+        $condition = [];
+
+        array_walk($keys, function ($key) use (&$condition, $entity) {
+            $condition[$key] = $entity->{$key};
+        });
+
+        if ($skipEmptyAttributes) {
+            $condition = array_filter($condition);
+        }
+
+        return $condition;
+    }
+}
diff --git a/src/repositories/AbstractCacheRepository.php b/src/repositories/AbstractCacheRepository.php
new file mode 100644
index 00000000..5b64fb13
--- /dev/null
+++ b/src/repositories/AbstractCacheRepository.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace albertborsos\ddd\repositories;
+
+use albertborsos\ddd\interfaces\CacheRepositoryInterface;
+
+/**
+ * Class AbstractRepository
+ * @package albertborsos\ddd\repositories
+ * @since 2.0.0
+ */
+abstract class AbstractCacheRepository extends AbstractRepository implements CacheRepositoryInterface
+{
+    /**
+     * @param string $key
+     * @return string
+     */
+    protected function postfixedKey(string $key): string
+    {
+        return implode('-', [$this->getEntityClass(), $key]);
+    }
+}
diff --git a/src/repositories/AbstractRepository.php b/src/repositories/AbstractRepository.php
new file mode 100644
index 00000000..bd54130a
--- /dev/null
+++ b/src/repositories/AbstractRepository.php
@@ -0,0 +1,79 @@
+<?php
+
+namespace albertborsos\ddd\repositories;
+
+use albertborsos\ddd\interfaces\EntityInterface;
+use albertborsos\ddd\interfaces\HydratorInterface;
+use albertborsos\ddd\interfaces\RepositoryInterface;
+use yii\base\Component;
+use yii\base\InvalidConfigException;
+
+/**
+ * Class AbstractRepository
+ * @package albertborsos\ddd\repositories
+ * @since 2.0.0
+ */
+abstract class AbstractRepository extends Component implements RepositoryInterface
+{
+    /**
+     * The Hydrator class which creates entities from data.
+     *
+     * @var string|HydratorInterface
+     */
+    protected $hydrator = HydratorInterface::class;
+
+    /** @var string */
+    protected $entityClass;
+
+    /**
+     * @throws InvalidConfigException
+     */
+    public function init()
+    {
+        parent::init();
+        $this->validateEntityClass();
+        $this->initHydrator();
+    }
+
+    public function hydrate($data): EntityInterface
+    {
+        return $this->hydrator->hydrate($this->entityClass, $data);
+    }
+
+    public function hydrateInto(EntityInterface $entity, $data): EntityInterface
+    {
+        return $this->hydrator->hydrateInto($entity, $data);
+    }
+
+    public function hydrateAll($models): array
+    {
+        return $this->hydrator->hydrateAll($this->entityClass, $models);
+    }
+
+    /**
+     * @return string
+     */
+    public function getEntityClass(): string
+    {
+        return $this->entityClass;
+    }
+
+    /**
+     * @throws InvalidConfigException
+     */
+    protected function validateEntityClass(): void
+    {
+        if (empty($this->entityClass) || !\Yii::createObject($this->entityClass) instanceof EntityInterface) {
+            throw new InvalidConfigException(get_called_class() . '::$entityClass must implements `' . EntityInterface::class . '`');
+        }
+    }
+
+    protected function initHydrator(): void
+    {
+        $entity = \Yii::createObject($this->entityClass);
+        $this->hydrator = \Yii::createObject($this->hydrator, [$entity->fieldMapping()]);
+        if (!$this->hydrator instanceof HydratorInterface) {
+            throw new InvalidConfigException(get_called_class() . '::$hydrator must implements `' . HydratorInterface::class . '`');
+        }
+    }
+}
diff --git a/src/repositories/CacheRepository.php b/src/repositories/CacheRepository.php
new file mode 100644
index 00000000..6fd2be7a
--- /dev/null
+++ b/src/repositories/CacheRepository.php
@@ -0,0 +1,98 @@
+<?php
+
+namespace albertborsos\ddd\repositories;
+
+use albertborsos\ddd\interfaces\EntityInterface;
+use yii\caching\CacheInterface;
+use yii\data\BaseDataProvider;
+use yii\di\Instance;
+
+class CacheRepository extends AbstractCacheRepository
+{
+    /** @var string|CacheInterface $cache  */
+    protected $cache = 'cache';
+
+    /**
+     * @throws \yii\base\Exception
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function init()
+    {
+        parent::init();
+        $this->cache = Instance::ensure($this->cache, CacheInterface::class);
+    }
+
+    public function get($key)
+    {
+        return $this->cache->get($key);
+    }
+
+    public function set($key, $value, $duration = null, $dependency = null)
+    {
+        return $this->cache->set($key, $value, $duration, $dependency);
+    }
+
+    public function delete($key)
+    {
+        return $this->cache->delete($key);
+    }
+
+    /**
+     * @param $id
+     * @return EntityInterface|null
+     */
+    public function findById($id): ?EntityInterface
+    {
+        /** @var EntityInterface $entity */
+        $entity = $this->hydrate(['id' => $id]);
+
+        return $this->findEntityByKey($entity->getCacheKey());
+    }
+
+    /**
+     * @param EntityInterface $entity
+     * @return EntityInterface|null
+     */
+    public function findByEntity(EntityInterface $entity): ?EntityInterface
+    {
+        return $this->findEntityByKey($entity->getCacheKey());
+    }
+
+    /**
+     * @param string $key
+     * @return EntityInterface|null
+     */
+    public function findEntityByKey(string $key): ?EntityInterface
+    {
+        $data = $this->cache->get($key);
+        if (empty($data)) {
+            return null;
+        }
+
+        return $this->hydrate((array)$data);
+    }
+
+    /**
+     * @param EntityInterface $entity
+     * @param array $keyAttributes
+     * @param null $duration
+     * @param null $dependency
+     * @return bool|mixed
+     */
+    public function storeEntity(EntityInterface $entity, array $keyAttributes = [], $duration = null, $dependency = null)
+    {
+        return $this->set($entity->getCacheKey($keyAttributes), $entity->getDataAttributes(), $duration, $dependency);
+    }
+
+    /**
+     * Creates data provider instance with search query applied
+     *
+     * @param $params
+     * @param null $formName
+     * @return BaseDataProvider
+     */
+    public function search($params, $formName = null): BaseDataProvider
+    {
+        // TODO: Implement search() method.
+    }
+}
diff --git a/src/traits/ActiveFormTrait.php b/src/traits/ActiveFormTrait.php
new file mode 100644
index 00000000..467ceb73
--- /dev/null
+++ b/src/traits/ActiveFormTrait.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace albertborsos\ddd\traits;
+
+use albertborsos\ddd\interfaces\ActiveRepositoryInterface;
+use yii\base\InvalidConfigException;
+
+/**
+ * Trait ActiveFormTrait
+ * @package albertborsos\ddd\traits
+ * @property $dataModelClass
+ * @since 2.0.0
+ */
+trait ActiveFormTrait
+{
+    public function init()
+    {
+        parent::init();
+        $this->repository = \Yii::createObject($this->repository);
+    }
+
+    /**
+     * @param string|null $interface
+     * @return ActiveRepositoryInterface
+     * @throws InvalidConfigException
+     */
+    public function getRepository($interface = null): ActiveRepositoryInterface
+    {
+        if (empty($interface)) {
+            return $this->repository;
+        }
+
+        return \Yii::createObject($interface);
+    }
+}
diff --git a/src/traits/EvaluateAttributesTrait.php b/src/traits/EvaluateAttributesTrait.php
new file mode 100644
index 00000000..60ac3def
--- /dev/null
+++ b/src/traits/EvaluateAttributesTrait.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace albertborsos\ddd\traits;
+
+use albertborsos\ddd\base\EntityEvent;
+use albertborsos\ddd\interfaces\EntityInterface;
+use yii\base\InvalidConfigException;
+
+trait EvaluateAttributesTrait
+{
+    /**
+     * Evaluates the attribute value and assigns it to the current attributes.
+     * @param EntityEvent $event
+     * @throws InvalidConfigException
+     */
+    public function evaluateAttributes($event)
+    {
+        if (!$event instanceof EntityEvent) {
+            throw new InvalidConfigException(get_class($this) . ' must be used with `' . EntityEvent::class . '`');
+        }
+
+        if (
+            $this->skipUpdateOnClean
+            && $event->name == EntityInterface::EVENT_BEFORE_UPDATE
+            && empty($event->dirtyAttributes)
+        ) {
+            return;
+        }
+
+        if (empty($this->attributes[$event->name])) {
+            return;
+        }
+
+        $attributes = (array)$this->attributes[$event->name];
+        $value = $this->getValue($event);
+        foreach ($attributes as $attribute) {
+            // ignore attribute names which are not string (e.g. when set by TimestampBehavior::updatedAtAttribute)
+            if (!is_string($attribute)) {
+                continue;
+            }
+            if ($this->preserveNonEmptyValues && !empty($this->owner->$attribute)) {
+                continue;
+            }
+            $this->owner->$attribute = $value;
+        }
+    }
+}
diff --git a/src/traits/SetContainerDefinitionsTrait.php b/src/traits/SetContainerDefinitionsTrait.php
new file mode 100644
index 00000000..39df01c3
--- /dev/null
+++ b/src/traits/SetContainerDefinitionsTrait.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace albertborsos\ddd\traits;
+
+use Yii;
+use yii\base\Application;
+
+/**
+ * Trait SetContainerDefinitionsTrait
+ * @package albertborsos\ddd\traits
+ * @since 2.0.0
+ */
+trait SetContainerDefinitionsTrait
+{
+    /**
+     * Returns the DI Container definitions map in an array, with key-value pairs.
+     * The keys are the Interface names and the values are the class names of the desired implementation of the interface.
+     *
+     * example:
+     *
+     * ```
+     *  return [
+     *      albertborsos\ddd\interfaces\HydratorInterface::class => albertborsos\ddd\hydrators\ActiveHydrator::class,
+     *  ];
+     * ```
+     *
+     * @return array
+     */
+    abstract protected static function getContainerDefinitions(): array;
+
+    /**
+     * Sets the DI Container definitions for the application.
+     *
+     * @param Application $app
+     * @param bool $overwrite if it is true, then it will overwrite the definition for the existing keys.
+     */
+    protected function setContainerDefinitions(Application $app, $overwrite = false): void
+    {
+        foreach (static::getContainerDefinitions() as $interface => $class) {
+            if (Yii::$container->has($interface) && !$overwrite) {
+                continue;
+            }
+
+            $app->setContainer(['definitions' => [ltrim($interface, '\\') => ltrim($class, '\\')]]);
+        }
+    }
+}
diff --git a/src/web/AbstractActiveController.php b/src/web/AbstractActiveController.php
new file mode 100644
index 00000000..20bd9f22
--- /dev/null
+++ b/src/web/AbstractActiveController.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace albertborsos\ddd\web;
+
+use albertborsos\ddd\interfaces\ActiveRepositoryInterface;
+use albertborsos\ddd\interfaces\EntityInterface;
+use yii\base\InvalidConfigException;
+use yii\web\NotFoundHttpException;
+
+/**
+ * Class AbstractActiveController
+ * @package albertborsos\ddd\web
+ */
+abstract class AbstractActiveController extends \yii\web\Controller
+{
+    /** @var ActiveRepositoryInterface */
+    protected $repository;
+
+    public function init()
+    {
+        parent::init();
+        $this->repository = \Yii::createObject($this->repository);
+    }
+
+    /**
+     * Finds the entity based on its primary key value.
+     * If the entity is not found, a 404 HTTP exception will be thrown.
+     * @param $id
+     * @return EntityInterface|null
+     * @throws InvalidConfigException
+     * @throws NotFoundHttpException
+     */
+    protected function findEntity($id): ?EntityInterface
+    {
+        $entity = $this->getRepository()->findOne($id);
+        if ($entity === null) {
+            throw new NotFoundHttpException('The requested page does not exist.');
+        }
+
+        return $entity;
+    }
+
+    /**
+     * @param string|null $interface
+     * @return ActiveRepositoryInterface
+     * @throws InvalidConfigException
+     */
+    public function getRepository($interface = null): ActiveRepositoryInterface
+    {
+        if (empty($interface)) {
+            return $this->repository;
+        }
+
+        return \Yii::createObject($interface);
+    }
+}
diff --git a/src/web/AbstractCacheController.php b/src/web/AbstractCacheController.php
new file mode 100644
index 00000000..b18ed008
--- /dev/null
+++ b/src/web/AbstractCacheController.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace albertborsos\ddd\web;
+
+use albertborsos\ddd\interfaces\CacheRepositoryInterface;
+use albertborsos\ddd\interfaces\EntityInterface;
+use yii\base\InvalidConfigException;
+use yii\web\NotFoundHttpException;
+
+/**
+ * Class AbstractCacheController
+ * @package albertborsos\ddd\web
+ */
+abstract class AbstractCacheController extends \yii\web\Controller
+{
+    /** @var CacheRepositoryInterface */
+    protected $repository;
+
+    public function init()
+    {
+        parent::init();
+        $this->repository = \Yii::createObject($this->repository);
+    }
+
+    /**
+     * Finds the entity based on its primary key value.
+     * If the entity is not found, a 404 HTTP exception will be thrown.
+     * @param $id
+     * @return EntityInterface|null
+     * @throws InvalidConfigException
+     * @throws NotFoundHttpException
+     */
+    protected function findEntity($id): ?EntityInterface
+    {
+        $entity = $this->getRepository()->findById($id);
+        if ($entity === null) {
+            throw new NotFoundHttpException('The requested page does not exist.');
+        }
+
+        return $entity;
+    }
+
+    /**
+     * @param string|null $interface
+     * @return CacheRepositoryInterface
+     * @throws InvalidConfigException
+     */
+    public function getRepository($interface = null): CacheRepositoryInterface
+    {
+        if (empty($interface)) {
+            return $this->repository;
+        }
+
+        return \Yii::createObject($interface);
+    }
+}
diff --git a/src/web/Controller.php b/src/web/Controller.php
new file mode 100644
index 00000000..55218df7
--- /dev/null
+++ b/src/web/Controller.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace albertborsos\ddd\web;
+
+use albertborsos\ddd\interfaces\ActiveRepositoryInterface;
+use albertborsos\ddd\interfaces\EntityInterface;
+use yii\base\InvalidConfigException;
+use yii\web\NotFoundHttpException;
+
+abstract class Controller extends \yii\web\Controller
+{
+    /** @var RepositoryInterface */
+    protected $repository;
+
+    public function init()
+    {
+        parent::init();
+        $this->repository = \Yii::createObject($this->repository);
+    }
+
+    /**
+     * @param string|null $interface
+     * @return ActiveRepositoryInterface
+     * @throws InvalidConfigException
+     */
+    public function getRepository($interface = null): RepositoryInterface
+    {
+        if (empty($interface)) {
+            return $this->repository;
+        }
+
+        return \Yii::createObject($interface);
+    }
+
+    /**
+     * Finds the entity based on its primary key value.
+     * If the entity is not found, a 404 HTTP exception will be thrown.
+     * @param $id
+     * @return EntityInterface|null
+     * @throws InvalidConfigException
+     * @throws NotFoundHttpException
+     */
+    abstract protected function findEntity(): ?EntityInterface;
+}
diff --git a/tests/_support/AcceptanceTester.php b/tests/_support/AcceptanceTester.php
deleted file mode 100644
index 4c7dcbb6..00000000
--- a/tests/_support/AcceptanceTester.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-
-
-/**
- * Inherited Methods
- * @method void wantToTest($text)
- * @method void wantTo($text)
- * @method void execute($callable)
- * @method void expectTo($prediction)
- * @method void expect($prediction)
- * @method void amGoingTo($argumentation)
- * @method void am($role)
- * @method void lookForwardTo($achieveValue)
- * @method void comment($description)
- * @method \Codeception\Lib\Friend haveFriend($name, $actorClass = NULL)
- *
- * @SuppressWarnings(PHPMD)
-*/
-class AcceptanceTester extends \Codeception\Actor
-{
-    use _generated\AcceptanceTesterActions;
-
-   /**
-    * Define custom actions here
-    */
-}
diff --git a/tests/_support/FunctionalTester.php b/tests/_support/FunctionalTester.php
deleted file mode 100644
index 7e888f8b..00000000
--- a/tests/_support/FunctionalTester.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-
-
-/**
- * Inherited Methods
- * @method void wantToTest($text)
- * @method void wantTo($text)
- * @method void execute($callable)
- * @method void expectTo($prediction)
- * @method void expect($prediction)
- * @method void amGoingTo($argumentation)
- * @method void am($role)
- * @method void lookForwardTo($achieveValue)
- * @method void comment($description)
- * @method \Codeception\Lib\Friend haveFriend($name, $actorClass = NULL)
- *
- * @SuppressWarnings(PHPMD)
-*/
-class FunctionalTester extends \Codeception\Actor
-{
-    use _generated\FunctionalTesterActions;
-
-   /**
-    * Define custom actions here
-    */
-}
diff --git a/tests/_support/UnitTester.php b/tests/_support/UnitTester.php
index 28353572..e19544a5 100644
--- a/tests/_support/UnitTester.php
+++ b/tests/_support/UnitTester.php
@@ -12,7 +12,7 @@
  * @method void am($role)
  * @method void lookForwardTo($achieveValue)
  * @method void comment($description)
- * @method \Codeception\Lib\Friend haveFriend($name, $actorClass = NULL)
+ * @method void pause()
  *
  * @SuppressWarnings(PHPMD)
 */
diff --git a/tests/_support/base/AbstractFormTest.php b/tests/_support/base/AbstractFormTest.php
index 6139e618..00a2aa10 100644
--- a/tests/_support/base/AbstractFormTest.php
+++ b/tests/_support/base/AbstractFormTest.php
@@ -2,26 +2,36 @@
 
 namespace albertborsos\ddd\tests\support\base;
 
+use albertborsos\ddd\interfaces\EntityInterface;
 use Yii;
 
 abstract class AbstractFormTest extends Unit
 {
+    /**
+     * @var string
+     */
     protected $formClass;
-    protected $modelClass;
+
+    /**
+     * @var string
+     * @since 2.0.0
+     */
+    protected $entityClass;
 
     /**
      * @param array $loadParams
-     * @param \albertborsos\ddd\interfaces\BusinessObject|null $businessObject
+     * @param EntityInterface|null $entity
      * @param array $initParams
      * @param bool $isInitParamsAreArguments
      * @return \albertborsos\ddd\interfaces\FormObject|\yii\base\Model
+     * @throws \yii\base\InvalidConfigException
      */
-    protected function mockForm($loadParams = [], \albertborsos\ddd\interfaces\BusinessObject $businessObject = null, $initParams = [], $isInitParamsAreArguments = false)
+    protected function mockForm($loadParams = [], \albertborsos\ddd\interfaces\EntityInterface $entity = null, $initParams = [], $isInitParamsAreArguments = false)
     {
         if ($isInitParamsAreArguments) {
-            $params = $businessObject ? array_merge([$businessObject], $initParams) : $initParams;
+            $params = $entity ? array_merge([$entity], $initParams) : $initParams;
         } else {
-            $params = $businessObject ? [$businessObject, $initParams] : [$initParams];
+            $params = $entity ? [$entity, $initParams] : [$initParams];
         }
 
         /** @var \yii\base\Model|\albertborsos\ddd\interfaces\FormObject $form */
@@ -32,11 +42,14 @@ protected function mockForm($loadParams = [], \albertborsos\ddd\interfaces\Busin
     }
 
     /**
-     * @param $id
-     * @return \yii\db\ActiveRecord
+     * @param $config
+     * @return EntityInterface
+     * @throws \yii\base\InvalidConfigException
      */
-    protected function getModel($id)
+    protected function mockEntity($config)
     {
-        return call_user_func([$this->modelClass, 'findOne'], $id);
+        $entityClass = $this->entityClass ?? $this->modelClass;
+
+        return Yii::createObject($entityClass, [$config]);
     }
 }
diff --git a/tests/_support/base/AbstractServiceTest.php b/tests/_support/base/AbstractServiceTest.php
index 996eb88b..284d9a58 100644
--- a/tests/_support/base/AbstractServiceTest.php
+++ b/tests/_support/base/AbstractServiceTest.php
@@ -2,51 +2,37 @@
 
 namespace albertborsos\ddd\tests\support\base;
 
+use albertborsos\ddd\interfaces\RepositoryInterface;
 use Yii;
 
-abstract class AbstractServiceTest extends Unit
+abstract class AbstractServiceTest extends AbstractFormTest
 {
-    protected $formClass;
+    /**
+     * @var string
+     */
     protected $serviceClass;
-    protected $modelClass;
 
     /**
-     * @param array $loadParams
-     * @param \albertborsos\ddd\interfaces\BusinessObject|null $businessObject
-     * @param array $initParams
-     * @return \albertborsos\ddd\interfaces\FormObject|\yii\base\Model
+     * @var string
      */
-    protected function mockForm($loadParams = [], \albertborsos\ddd\interfaces\BusinessObject $businessObject = null, $initParams = [], $isInitParamsAreArguments = false)
-    {
-        if ($isInitParamsAreArguments) {
-            $params = $businessObject ? array_merge([$businessObject], $initParams) : $initParams;
-        } else {
-            $params = $businessObject ? [$businessObject, $initParams] : [$initParams];
-        }
-
-        /** @var \yii\base\Model|\albertborsos\ddd\interfaces\FormObject $form */
-        $form = Yii::createObject($this->formClass, $params);
-        $form->load($loadParams, '');
-
-        return $form;
-    }
+    protected $repositoryInterface;
 
     /**
      * @param \albertborsos\ddd\interfaces\FormObject $formObject
-     * @param \albertborsos\ddd\interfaces\BusinessObject|null $businessObject
+     * @param \albertborsos\ddd\interfaces\EntityInterface|null $entity
      * @return \albertborsos\ddd\models\AbstractService
      */
-    protected function mockService(\albertborsos\ddd\interfaces\FormObject $formObject, \albertborsos\ddd\interfaces\BusinessObject $businessObject = null)
+    protected function mockService(\albertborsos\ddd\interfaces\FormObject $formObject, \albertborsos\ddd\interfaces\EntityInterface $entity = null)
     {
-        return Yii::createObject($this->serviceClass, [$formObject, $businessObject]);
+        return Yii::createObject($this->serviceClass, [$formObject, $entity]);
     }
 
     /**
-     * @param $id
-     * @return \yii\db\ActiveRecord
+     * @return RepositoryInterface
+     * @throws \yii\base\InvalidConfigException
      */
-    protected function getModel($id)
+    protected function getRepository()
     {
-        return call_user_func([$this->modelClass, 'findOne'], $id);
+        return Yii::createObject($this->repositoryInterface);
     }
 }
diff --git a/tests/_support/base/BootstrapWithDefinitionOverride.php b/tests/_support/base/BootstrapWithDefinitionOverride.php
new file mode 100644
index 00000000..2c1ada57
--- /dev/null
+++ b/tests/_support/base/BootstrapWithDefinitionOverride.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base;
+
+use albertborsos\ddd\Bootstrap;
+
+class BootstrapWithDefinitionOverride extends Bootstrap
+{
+    public function bootstrap($app)
+    {
+        $this->setContainerDefinitions($app, true);
+    }
+}
diff --git a/tests/_support/base/Customer.php b/tests/_support/base/Customer.php
new file mode 100644
index 00000000..81c80ad1
--- /dev/null
+++ b/tests/_support/base/Customer.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base;
+
+use albertborsos\ddd\tests\support\base\CustomerAddress;
+use yii\base\Model;
+
+class Customer extends Model
+{
+    public $id;
+    public $name;
+}
diff --git a/tests/_support/base/InvalidHydrator.php b/tests/_support/base/InvalidHydrator.php
new file mode 100644
index 00000000..ae9ef4b9
--- /dev/null
+++ b/tests/_support/base/InvalidHydrator.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base;
+
+use yii\base\Model;
+
+class InvalidHydrator extends Model
+{
+    public function __construct($map, $config = [])
+    {
+        parent::__construct($config);
+    }
+}
diff --git a/tests/_support/base/MockTrait.php b/tests/_support/base/MockTrait.php
index e81bc561..a2942a4a 100644
--- a/tests/_support/base/MockTrait.php
+++ b/tests/_support/base/MockTrait.php
@@ -40,7 +40,7 @@ private function mockObject(array $config): MockInterface
     {
         $model = \Mockery::mock($config['class'])->makePartial()->shouldAllowMockingProtectedMethods();
 
-        foreach ($config['attributes'] as $attribute => $value) {
+        foreach ($config['attributes'] ?? [] as $attribute => $value) {
             if (!is_array($value)) {
                 $model->$attribute = $value;
                 continue;
@@ -58,7 +58,7 @@ private function mockObject(array $config): MockInterface
             $model->shouldReceive('get' . ucfirst($attribute))->andReturn($returnObjects)->atLeast()->once();
         }
 
-        foreach ($config['settings'] as $method => $returnValue) {
+        foreach ($config['settings'] ?? [] as $method => $returnValue) {
             $model->shouldReceive($method)->andReturn($returnValue)->atLeast()->once();
         }
 
diff --git a/tests/_support/base/StubEntity.php b/tests/_support/base/StubEntity.php
new file mode 100644
index 00000000..0d63161c
--- /dev/null
+++ b/tests/_support/base/StubEntity.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base;
+
+use albertborsos\ddd\models\AbstractEntity;
+use yii\base\Model;
+
+class StubEntity extends AbstractEntity
+{
+    /**
+     * Mapping of property keys to entity classnames.
+     *
+     * @return array
+     */
+    public function relationMapping(): array
+    {
+        return [];
+    }
+}
diff --git a/tests/_support/base/StubbedForm.php b/tests/_support/base/StubForm.php
similarity index 72%
rename from tests/_support/base/StubbedForm.php
rename to tests/_support/base/StubForm.php
index 4bfd3a20..58ed98c9 100644
--- a/tests/_support/base/StubbedForm.php
+++ b/tests/_support/base/StubForm.php
@@ -5,7 +5,7 @@
 use albertborsos\ddd\interfaces\FormObject;
 use yii\base\Model;
 
-class StubbedForm extends Model implements FormObject
+class StubForm extends Model implements FormObject
 {
     public $email;
 }
diff --git a/tests/_support/base/StubbedService.php b/tests/_support/base/StubService.php
similarity index 64%
rename from tests/_support/base/StubbedService.php
rename to tests/_support/base/StubService.php
index 773309c2..36361878 100644
--- a/tests/_support/base/StubbedService.php
+++ b/tests/_support/base/StubService.php
@@ -5,9 +5,9 @@
 use albertborsos\ddd\models\AbstractService;
 use yii\base\Model;
 
-class StubbedService extends AbstractService
+class StubService extends AbstractService
 {
-    public function execute()
+    public function execute(): bool
     {
         $this->setId(1);
         return true;
@@ -25,8 +25,13 @@ public function testGetForm()
         return $this->getForm();
     }
 
-    public function testGetModel()
+    public function testGetEntity()
     {
-        return $this->getModel();
+        return $this->getEntity();
+    }
+
+    public function testGetRepository()
+    {
+        return $this->getRepository();
     }
 }
diff --git a/tests/_support/base/StubbedModel.php b/tests/_support/base/StubbedModel.php
deleted file mode 100644
index 8aebbfc1..00000000
--- a/tests/_support/base/StubbedModel.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-namespace albertborsos\ddd\tests\support\base;
-
-use albertborsos\ddd\interfaces\BusinessObject;
-use yii\base\Model;
-
-class StubbedModel extends Model implements BusinessObject
-{
-
-}
diff --git a/tests/_support/base/Unit.php b/tests/_support/base/Unit.php
index 357c9e2b..8b2b8f59 100644
--- a/tests/_support/base/Unit.php
+++ b/tests/_support/base/Unit.php
@@ -12,4 +12,10 @@ class Unit extends \Codeception\Test\Unit
      * @var \UnitTester Tester
      */
     protected $tester;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->initFixtures();
+    }
 }
diff --git a/tests/_support/base/UserMock.php b/tests/_support/base/UserMock.php
new file mode 100644
index 00000000..08326f0d
--- /dev/null
+++ b/tests/_support/base/UserMock.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base;
+
+use yii\base\BaseObject;
+
+class UserMock extends BaseObject
+{
+    public $id;
+    public $isGuest = true;
+
+    public function login($id)
+    {
+        $this->isGuest = false;
+        $this->id = $id;
+    }
+    public function logout()
+    {
+        $this->isGuest = true;
+        $this->id = null;
+    }
+}
diff --git a/tests/_support/base/domains/customer/cache/CustomerAddressCacheRepository.php b/tests/_support/base/domains/customer/cache/CustomerAddressCacheRepository.php
new file mode 100644
index 00000000..3e210cc7
--- /dev/null
+++ b/tests/_support/base/domains/customer/cache/CustomerAddressCacheRepository.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\cache;
+
+use albertborsos\ddd\repositories\CacheRepository;
+use albertborsos\ddd\tests\support\base\domains\customer\entities\CustomerAddress;
+use albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerAddressCacheRepositoryInterface;
+
+class CustomerAddressCacheRepository extends CacheRepository implements CustomerAddressCacheRepositoryInterface
+{
+    protected $entityClass = CustomerAddress::class;
+}
diff --git a/tests/_support/base/domains/customer/cache/CustomerCacheRepository.php b/tests/_support/base/domains/customer/cache/CustomerCacheRepository.php
new file mode 100644
index 00000000..17c4be28
--- /dev/null
+++ b/tests/_support/base/domains/customer/cache/CustomerCacheRepository.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\cache;
+
+use albertborsos\ddd\repositories\CacheRepository;
+use albertborsos\ddd\tests\support\base\domains\customer\entities\Customer;
+use albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerCacheRepositoryInterface;
+
+class CustomerCacheRepository extends CacheRepository implements CustomerCacheRepositoryInterface
+{
+    const POSTFIX_VIP_CUSTOMERS = 'vip-customers';
+
+    protected $entityClass = Customer::class;
+
+    public function getVipCustomers()
+    {
+        return $this->get($this->postfixedKey(self::POSTFIX_VIP_CUSTOMERS));
+    }
+
+    public function updateVipCustomers($customers)
+    {
+        return $this->set($this->postfixedKey(self::POSTFIX_VIP_CUSTOMERS), $customers);
+    }
+}
diff --git a/tests/_support/base/domains/customer/entities/Customer.php b/tests/_support/base/domains/customer/entities/Customer.php
new file mode 100644
index 00000000..34fd168b
--- /dev/null
+++ b/tests/_support/base/domains/customer/entities/Customer.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\entities;
+
+use albertborsos\ddd\models\AbstractEntity;
+
+/**
+ * Class Customer
+ * @package albertborsos\ddd\tests\support\base\domains\customer\entities
+ */
+class Customer extends AbstractEntity
+{
+    public $id;
+    public $name;
+
+    /** @var CustomerAddress[] */
+    public $customerAddresses;
+
+    public function fields()
+    {
+        return [
+            'id',
+            'name',
+        ];
+    }
+
+    public function extraFields()
+    {
+        return [
+            'customerAddresses',
+        ];
+    }
+
+    /**
+     * Mapping of property keys to entity classnames.
+     *
+     * @return array
+     */
+    public function relationMapping(): array
+    {
+        return [
+            'customerAddresses' => CustomerAddress::class,
+        ];
+    }
+}
diff --git a/tests/_support/base/domains/customer/entities/CustomerAddress.php b/tests/_support/base/domains/customer/entities/CustomerAddress.php
new file mode 100644
index 00000000..c930b385
--- /dev/null
+++ b/tests/_support/base/domains/customer/entities/CustomerAddress.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\entities;
+
+use albertborsos\ddd\models\AbstractEntity;
+
+/**
+ * Class CustomerAddress
+ * @package albertborsos\ddd\tests\support\base\domains\customer\entities
+ */
+class CustomerAddress extends AbstractEntity
+{
+    public $id;
+    public $customerId;
+    public $zipCode;
+    public $city;
+    public $street;
+
+    public function fields()
+    {
+        return [
+            'id',
+            'customerId',
+            'zipCode',
+            'city',
+            'street',
+        ];
+    }
+
+    public function extraFields()
+    {
+        return [];
+    }
+
+    /**
+     * Mapping of property keys to entity classnames.
+     *
+     * @return array
+     */
+    public function relationMapping(): array
+    {
+        return [];
+    }
+}
diff --git a/tests/_support/base/domains/customer/entities/CustomerWithBehaviors.php b/tests/_support/base/domains/customer/entities/CustomerWithBehaviors.php
new file mode 100644
index 00000000..5478aac0
--- /dev/null
+++ b/tests/_support/base/domains/customer/entities/CustomerWithBehaviors.php
@@ -0,0 +1,73 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\entities;
+
+use albertborsos\ddd\behaviors\BlameableBehavior;
+use albertborsos\ddd\behaviors\SluggableBehavior;
+use albertborsos\ddd\behaviors\TimestampBehavior;
+use albertborsos\ddd\models\AbstractEntity;
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\CustomerWithBehaviorsActiveRepository;
+
+/**
+ * Class Customer
+ * @package albertborsos\ddd\tests\support\base\domains\customer\entities
+ */
+class CustomerWithBehaviors extends AbstractEntity
+{
+    public $id;
+    public $name;
+    public $slug;
+    public $createdAt;
+    public $createdBy;
+    public $updatedAt;
+    public $updatedBy;
+
+    /** @var CustomerAddress[] */
+    public $customerAddresses;
+
+    public function behaviors()
+    {
+        return [
+            'timestamp' => TimestampBehavior::class,
+            'blameable' => BlameableBehavior::class,
+            'sluggable' => [
+                'class' => SluggableBehavior::class,
+                'attribute' => 'name',
+                'ensureUnique' => true,
+                'repository' => CustomerWithBehaviorsActiveRepository::class,
+            ],
+        ];
+    }
+
+    public function fields()
+    {
+        return [
+            'id',
+            'name',
+            'slug',
+            'createdAt',
+            'createdBy',
+            'updatedAt',
+            'updatedBy',
+        ];
+    }
+
+    public function extraFields()
+    {
+        return [
+            'customerAddresses',
+        ];
+    }
+
+    /**
+     * Mapping of property keys to entity classnames.
+     *
+     * @return array
+     */
+    public function relationMapping(): array
+    {
+        return [
+            'customerAddresses' => CustomerAddress::class,
+        ];
+    }
+}
diff --git a/tests/_support/base/domains/customer/entities/CustomerWithModifiedBehaviors.php b/tests/_support/base/domains/customer/entities/CustomerWithModifiedBehaviors.php
new file mode 100644
index 00000000..4ffd3934
--- /dev/null
+++ b/tests/_support/base/domains/customer/entities/CustomerWithModifiedBehaviors.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\entities;
+
+use albertborsos\ddd\behaviors\BlameableBehavior;
+use albertborsos\ddd\behaviors\TimestampBehavior;
+use albertborsos\ddd\interfaces\EntityInterface;
+use albertborsos\ddd\models\AbstractEntity;
+
+/**
+ * Class Customer
+ * @package albertborsos\ddd\tests\support\base\domains\customer\entities
+ */
+class CustomerWithModifiedBehaviors extends CustomerWithBehaviors
+{
+    public function behaviors()
+    {
+        return [
+            'timestamp' => [
+                'class' => TimestampBehavior::class,
+                'attributes' => [
+                    EntityInterface::EVENT_BEFORE_INSERT => ['createdAt'],
+                ],
+            ],
+            'blameable' => [
+                'class' => BlameableBehavior::class,
+                'attributes' => [
+                    EntityInterface::EVENT_BEFORE_INSERT => ['createdBy'],
+                ],
+            ],
+        ];
+    }
+}
diff --git a/tests/_support/base/domains/customer/interfaces/CustomerActiveRepositoryInterface.php b/tests/_support/base/domains/customer/interfaces/CustomerActiveRepositoryInterface.php
new file mode 100644
index 00000000..7669e696
--- /dev/null
+++ b/tests/_support/base/domains/customer/interfaces/CustomerActiveRepositoryInterface.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\interfaces;
+
+use albertborsos\ddd\interfaces\ActiveRepositoryInterface;
+
+interface CustomerActiveRepositoryInterface extends ActiveRepositoryInterface
+{
+
+}
diff --git a/tests/_support/base/domains/customer/interfaces/CustomerAddressActiveRepositoryInterface.php b/tests/_support/base/domains/customer/interfaces/CustomerAddressActiveRepositoryInterface.php
new file mode 100644
index 00000000..93bcebd4
--- /dev/null
+++ b/tests/_support/base/domains/customer/interfaces/CustomerAddressActiveRepositoryInterface.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\interfaces;
+
+use albertborsos\ddd\interfaces\ActiveRepositoryInterface;
+
+interface CustomerAddressActiveRepositoryInterface extends ActiveRepositoryInterface
+{
+
+}
diff --git a/tests/_support/base/domains/customer/interfaces/CustomerAddressCacheRepositoryInterface.php b/tests/_support/base/domains/customer/interfaces/CustomerAddressCacheRepositoryInterface.php
new file mode 100644
index 00000000..afbede1a
--- /dev/null
+++ b/tests/_support/base/domains/customer/interfaces/CustomerAddressCacheRepositoryInterface.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\interfaces;
+
+use albertborsos\ddd\interfaces\CacheRepositoryInterface;
+
+interface CustomerAddressCacheRepositoryInterface extends CacheRepositoryInterface
+{
+
+}
diff --git a/tests/_support/base/domains/customer/interfaces/CustomerCacheRepositoryInterface.php b/tests/_support/base/domains/customer/interfaces/CustomerCacheRepositoryInterface.php
new file mode 100644
index 00000000..ae07f61f
--- /dev/null
+++ b/tests/_support/base/domains/customer/interfaces/CustomerCacheRepositoryInterface.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\interfaces;
+
+use albertborsos\ddd\interfaces\CacheRepositoryInterface;
+
+interface CustomerCacheRepositoryInterface extends CacheRepositoryInterface
+{
+    public function getVipCustomers();
+
+    public function updateVipCustomers($customers);
+}
diff --git a/tests/_support/base/domains/customer/mysql/Customer.php b/tests/_support/base/domains/customer/mysql/Customer.php
new file mode 100644
index 00000000..0948d6cd
--- /dev/null
+++ b/tests/_support/base/domains/customer/mysql/Customer.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\mysql;
+
+use albertborsos\ddd\tests\support\base\domains\customer\traits\CustomerAttributeLabelsTrait;
+
+/**
+ * This is the model class for table "{{%customer}}".
+ *
+ * @property int $id
+ * @property string $name
+ * @property string $slug
+ *
+ * @property CustomerAddress[] $customerAddresses
+ */
+class Customer extends \yii\db\ActiveRecord
+{
+    use CustomerAttributeLabelsTrait;
+
+    /**
+     * {@inheritdoc}
+     */
+    public static function tableName()
+    {
+        return '{{%customer}}';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function rules()
+    {
+        return [
+            [['name', 'slug'], 'string', 'max' => 255],
+        ];
+    }
+
+    /**
+     * @return \yii\db\ActiveQuery
+     */
+    public function getCustomerAddresses()
+    {
+        return $this->hasMany(CustomerAddress::className(), ['customer_id' => 'id'])->inverseOf('customer');
+    }
+}
diff --git a/tests/_support/base/domains/customer/mysql/CustomerActiveRepository.php b/tests/_support/base/domains/customer/mysql/CustomerActiveRepository.php
new file mode 100644
index 00000000..27c239fe
--- /dev/null
+++ b/tests/_support/base/domains/customer/mysql/CustomerActiveRepository.php
@@ -0,0 +1,66 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\mysql;
+
+use albertborsos\ddd\repositories\AbstractActiveRepository;
+use mito\cms\core\data\ActiveEntityDataProvider;
+use albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerActiveRepositoryInterface;
+use yii\data\BaseDataProvider;
+
+class CustomerActiveRepository extends AbstractActiveRepository implements CustomerActiveRepositoryInterface
+{
+    protected $dataModelClass = Customer::class;
+
+    protected $entityClass = \albertborsos\ddd\tests\support\base\domains\customer\entities\Customer::class;
+
+    /**
+     * Creates data provider instance with search query applied
+     *
+     * @param array $params
+     *
+     * @param string $formName
+     * @return ActiveEntityDataProvider
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function search($params, $formName = null): BaseDataProvider
+    {
+        $query = $this->find();
+
+        if ($params['expand'] ?? false) {
+            $query->with(explode(',', $params['expand']));
+        }
+
+        // add conditions that should always apply here
+
+        $dataProvider = new ActiveEntityDataProvider([
+            'entityClass' => $this->entityClass,
+            'hydrator' => $this->hydrator,
+            'query' => $query,
+            'pagination' => [
+                'params' => $params,
+            ],
+            'sort' => [
+                'params' => $params,
+            ],
+        ]);
+
+        $model = \Yii::createObject($this->dataModelClass);
+
+        $model->load($params, $formName);
+
+        if (!$model->validate()) {
+            // uncomment the following line if you do not want to return any records when validation fails
+            // $query->where('0=1');
+            return $dataProvider;
+        }
+
+        // grid filtering conditions
+        $query->andFilterWhere([
+            'id' => $model->id,
+        ]);
+
+        $query->andFilterWhere(['like', 'name', $model->name]);
+
+        return $dataProvider;
+    }
+}
diff --git a/tests/_support/base/domains/customer/mysql/CustomerAddress.php b/tests/_support/base/domains/customer/mysql/CustomerAddress.php
new file mode 100644
index 00000000..c72c87a7
--- /dev/null
+++ b/tests/_support/base/domains/customer/mysql/CustomerAddress.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\mysql;
+
+use albertborsos\ddd\tests\support\base\domains\customer\traits\CustomerAddressAttributeLabelsTrait;
+
+/**
+ * This is the model class for table "{{%customer_address}}".
+ *
+ * @property int $id
+ * @property int $customer_id
+ * @property int $zip_code
+ * @property string $city
+ * @property string $street
+ *
+ * @property Customer $customer
+ */
+class CustomerAddress extends \yii\db\ActiveRecord
+{
+    use CustomerAddressAttributeLabelsTrait;
+
+    /**
+     * {@inheritdoc}
+     */
+    public static function tableName()
+    {
+        return '{{%customer_address}}';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function rules()
+    {
+        return [
+            [['customer_id', 'zip_code'], 'integer'],
+            [['city', 'street'], 'string', 'max' => 255],
+            [['customer_id'], 'exist', 'skipOnError' => true, 'targetClass' => Customer::className(), 'targetAttribute' => ['customer_id' => 'id']],
+        ];
+    }
+
+    /**
+     * @return \yii\db\ActiveQuery
+     */
+    public function getCustomer()
+    {
+        return $this->hasOne(Customer::className(), ['id' => 'customer_id'])->inverseOf('customerAddresses');
+    }
+}
diff --git a/tests/_support/base/domains/customer/mysql/CustomerAddressActiveRepository.php b/tests/_support/base/domains/customer/mysql/CustomerAddressActiveRepository.php
new file mode 100644
index 00000000..e4b4d677
--- /dev/null
+++ b/tests/_support/base/domains/customer/mysql/CustomerAddressActiveRepository.php
@@ -0,0 +1,69 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\mysql;
+
+use albertborsos\ddd\repositories\AbstractActiveRepository;
+use mito\cms\core\data\ActiveEntityDataProvider;
+use albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerAddressActiveRepositoryInterface;
+use yii\data\BaseDataProvider;
+
+class CustomerAddressActiveRepository extends AbstractActiveRepository implements CustomerAddressActiveRepositoryInterface
+{
+    protected $dataModelClass = CustomerAddress::class;
+
+    protected $entityClass = \albertborsos\ddd\tests\support\base\domains\customer\entities\CustomerAddress::class;
+
+    /**
+     * Creates data provider instance with search query applied
+     *
+     * @param array $params
+     *
+     * @param string $formName
+     * @return ActiveEntityDataProvider
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function search($params, $formName = null): BaseDataProvider
+    {
+        $query = $this->find();
+
+        if ($params['expand'] ?? false) {
+            $query->with(explode(',', $params['expand']));
+        }
+
+        // add conditions that should always apply here
+
+        $dataProvider = new ActiveEntityDataProvider([
+            'entityClass' => $this->entityClass,
+            'hydrator' => $this->hydrator,
+            'query' => $query,
+            'pagination' => [
+                'params' => $params,
+            ],
+            'sort' => [
+                'params' => $params,
+            ],
+        ]);
+
+        $model = \Yii::createObject($this->dataModelClass);
+
+        $model->load($params, $formName);
+
+        if (!$model->validate()) {
+            // uncomment the following line if you do not want to return any records when validation fails
+            // $query->where('0=1');
+            return $dataProvider;
+        }
+
+        // grid filtering conditions
+        $query->andFilterWhere([
+            'id' => $model->id,
+            'customer_id' => $model->customer_id,
+            'zip_code' => $model->zip_code,
+        ]);
+
+        $query->andFilterWhere(['like', 'city', $model->city])
+            ->andFilterWhere(['like', 'street', $model->street]);
+
+        return $dataProvider;
+    }
+}
diff --git a/tests/_support/base/domains/customer/mysql/CustomerWithBehaviorsActiveRepository.php b/tests/_support/base/domains/customer/mysql/CustomerWithBehaviorsActiveRepository.php
new file mode 100644
index 00000000..c2b57a4d
--- /dev/null
+++ b/tests/_support/base/domains/customer/mysql/CustomerWithBehaviorsActiveRepository.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\mysql;
+
+use albertborsos\ddd\repositories\AbstractActiveRepository;
+use mito\cms\core\data\ActiveEntityDataProvider;
+use albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerActiveRepositoryInterface;
+use yii\data\BaseDataProvider;
+
+class CustomerWithBehaviorsActiveRepository extends CustomerActiveRepository
+{
+    protected $entityClass = \albertborsos\ddd\tests\support\base\domains\customer\entities\CustomerWithBehaviors::class;
+}
diff --git a/tests/_support/base/domains/customer/mysql/CustomerWithModifiedBehaviorsActiveRepository.php b/tests/_support/base/domains/customer/mysql/CustomerWithModifiedBehaviorsActiveRepository.php
new file mode 100644
index 00000000..22be003d
--- /dev/null
+++ b/tests/_support/base/domains/customer/mysql/CustomerWithModifiedBehaviorsActiveRepository.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\mysql;
+
+use albertborsos\ddd\interfaces\EntityInterface;
+use yii\base\ModelEvent;
+
+class CustomerWithModifiedBehaviorsActiveRepository extends CustomerActiveRepository
+{
+    public $fakeEventClass = false;
+
+    protected $entityClass = \albertborsos\ddd\tests\support\base\domains\customer\entities\CustomerWithModifiedBehaviors::class;
+
+    public function beforeSave(bool $insert, EntityInterface $entity, array $dirtyAttributes = [])
+    {
+        if (!$this->fakeEventClass) {
+            return parent::beforeSave($insert, $entity, $dirtyAttributes);
+        }
+
+        $event = new ModelEvent();
+        $entity->trigger($insert ? EntityInterface::EVENT_BEFORE_INSERT : EntityInterface::EVENT_BEFORE_UPDATE, $event);
+
+        return $event->isValid;
+    }
+}
diff --git a/tests/_support/base/domains/customer/mysql/InvalidEntityCustomerActiveRepository.php b/tests/_support/base/domains/customer/mysql/InvalidEntityCustomerActiveRepository.php
new file mode 100644
index 00000000..d5a22e96
--- /dev/null
+++ b/tests/_support/base/domains/customer/mysql/InvalidEntityCustomerActiveRepository.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\mysql;
+
+use albertborsos\ddd\repositories\AbstractActiveRepository;
+use mito\cms\core\data\ActiveEntityDataProvider;
+use albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerActiveRepositoryInterface;
+use yii\base\Model;
+use yii\data\BaseDataProvider;
+
+class InvalidEntityCustomerActiveRepository extends CustomerActiveRepository
+{
+    protected $entityClass = Model::class;
+}
diff --git a/tests/_support/base/domains/customer/mysql/InvalidHydratorCustomerActiveRepository.php b/tests/_support/base/domains/customer/mysql/InvalidHydratorCustomerActiveRepository.php
new file mode 100644
index 00000000..91b29a90
--- /dev/null
+++ b/tests/_support/base/domains/customer/mysql/InvalidHydratorCustomerActiveRepository.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\mysql;
+
+use albertborsos\ddd\repositories\AbstractActiveRepository;
+use albertborsos\ddd\tests\support\base\InvalidHydrator;
+use mito\cms\core\data\ActiveEntityDataProvider;
+use albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerActiveRepositoryInterface;
+use yii\base\Model;
+use yii\data\BaseDataProvider;
+
+class InvalidHydratorCustomerActiveRepository extends CustomerActiveRepository
+{
+    protected $hydrator = InvalidHydrator::class;
+}
diff --git a/tests/_support/base/domains/customer/traits/CustomerAddressAttributeLabelsTrait.php b/tests/_support/base/domains/customer/traits/CustomerAddressAttributeLabelsTrait.php
new file mode 100644
index 00000000..7cc1923c
--- /dev/null
+++ b/tests/_support/base/domains/customer/traits/CustomerAddressAttributeLabelsTrait.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\traits;
+
+use Yii;
+
+trait CustomerAddressAttributeLabelsTrait
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function attributeLabels()
+    {
+        return [
+            'id' => 'ID',
+            'customer_id' => 'Customer ID',
+            'zip_code' => 'Zip Code',
+            'city' => 'City',
+            'street' => 'Street',
+        ];
+    }
+}
diff --git a/tests/_support/base/domains/customer/traits/CustomerAttributeLabelsTrait.php b/tests/_support/base/domains/customer/traits/CustomerAttributeLabelsTrait.php
new file mode 100644
index 00000000..2bb11155
--- /dev/null
+++ b/tests/_support/base/domains/customer/traits/CustomerAttributeLabelsTrait.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\domains\customer\traits;
+
+use Yii;
+
+trait CustomerAttributeLabelsTrait
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function attributeLabels()
+    {
+        return [
+            'id' => 'ID',
+            'name' => 'Name',
+            'slug' => 'Slug',
+        ];
+    }
+}
diff --git a/tests/_support/base/modules/api/Module.php b/tests/_support/base/modules/api/Module.php
new file mode 100644
index 00000000..9a1ecbdd
--- /dev/null
+++ b/tests/_support/base/modules/api/Module.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\modules\admin;
+
+use mito\cms\core\traits\RegisterSubmodulesTrait;
+use yii\base\Application;
+use yii\base\BootstrapInterface;
+
+class Module extends \yii\base\Module implements BootstrapInterface
+{
+    use RegisterSubmodulesTrait;
+
+    /**
+     * Bootstrap method to be called during application bootstrap stage.
+     * @param Application $app the application currently running
+     */
+    public function bootstrap($app)
+    {
+        $this->registerSubModules($app, $this);
+    }
+
+    /**
+     * Returns the submodules to bootstrap in an array with key-value pairs.
+     * The keys are the IDs of the submodules, and the keys are the classnames of the submodules.
+     *
+     * fore example:
+     *
+     * ```
+     *  return [
+     *      'v1' => \albertborsos\ddd\tests\support\base\modules\admin\v1\Module::class,
+     *  ];
+     * ```
+     *
+     * @return array
+     */
+    protected static function getSubModules()
+    {
+        return [
+            'v1' => \albertborsos\ddd\tests\support\base\modules\admin\v1\Module::class,
+        ];
+    }
+}
diff --git a/tests/_support/base/modules/api/v1/Module.php b/tests/_support/base/modules/api/v1/Module.php
new file mode 100644
index 00000000..a8baae84
--- /dev/null
+++ b/tests/_support/base/modules/api/v1/Module.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\modules\api\v1;
+
+class Module extends \yii\base\Module
+{
+
+}
diff --git a/tests/_support/base/modules/api/v1/controllers/CustomerController.php b/tests/_support/base/modules/api/v1/controllers/CustomerController.php
new file mode 100644
index 00000000..307707ad
--- /dev/null
+++ b/tests/_support/base/modules/api/v1/controllers/CustomerController.php
@@ -0,0 +1,118 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\modules\api\v1\controllers;
+
+use albertborsos\rest\active\CreateAction;
+use albertborsos\rest\active\DeleteAction;
+use albertborsos\rest\active\IndexAction;
+use albertborsos\rest\active\UpdateAction;
+use albertborsos\rest\active\ViewAction;
+use yii\rest\OptionsAction;
+use mito\cms\core\rest\api\Controller;
+use albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerActiveRepositoryInterface;
+use albertborsos\ddd\tests\support\base\modules\api\v1\services\customer\forms\CreateCustomerForm;
+use albertborsos\ddd\tests\support\base\modules\api\v1\services\customer\forms\UpdateCustomerForm;
+use albertborsos\ddd\tests\support\base\modules\api\v1\services\customer\forms\DeleteCustomerForm;
+use albertborsos\ddd\tests\support\base\modules\api\v1\services\customer\CreateCustomerService;
+use albertborsos\ddd\tests\support\base\modules\api\v1\services\customer\UpdateCustomerService;
+use albertborsos\ddd\tests\support\base\modules\api\v1\services\customer\DeleteCustomerService;
+
+class CustomerController extends Controller
+{
+    public $repositoryInterface = CustomerActiveRepositoryInterface::class;
+
+    public function actions()
+    {
+        return [
+            'index' => IndexAction::class,
+            'view' => ViewAction::class,
+            'create' => [
+                'class' => CreateAction::class,
+                'formClass' => CreateCustomerForm::class,
+                'serviceClass' => CreateCustomerService::class,
+            ],
+            'update' => [
+                'class' => UpdateAction::class,
+                'formClass' => UpdateCustomerForm::class,
+                'serviceClass' => UpdateCustomerService::class,
+            ],
+            'delete' => [
+                'class' => DeleteAction::class,
+                'formClass' => DeleteCustomerForm::class,
+                'serviceClass' => DeleteCustomerService::class,
+            ],
+            'options' => OptionsAction::class,
+        ];
+    }
+}
+
+/**
+ * @OA\Get(
+ *     path="/api/v1/customers",
+ *     tags={"api/v1/customers"},
+ *     summary="List of available Customers",
+ *     @OA\Parameter(
+ *         in="query",
+ *         name="expand",
+ *         required=false,
+ *         @OA\Items(
+ *             type="string",
+ *             enum={"customerAddresses"},
+ *         ),
+ *     ),
+ *     @OA\Parameter(ref="#/components/parameters/pageSize"),
+ *     @OA\Parameter(ref="#/components/parameters/page"),
+ *     @OA\Response(
+ *         response = 200,
+ *         description = "Successful Response",
+ *         @OA\MediaType(
+ *             mediaType="application/json",
+ *             @OA\Schema(
+ *                 @OA\Property(
+ *                      property="items",
+ *                      type="array",
+ *                      @OA\Items(ref="#/components/schemas/Customer"),
+ *                 ),
+ *                 @OA\Property(
+ *                      property="_meta",
+ *                      ref="#/components/schemas/MetaFields",
+ *                 ),
+ *             ),
+ *         ),
+ *     ),
+ * ),
+ */
+
+/**
+ * @OA\Get(
+ *     path="/api/v1/customers/{id}",
+ *     tags={"api/v1/customers"},
+ *     summary="Find Customer by ID",
+ *     @OA\Parameter(
+ *         in="path",
+ *         name="id",
+ *         required=true,
+ *         @OA\Items(
+ *             type="integer",
+ *             default=1,
+ *         ),
+ *     ),
+ *     @OA\Parameter(
+ *         in="query",
+ *         name="expand",
+ *         required=false,
+ *         @OA\Items(
+ *             type="string",
+ *             enum={"customerAddresses"},
+ *         ),
+ *     ),
+ *     @OA\Response(
+ *         response = 200,
+ *         description = "Successful Response",
+ *         @OA\MediaType(
+ *             mediaType="application/json",
+ *             @OA\Schema(ref="#/components/schemas/Customer"),
+ *         ),
+ *     ),
+ * ),
+ */
diff --git a/tests/_support/base/services/customer/AbstractCustomerService.php b/tests/_support/base/services/customer/AbstractCustomerService.php
new file mode 100644
index 00000000..254208f1
--- /dev/null
+++ b/tests/_support/base/services/customer/AbstractCustomerService.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\services\customer;
+
+use albertborsos\ddd\interfaces\ActiveRepositoryInterface;
+use albertborsos\ddd\models\AbstractActiveService;
+use albertborsos\ddd\tests\support\base\domains\customer\entities\Customer;
+use albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerActiveRepositoryInterface;
+use albertborsos\ddd\tests\support\base\services\customer\forms\AbstractCustomerForm;
+
+abstract class AbstractCustomerService extends AbstractActiveService
+{
+    /** @var string|ActiveRepositoryInterface */
+    protected $repository = CustomerActiveRepositoryInterface::class;
+
+    public function __construct(AbstractCustomerForm $form = null, Customer $model = null, $config = [])
+    {
+        parent::__construct($form, $model, $config);
+    }
+}
diff --git a/tests/_support/base/services/customer/CreateCustomerService.php b/tests/_support/base/services/customer/CreateCustomerService.php
new file mode 100644
index 00000000..77a7ef25
--- /dev/null
+++ b/tests/_support/base/services/customer/CreateCustomerService.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\services\customer;
+
+use albertborsos\ddd\tests\support\base\services\customer\forms\CreateCustomerForm;
+
+class CreateCustomerService extends AbstractCustomerService
+{
+    public function __construct(CreateCustomerForm $form, $config = [])
+    {
+        parent::__construct($form, null, $config);
+    }
+}
diff --git a/tests/_support/base/services/customer/DeleteCustomerService.php b/tests/_support/base/services/customer/DeleteCustomerService.php
new file mode 100644
index 00000000..4a3036a5
--- /dev/null
+++ b/tests/_support/base/services/customer/DeleteCustomerService.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\services\customer;
+
+use albertborsos\ddd\tests\support\base\domains\customer\entities\Customer;
+use albertborsos\ddd\tests\support\base\services\customer\forms\DeleteCustomerForm;
+
+class DeleteCustomerService extends AbstractCustomerService
+{
+    public function __construct(DeleteCustomerForm $form, Customer $model, $config = [])
+    {
+        parent::__construct($form, $model, $config);
+    }
+
+    /**
+     * @return bool
+     */
+    public function execute(): bool
+    {
+        return $this->getRepository()->delete($this->getEntity());
+    }
+}
diff --git a/tests/_support/base/services/customer/UpdateCustomerService.php b/tests/_support/base/services/customer/UpdateCustomerService.php
new file mode 100644
index 00000000..43b658a9
--- /dev/null
+++ b/tests/_support/base/services/customer/UpdateCustomerService.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\services\customer;
+
+use albertborsos\ddd\tests\support\base\domains\customer\entities\Customer;
+use albertborsos\ddd\tests\support\base\services\customer\forms\UpdateCustomerForm;
+
+class UpdateCustomerService extends AbstractCustomerService
+{
+    public function __construct(UpdateCustomerForm $form, Customer $model, $config = [])
+    {
+        parent::__construct($form, $model, $config);
+    }
+}
diff --git a/tests/_support/base/services/customer/forms/AbstractCustomerForm.php b/tests/_support/base/services/customer/forms/AbstractCustomerForm.php
new file mode 100644
index 00000000..1aee0ab2
--- /dev/null
+++ b/tests/_support/base/services/customer/forms/AbstractCustomerForm.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\services\customer\forms;
+
+use albertborsos\ddd\interfaces\ActiveRepositoryInterface;
+use albertborsos\ddd\interfaces\FormObject;
+use albertborsos\ddd\traits\ActiveFormTrait;
+use albertborsos\ddd\tests\support\base\domains\customer\entities\Customer;
+use albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerActiveRepositoryInterface;
+
+abstract class AbstractCustomerForm extends Customer implements FormObject
+{
+    use ActiveFormTrait;
+
+    /** @var string|ActiveRepositoryInterface */
+    protected $repository = CustomerActiveRepositoryInterface::class;
+
+    public function rules()
+    {
+        return [
+            [['name'], 'trim'],
+            [['name'], 'default'],
+            [['name'], 'required'],
+
+            [['name'], 'string', 'max' => 255],
+        ];
+    }
+}
diff --git a/tests/_support/base/services/customer/forms/CreateCustomerForm.php b/tests/_support/base/services/customer/forms/CreateCustomerForm.php
new file mode 100644
index 00000000..a63cc64f
--- /dev/null
+++ b/tests/_support/base/services/customer/forms/CreateCustomerForm.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\services\customer\forms;
+
+class CreateCustomerForm extends AbstractCustomerForm
+{
+    public $customProperty;
+
+    public function rules()
+    {
+        return array_merge(parent::rules(), [
+//            [['customProperty'], 'required'],
+        ]);
+    }
+}
diff --git a/tests/_support/base/services/customer/forms/DeleteCustomerForm.php b/tests/_support/base/services/customer/forms/DeleteCustomerForm.php
new file mode 100644
index 00000000..c7d8c8a5
--- /dev/null
+++ b/tests/_support/base/services/customer/forms/DeleteCustomerForm.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\services\customer\forms;
+
+class DeleteCustomerForm extends AbstractCustomerForm
+{
+    public function rules()
+    {
+        return [];
+    }
+}
diff --git a/tests/_support/base/services/customer/forms/InvalidCreateCustomerForm.php b/tests/_support/base/services/customer/forms/InvalidCreateCustomerForm.php
new file mode 100644
index 00000000..1d03203b
--- /dev/null
+++ b/tests/_support/base/services/customer/forms/InvalidCreateCustomerForm.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\services\customer\forms;
+
+use yii\base\Model;
+
+class InvalidCreateCustomerForm extends CreateCustomerForm
+{
+    protected $repository = Model::class;
+}
diff --git a/tests/_support/base/services/customer/forms/UpdateCustomerForm.php b/tests/_support/base/services/customer/forms/UpdateCustomerForm.php
new file mode 100644
index 00000000..057be20b
--- /dev/null
+++ b/tests/_support/base/services/customer/forms/UpdateCustomerForm.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace albertborsos\ddd\tests\support\base\services\customer\forms;
+
+class UpdateCustomerForm extends AbstractCustomerForm
+{
+    public function rules()
+    {
+        return array_merge(parent::rules(), [
+            // [['name'], 'required'],
+        ]);
+    }
+}
diff --git a/tests/acceptance.suite.yml b/tests/acceptance.suite.yml
deleted file mode 100644
index bb977c48..00000000
--- a/tests/acceptance.suite.yml
+++ /dev/null
@@ -1,12 +0,0 @@
-# Codeception Test Suite Configuration
-#
-# Suite for acceptance tests.
-# Perform tests in browser using the WebDriver or PhpBrowser.
-# If you need both WebDriver and PHPBrowser tests - create a separate suite.
-
-actor: AcceptanceTester
-modules:
-    enabled:
-        - PhpBrowser:
-            url: http://localhost/myapp
-        - \Helper\Acceptance
\ No newline at end of file
diff --git a/tests/bin/yii b/tests/bin/yii
new file mode 100755
index 00000000..bc68139f
--- /dev/null
+++ b/tests/bin/yii
@@ -0,0 +1,23 @@
+#!/usr/bin/env php
+<?php
+/**
+ * Yii console bootstrap file.
+ *
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+defined('YII_DEBUG') or define('YII_DEBUG', true);
+defined('YII_ENV') or define('YII_ENV', 'test');
+require __DIR__ . '/../../vendor/autoload.php';
+require __DIR__ . '/../../vendor/yiisoft/yii2/Yii.php';
+$config = yii\helpers\ArrayHelper::merge(
+    require __DIR__ . '/../config/main.php',
+    [
+        'id' => 'ddd-console',
+        'basePath' => dirname(__DIR__),
+    ]
+);
+$application = new yii\console\Application($config);
+$exitCode = $application->run();
+exit($exitCode);
diff --git a/tests/config/main.local.example b/tests/config/main.local.example
new file mode 100644
index 00000000..8acaf29b
--- /dev/null
+++ b/tests/config/main.local.example
@@ -0,0 +1,11 @@
+<?php
+
+return [
+    'components' => [
+        'db' => [
+            'dsn' => getenv('TEST_DB_DSN'),
+            'username' => getenv('DB_USERNAME'),
+            'password' => getenv('DB_PASSWORD'),
+        ],
+    ],
+];
diff --git a/tests/config/main.php b/tests/config/main.php
new file mode 100644
index 00000000..959e403f
--- /dev/null
+++ b/tests/config/main.php
@@ -0,0 +1,37 @@
+<?php
+
+$config = [
+    'id' => 'ddd-test',
+    'basePath' => dirname(__DIR__),
+    'components' => [
+        'db' => [
+            'class' => \yii\db\Connection::class,
+            'dsn' => getenv('DB_TEST_DSN'),
+            'username' => getenv('DB_USERNAME'),
+            'password' => getenv('DB_PASSWORD'),
+            'charset' => 'utf8',
+        ],
+        'cache' => [
+            'class' => \yii\caching\FileCache::class,
+        ],
+        'user' => \albertborsos\ddd\tests\support\base\UserMock::class,
+    ],
+    'container' => [
+        'definitions' => [
+            \albertborsos\ddd\interfaces\HydratorInterface::class => \albertborsos\ddd\hydrators\ActiveHydrator::class,
+            \albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerActiveRepositoryInterface::class => \albertborsos\ddd\tests\support\base\domains\customer\mysql\CustomerActiveRepository::class,
+            \albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerCacheRepositoryInterface::class => \albertborsos\ddd\tests\support\base\domains\customer\cache\CustomerCacheRepository::class,
+            \albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerAddressActiveRepositoryInterface::class => \albertborsos\ddd\tests\support\base\domains\customer\mysql\CustomerAddressActiveRepository::class,
+            \albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerAddressCacheRepositoryInterface::class => \albertborsos\ddd\tests\support\base\domains\customer\cache\CustomerAddressCacheRepository::class,
+        ],
+    ],
+];
+
+$localConfigFile = dirname(__FILE__) . '/main.local.php';
+
+$localConfig = [];
+if (is_file($localConfigFile)) {
+    $localConfig = require($localConfigFile);
+}
+
+return \yii\helpers\ArrayHelper::merge($config, $localConfig);
diff --git a/tests/fixtures/CustomerFixtures.php b/tests/fixtures/CustomerFixtures.php
new file mode 100644
index 00000000..32082583
--- /dev/null
+++ b/tests/fixtures/CustomerFixtures.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace albertborsos\ddd\tests\fixtures;
+
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\Customer;
+use yii\test\ActiveFixture;
+
+class CustomerFixtures extends ActiveFixture
+{
+    public $modelClass = Customer::class;
+
+    public $dataFile = '@tests/fixtures/data/customer.php';
+}
diff --git a/tests/fixtures/CustomerWithBehaviorsFixtures.php b/tests/fixtures/CustomerWithBehaviorsFixtures.php
new file mode 100644
index 00000000..2669d932
--- /dev/null
+++ b/tests/fixtures/CustomerWithBehaviorsFixtures.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace albertborsos\ddd\tests\fixtures;
+
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\Customer;
+use yii\test\ActiveFixture;
+
+class CustomerWithBehaviorsFixtures extends ActiveFixture
+{
+    public $modelClass = Customer::class;
+
+    public $dataFile = '@tests/fixtures/data/customer-with-behaviors.php';
+}
diff --git a/tests/fixtures/data/customer-with-behaviors.php b/tests/fixtures/data/customer-with-behaviors.php
new file mode 100644
index 00000000..8149ed44
--- /dev/null
+++ b/tests/fixtures/data/customer-with-behaviors.php
@@ -0,0 +1,21 @@
+<?php
+return [
+    [
+        'id' => 1,
+        'name' => 'Albert',
+        'slug' => 'albert',
+        'created_at' => 1,
+        'created_by' => 10,
+        'updated_at' => 1,
+        'updated_by' => 10,
+    ],
+    [
+        'id' => 2,
+        'name' => 'Noncsi',
+        'slug' => 'noncsi',
+        'created_at' => 1,
+        'created_by' => 10,
+        'updated_at' => 2,
+        'updated_by' => 11,
+    ],
+];
diff --git a/tests/fixtures/data/customer.php b/tests/fixtures/data/customer.php
new file mode 100644
index 00000000..763ee86b
--- /dev/null
+++ b/tests/fixtures/data/customer.php
@@ -0,0 +1,11 @@
+<?php
+return [
+    [
+        'id' => 1,
+        'name' => 'Albert',
+    ],
+    [
+        'id' => 2,
+        'name' => 'Noncsi',
+    ],
+];
diff --git a/tests/functional.suite.yml b/tests/functional.suite.yml
deleted file mode 100644
index 94c1fe29..00000000
--- a/tests/functional.suite.yml
+++ /dev/null
@@ -1,12 +0,0 @@
-# Codeception Test Suite Configuration
-#
-# Suite for functional tests
-# Emulate web requests and make application process them
-# Include one of framework modules (Symfony2, Yii2, Laravel5) to use it
-# Remove this suite if you don't use frameworks
-
-actor: FunctionalTester
-modules:
-    enabled:
-        # add a framework module here
-        - \Helper\Functional
\ No newline at end of file
diff --git a/tests/migrations/m190807_151625_add_customer_tables.php b/tests/migrations/m190807_151625_add_customer_tables.php
new file mode 100644
index 00000000..99f52d92
--- /dev/null
+++ b/tests/migrations/m190807_151625_add_customer_tables.php
@@ -0,0 +1,45 @@
+<?php
+
+use yii\db\Schema;
+
+class m190807_151625_add_customer_tables extends \yii\db\Migration
+{
+    const TABLE_NAME_CUSTOMER = 'customer';
+    const TABLE_NAME_CUSTOMER_ADDRESS = 'customer_address';
+    const FK_CUSTOMER_ADDRESS_CUSTOMER_ID_CUSTOMER_ID = 'fk_customer_address_customer_id__customer_id';
+
+    public function up()
+    {
+        $this->createTable(self::TABLE_NAME_CUSTOMER, [
+            'id' => $this->bigPrimaryKey(),
+            'name' => $this->string(),
+            'slug' => $this->string(),
+            'created_at' => $this->bigInteger(),
+            'created_by' => $this->bigInteger(),
+            'updated_at' => $this->bigInteger(),
+            'updated_by' => $this->bigInteger(),
+        ]);
+
+        $this->createTable(self::TABLE_NAME_CUSTOMER_ADDRESS, [
+            'id' => $this->bigPrimaryKey(),
+            'customer_id' => $this->bigInteger(),
+            'zip_code' => $this->integer(),
+            'city' => $this->string(),
+            'street' => $this->string(),
+            'created_at' => $this->bigInteger(),
+            'created_by' => $this->bigInteger(),
+            'updated_at' => $this->bigInteger(),
+            'updated_by' => $this->bigInteger(),
+        ]);
+
+        $this->addForeignKey(self::FK_CUSTOMER_ADDRESS_CUSTOMER_ID_CUSTOMER_ID, self::TABLE_NAME_CUSTOMER_ADDRESS, 'customer_id', self::TABLE_NAME_CUSTOMER, 'id');
+    }
+
+    public function down()
+    {
+        $this->dropForeignKey(self::FK_CUSTOMER_ADDRESS_CUSTOMER_ID_CUSTOMER_ID, self::TABLE_NAME_CUSTOMER_ADDRESS);
+
+        $this->dropTable(self::TABLE_NAME_CUSTOMER_ADDRESS);
+        $this->dropTable(self::TABLE_NAME_CUSTOMER);
+    }
+}
diff --git a/tests/runtime/cache/.gitkeep b/tests/runtime/cache/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/tests/unit.suite.yml b/tests/unit.suite.yml
index 026c91db..143598c6 100644
--- a/tests/unit.suite.yml
+++ b/tests/unit.suite.yml
@@ -3,7 +3,9 @@
 # Suite for unit or integration tests.
 
 actor: UnitTester
+bootstrap: _bootstrap.php
 modules:
     enabled:
         - Asserts
-        - \Helper\Unit
\ No newline at end of file
+        - \Helper\Unit
+
diff --git a/tests/unit/BootstrapTest.php b/tests/unit/BootstrapTest.php
new file mode 100644
index 00000000..77783fdf
--- /dev/null
+++ b/tests/unit/BootstrapTest.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace albertborsos\ddd\tests\unit;
+
+use albertborsos\ddd\Bootstrap;
+use albertborsos\ddd\tests\support\base\BootstrapWithDefinitionOverride;
+use Codeception\PHPUnit\TestCase;
+
+class BootstrapTest extends TestCase
+{
+    public function testBootstrap()
+    {
+        $bootstrap = (new Bootstrap())->bootstrap(\Yii::$app);
+    }
+
+    public function testBootstrapWithOverride()
+    {
+        $bootstrap = (new BootstrapWithDefinitionOverride())->bootstrap(\Yii::$app);
+    }
+}
diff --git a/tests/unit/MockConfigTest.php b/tests/unit/MockConfigTest.php
index fc90647a..c936c4c4 100644
--- a/tests/unit/MockConfigTest.php
+++ b/tests/unit/MockConfigTest.php
@@ -7,7 +7,7 @@ class MockConfigTest extends \Codeception\PHPUnit\TestCase
     public function mockConfigDataProvider()
     {
         return [
-            [\albertborsos\ddd\tests\support\base\StubbedForm::class, ['email' => 'a@b.hu'], ['validate' => true]],
+            [\albertborsos\ddd\tests\support\base\StubForm::class, ['email' => 'a@b.hu'], ['validate' => true]],
         ];
     }
 
diff --git a/tests/unit/MockTraitTest.php b/tests/unit/MockTraitTest.php
index ff04961e..4711f3d9 100644
--- a/tests/unit/MockTraitTest.php
+++ b/tests/unit/MockTraitTest.php
@@ -7,9 +7,10 @@ class MockTraitTest extends \Codeception\PHPUnit\TestCase
     public function mockObjectDataProvider()
     {
         return [
-            'mock form attribute and method' => [\albertborsos\ddd\tests\support\base\StubbedForm::class, ['email' => 'a@b.hu'], ['validate' => true]],
-            'mock service execute method' => [\albertborsos\ddd\tests\support\base\StubbedService::class, [], ['execute' => true]],
-            'mock service with multiple settings' => [\albertborsos\ddd\tests\support\base\StubbedService::class, [], [
+            'mock form attributes only' => [\albertborsos\ddd\tests\support\base\StubForm::class, ['email' => 'a@b.hu'], []],
+            'mock form attribute and method' => [\albertborsos\ddd\tests\support\base\StubForm::class, ['email' => 'a@b.hu'], ['validate' => true]],
+            'mock service execute method' => [\albertborsos\ddd\tests\support\base\StubService::class, [], ['execute' => true]],
+            'mock service with multiple settings' => [\albertborsos\ddd\tests\support\base\StubService::class, [], [
                 'execute' => true,
                 'failedExecute' => false,
             ]],
@@ -26,6 +27,38 @@ public function mockObjectDataProvider()
     public function testCreateMock($mockedClass, $attributes, $settings)
     {
         $mockConfig = \albertborsos\ddd\tests\support\base\MockConfig::create($mockedClass, $attributes, $settings);
+        $this->testMockConfig($mockConfig, $attributes, $settings);
+    }
+
+    /**
+     * @dataProvider mockObjectDataProvider
+     *
+     * @param $mockedClass
+     * @param $attributes
+     * @param $settings
+     */
+    public function testToMockObject($class, $attributes, $settings)
+    {
+        if (!empty($class)) {
+            $mockConfig['class'] = $class;
+        }
+        if (!empty($attributes)) {
+            $mockConfig['attributes'] = $attributes;
+        }
+        if (!empty($settings)) {
+            $mockConfig['settings'] = $settings;
+        }
+
+        $this->testMockConfig($mockConfig, $attributes, $settings);
+    }
+
+    /**
+     * @param $attributes
+     * @param $settings
+     * @param $mockConfig
+     */
+    protected function testMockConfig($mockConfig, $attributes, $settings): void
+    {
         $mockedObject = $this->mockObject($mockConfig);
 
         foreach ($attributes as $attribute => $expectedValue) {
diff --git a/tests/unit/_bootstrap.php b/tests/unit/_bootstrap.php
index af583860..eb6200b5 100644
--- a/tests/unit/_bootstrap.php
+++ b/tests/unit/_bootstrap.php
@@ -3,8 +3,11 @@
 // ensure we get report on all possible php errors
 error_reporting(-1);
 
-define('YII_ENABLE_ERROR_HANDLER', false);
-define('YII_DEBUG', true);
-
 require_once(__DIR__ . '/../../vendor/autoload.php');
 require_once(__DIR__ . '/../../vendor/yiisoft/yii2/Yii.php');
+
+$config = require(__DIR__ . '/../config/main.php');
+
+$app = new \yii\console\Application($config);
+
+Yii::setAlias('@tests', dirname(__DIR__));
diff --git a/tests/unit/behaviors/BlameableBehaviorTest.php b/tests/unit/behaviors/BlameableBehaviorTest.php
new file mode 100644
index 00000000..dec4c8d8
--- /dev/null
+++ b/tests/unit/behaviors/BlameableBehaviorTest.php
@@ -0,0 +1,166 @@
+<?php
+
+namespace albertborsos\ddd\tests\behaviors;
+
+use albertborsos\ddd\repositories\AbstractActiveRepository;
+use albertborsos\ddd\tests\fixtures\CustomerWithBehaviorsFixtures;
+use albertborsos\ddd\tests\support\base\domains\customer\entities\CustomerWithBehaviors;
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\CustomerWithBehaviorsActiveRepository;
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\CustomerWithModifiedBehaviorsActiveRepository;
+use Codeception\PHPUnit\TestCase;
+use yii\test\FixtureTrait;
+
+class BlameableBehaviorTest extends TestCase
+{
+    use FixtureTrait;
+
+    const DEFAULT_USER_ID = 10;
+    const UPDATER_USER_ID = 11;
+
+    public function fixtures()
+    {
+        return [
+            'customers' => CustomerWithBehaviorsFixtures::class,
+        ];
+    }
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->initFixtures();
+    }
+
+    protected function tearDown()
+    {
+        parent::tearDown();
+        $this->logoutUser();
+    }
+
+    public function testInsert()
+    {
+        $this->authenticateUser(self::DEFAULT_USER_ID);
+
+        $data = [
+            'id' => 3,
+            'name' => 'Test blameable attributes are filled on insert',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerWithBehaviorsActiveRepository::class);
+
+        $entity = $repository->hydrate($data);
+        $this->assertTrue($repository->insert($entity));
+
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->findOne($data['id']);
+
+        $this->assertEquals(self::DEFAULT_USER_ID, $entity->createdBy);
+        $this->assertEquals(self::DEFAULT_USER_ID, $entity->updatedBy);
+        $this->assertEquals($entity->createdBy, $entity->updatedBy);
+    }
+
+    public function testInsertWhenUserisGuest()
+    {
+        $data = [
+            'id' => 3,
+            'name' => 'Test blameable attributes are filled on insert',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerWithBehaviorsActiveRepository::class);
+
+        $entity = $repository->hydrate($data);
+        $this->assertTrue($repository->insert($entity));
+
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->findOne($data['id']);
+
+        $this->assertNull($entity->createdBy);
+        $this->assertNull($entity->updatedBy);
+    }
+
+    public function testUpdate()
+    {
+        $this->authenticateUser(self::UPDATER_USER_ID);
+
+        $data = [
+            'id' => 1,
+            'name' => 'Test updatedBy timestamp attribute is modified on update',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerWithBehaviorsActiveRepository::class);
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->findOne($data['id']);
+
+        $oldCreatedBy = $entity->createdBy;
+        $oldUpdatedBy = $entity->updatedBy;
+
+        $entity->setAttributes($data, false);
+        $this->assertTrue($repository->update($entity));
+
+        $entity = $repository->findOne($data['id']);
+
+        $this->assertEquals($oldCreatedBy, $entity->createdBy);
+        $this->assertEquals(self::UPDATER_USER_ID, $entity->updatedBy);
+        $this->assertNotEquals($oldUpdatedBy, $entity->updatedBy);
+    }
+
+    public function testUpdateWhenUserIsGuest()
+    {
+        $data = [
+            'id' => 1,
+            'name' => 'Test updatedBy timestamp attribute is modified on update',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerWithBehaviorsActiveRepository::class);
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->findOne($data['id']);
+
+        $oldCreatedBy = $entity->createdBy;
+        $oldUpdatedBy = $entity->updatedBy;
+
+        $entity->setAttributes($data, false);
+        $this->assertTrue($repository->update($entity));
+
+        $entity = $repository->findOne($data['id']);
+
+        $this->assertEquals($oldCreatedBy, $entity->createdBy);
+        $this->assertNull($entity->updatedBy);
+    }
+
+    public function testEmptyAttributes()
+    {
+        $this->authenticateUser(self::DEFAULT_USER_ID);
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerWithModifiedBehaviorsActiveRepository::class);
+
+        $data = [
+            'id' => 3,
+            'name' => 'test only createdBy',
+        ];
+
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->hydrate($data);
+
+        $this->assertTrue($repository->insert($entity));
+
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->findOne($data['id']);
+
+        $this->assertNotEmpty($entity->createdBy);
+        $this->assertEmpty($entity->updatedBy);
+    }
+
+    private function authenticateUser(int $id)
+    {
+        \Yii::$app->get('user')->login($id);
+    }
+
+    private function logoutUser()
+    {
+        \Yii::$app->get('user')->logout();
+    }
+}
diff --git a/tests/unit/behaviors/SluggableBehaviorTest.php b/tests/unit/behaviors/SluggableBehaviorTest.php
new file mode 100644
index 00000000..d4cf7db7
--- /dev/null
+++ b/tests/unit/behaviors/SluggableBehaviorTest.php
@@ -0,0 +1,110 @@
+<?php
+
+namespace albertborsos\ddd\tests\behaviors;
+
+use albertborsos\ddd\repositories\AbstractActiveRepository;
+use albertborsos\ddd\tests\fixtures\CustomerWithBehaviorsFixtures;
+use albertborsos\ddd\tests\support\base\domains\customer\entities\CustomerWithBehaviors;
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\CustomerWithBehaviorsActiveRepository;
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\CustomerWithModifiedBehaviorsActiveRepository;
+use Codeception\PHPUnit\TestCase;
+use yii\test\FixtureTrait;
+
+class SluggableBehaviorTest extends TestCase
+{
+    use FixtureTrait;
+
+    public function fixtures()
+    {
+        return [
+            'customers' => CustomerWithBehaviorsFixtures::class,
+        ];
+    }
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->initFixtures();
+    }
+
+    public function testInsert()
+    {
+        $data = [
+            'id' => 3,
+            'name' => 'Test slug attribute is filled on insert',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerWithBehaviorsActiveRepository::class);
+
+        $entity = $repository->hydrate($data);
+        $this->assertTrue($repository->insert($entity));
+
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->findOne($data['id']);
+
+        $this->assertNotEmpty($entity->slug);
+    }
+
+    public function testUpdate()
+    {
+        $data = [
+            'id' => 1,
+            'name' => 'Test slug attribute is modified on update',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerWithBehaviorsActiveRepository::class);
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->findOne($data['id']);
+
+        $oldSlug = $entity->slug;
+
+        $entity->setAttributes($data, false);
+        $this->assertTrue($repository->update($entity));
+
+        $entity = $repository->findOne($data['id']);
+
+        $this->assertNotEquals($oldSlug, $entity->slug);
+    }
+
+    public function testUpdateWithoutModification()
+    {
+        $data = [
+            'id' => 1,
+            'name' => 'Albert',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerWithBehaviorsActiveRepository::class);
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->findOne($data['id']);
+
+        $oldSlug = $entity->slug;
+
+        $entity->setAttributes($data, false);
+        $this->assertTrue($repository->update($entity));
+
+        $entity = $repository->findOne($data['id']);
+
+        $this->assertEquals($oldSlug, $entity->slug);
+    }
+
+    public function testUniqueSlug()
+    {
+        $data = [
+            'id' => 3,
+            'name' => 'Albert',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerWithBehaviorsActiveRepository::class);
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->hydrate($data);
+        $this->assertTrue($repository->insert($entity));
+
+        $entity = $repository->findOne($data['id']);
+
+        $this->assertNotEquals('albert', $entity->slug);
+    }
+}
diff --git a/tests/unit/behaviors/TimestampBehaviorTest.php b/tests/unit/behaviors/TimestampBehaviorTest.php
new file mode 100644
index 00000000..a8c134f5
--- /dev/null
+++ b/tests/unit/behaviors/TimestampBehaviorTest.php
@@ -0,0 +1,119 @@
+<?php
+
+namespace albertborsos\ddd\tests\behaviors;
+
+use albertborsos\ddd\repositories\AbstractActiveRepository;
+use albertborsos\ddd\tests\fixtures\CustomerWithBehaviorsFixtures;
+use albertborsos\ddd\tests\support\base\domains\customer\entities\CustomerWithBehaviors;
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\CustomerWithBehaviorsActiveRepository;
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\CustomerWithModifiedBehaviorsActiveRepository;
+use Codeception\PHPUnit\TestCase;
+use yii\test\FixtureTrait;
+
+class TimestampBehaviorTest extends TestCase
+{
+    use FixtureTrait;
+
+    public function fixtures()
+    {
+        return [
+            'customers' => CustomerWithBehaviorsFixtures::class,
+        ];
+    }
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->initFixtures();
+    }
+
+    public function testInsert()
+    {
+        $data = [
+            'id' => 3,
+            'name' => 'Test timestamp attributes are filled on insert',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerWithBehaviorsActiveRepository::class);
+
+        $entity = $repository->hydrate($data);
+        $this->assertTrue($repository->insert($entity));
+
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->findOne($data['id']);
+
+        $this->assertNotEmpty($entity->createdAt);
+        $this->assertNotEmpty($entity->updatedAt);
+        $this->assertEquals($entity->createdAt, $entity->updatedAt);
+    }
+
+    public function testUpdate()
+    {
+        $data = [
+            'id' => 1,
+            'name' => 'Test updatedAt timestamp attribute is modified on update',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerWithBehaviorsActiveRepository::class);
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->findOne($data['id']);
+
+        $oldCreatedAt = $entity->createdAt;
+        $oldUpdatedAt = $entity->updatedAt;
+
+        $entity->setAttributes($data, false);
+        $this->assertTrue($repository->update($entity));
+
+        $entity = $repository->findOne($data['id']);
+
+        $this->assertNotEmpty($entity->updatedAt);
+        $this->assertNotEquals($oldUpdatedAt, $entity->updatedAt);
+        $this->assertNotEmpty($entity->createdAt);
+        $this->assertEquals($oldCreatedAt, $entity->createdAt);
+    }
+
+    public function testEmptyAttributes()
+    {
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerWithModifiedBehaviorsActiveRepository::class);
+
+        $data = [
+            'id' => 3,
+            'name' => 'test only createdAt',
+        ];
+
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->hydrate($data);
+
+        $this->assertTrue($repository->insert($entity));
+
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->findOne($data['id']);
+
+        $this->assertNotEmpty($entity->createdAt);
+        $this->assertEmpty($entity->updatedAt);
+    }
+
+    /**
+     * @expectedException \yii\base\InvalidConfigException
+     * @expectedExceptionMessageRegExp /must be used with `albertborsos\\ddd\\base\\EntityEvent`$/
+     */
+    public function testInvalidEventException()
+    {
+        /** @var CustomerWithModifiedBehaviorsActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerWithModifiedBehaviorsActiveRepository::class);
+        $repository->fakeEventClass = true;
+
+        $data = [
+            'id' => 3,
+            'name' => 'test invalid event exception',
+        ];
+
+        /** @var CustomerWithBehaviors $entity */
+        $entity = $repository->hydrate($data);
+
+        $this->assertTrue($repository->insert($entity));
+    }
+}
diff --git a/tests/unit/data/ActiveEntityDataProviderTest.php b/tests/unit/data/ActiveEntityDataProviderTest.php
new file mode 100644
index 00000000..9652accf
--- /dev/null
+++ b/tests/unit/data/ActiveEntityDataProviderTest.php
@@ -0,0 +1,88 @@
+<?php
+
+namespace albertborsos\ddd\tests\unit\data;
+
+use albertborsos\ddd\data\ActiveEntityDataProvider;
+use albertborsos\ddd\interfaces\HydratorInterface;
+use albertborsos\ddd\tests\fixtures\CustomerFixtures;
+use albertborsos\ddd\tests\support\base\domains\customer\entities\Customer;
+use PHPUnit\Framework\TestCase;
+use yii\base\DynamicModel;
+use yii\test\FixtureTrait;
+
+class ActiveEntityDataProviderTest extends TestCase
+{
+    use FixtureTrait;
+
+    public function fixtures()
+    {
+        return [
+            'customers' => CustomerFixtures::class,
+        ];
+    }
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->initFixtures();
+    }
+
+    public function testReturnsEntities()
+    {
+        $dataProvider = new ActiveEntityDataProvider([
+            'entityClass' => Customer::class,
+            'hydrator' => \Yii::createObject(HydratorInterface::class, [\Yii::createObject([new Customer(), 'fieldMapping'])]),
+            'query' => \albertborsos\ddd\tests\support\base\domains\customer\mysql\Customer::find(),
+        ]);
+
+        foreach ($dataProvider->getModels() as $model) {
+            $this->assertInstanceOf(Customer::class, $model);
+        }
+    }
+
+    /**
+     * @expectedException \yii\base\InvalidConfigException
+     */
+    public function testThrowsErrorIfEntityClassIsMissing()
+    {
+        $dataProvider = new ActiveEntityDataProvider([
+            'entityClass' => null,
+            'hydrator' => \Yii::createObject(HydratorInterface::class, [\Yii::createObject([new Customer(), 'fieldMapping'])]),
+            'query' => \albertborsos\ddd\tests\support\base\domains\customer\mysql\Customer::find(),
+        ]);
+    }
+
+    /**
+     * @expectedException \yii\base\InvalidConfigException
+     */
+    public function testThrowsErrorIfEntityClassNotInstanceOfEntityInterface()
+    {
+        $dataProvider = new ActiveEntityDataProvider([
+            'entityClass' => \albertborsos\ddd\tests\support\base\domains\customer\mysql\Customer::class,
+            'hydrator' => \Yii::createObject(HydratorInterface::class, [\Yii::createObject([new Customer(), 'fieldMapping'])]),
+            'query' => \albertborsos\ddd\tests\support\base\domains\customer\mysql\Customer::find(),
+        ]);
+    }
+
+    public function dataProviderInvalidHydrator()
+    {
+        return [
+            'hydrator is missing (null)' => [null],
+            'hydrator is missing (empty string)' => [''],
+            'hydrator is not instance of HydratorInterface' => [new \yii\base\Model()],
+        ];
+    }
+
+    /**
+     * @dataProvider dataProviderInvalidHydrator
+     * @expectedException \yii\base\InvalidConfigException
+     */
+    public function testThrowsErrorIfHydratorIsMissing($hydrator)
+    {
+        $dataProvider = new ActiveEntityDataProvider([
+            'entityClass' => Customer::class,
+            'hydrator' => $hydrator,
+            'query' => \albertborsos\ddd\tests\support\base\domains\customer\mysql\Customer::find(),
+        ]);
+    }
+}
diff --git a/tests/unit/hydrators/ActiveHydratorTest.php b/tests/unit/hydrators/ActiveHydratorTest.php
new file mode 100644
index 00000000..a4cae54d
--- /dev/null
+++ b/tests/unit/hydrators/ActiveHydratorTest.php
@@ -0,0 +1,268 @@
+<?php
+
+namespace albertborsos\ddd\tests\unit\hydrators;
+
+use albertborsos\ddd\hydrators\ActiveHydrator;
+use albertborsos\ddd\interfaces\EntityInterface;
+use albertborsos\ddd\tests\support\base\domains\customer\entities\Customer;
+use albertborsos\ddd\tests\support\base\domains\customer\entities\CustomerAddress;
+use albertborsos\ddd\tests\support\base\MockTrait;
+use albertborsos\ddd\tests\support\base\Customer as CustomerModel;
+use Codeception\PHPUnit\TestCase;
+use Codeception\Util\Debug;
+use yii\base\DynamicModel;
+use yii\base\Model;
+
+class ActiveHydratorTest extends TestCase
+{
+    use MockTrait;
+
+    public function dataProviderHydrateSingleEntity()
+    {
+        return [
+            'data array' => [Customer::class, ['id' => 'id', 'name' => 'name', 'customerAddresses' => 'customerAddresses'], ['id' => 1, 'name' => 'Name']],
+            'model' => [Customer::class, ['id' => 'id', 'name' => 'name', 'customerAddresses' => 'customerAddresses'], new DynamicModel(['id' => 1, 'name' => 'Name'])],
+            'model with relation data' => [Customer::class, ['id' => 'id', 'name' => 'name', 'customerAddresses' => 'customerAddresses'], new DynamicModel(['id' => 1, 'name' => 'Name', 'customerAddresses' => [
+                ['id' => 1, 'customer_id' => 1, 'zip_code' => 2030, 'city' => 'Érd', 'street' => 'Balatoni út 51.'],
+            ]])],
+            'model with relation model' => [Customer::class, ['id' => 'id', 'name' => 'name', 'customerAddresses' => 'customerAddresses'], new DynamicModel(['id' => 1, 'name' => 'Name', 'customerAddresses' => [
+                new DynamicModel(['id' => 1, 'customer_id' => 1, 'zip_code' => 2030, 'city' => 'Érd', 'street' => 'Balatoni út 51.']),
+            ]])],
+        ];
+    }
+
+    public function dataProviderHydrateIntoObject()
+    {
+        return [
+            'data array' => [Customer::class, ['id' => 'id', 'name' => 'name', 'customerAddresses' => 'customerAddresses'], ['id' => 1, 'name' => 'Name']],
+            'data array with relation' => [Customer::class, ['id' => 'id', 'name' => 'name', 'customerAddresses' => 'customerAddresses'], ['id' => 1, 'name' => 'Name', 'customerAddresses' => [
+                ['id' => 1, 'customer_id' => 1, 'zip_code' => 2030, 'city' => 'Érd', 'street' => 'Balatoni út 51.'],
+            ]]],
+        ];
+    }
+
+    /**
+     * @dataProvider dataProviderHydrateSingleEntity
+     */
+    public function testHydrateSingleEntity($entityClass, $map, $data)
+    {
+        $hydrator = $this->mockHydrator($map);
+
+        /** @var EntityInterface $entity */
+        $entity = $hydrator->hydrate($entityClass, $data);
+
+        $this->assertHydratedEntity($entityClass, $entity, $data);
+    }
+
+    public function dataProviderHydrateSingleModel()
+    {
+        return [
+            'data array' => [CustomerModel::class, ['id' => 'id', 'name' => 'name'], ['id' => 1, 'name' => 'Name']],
+            'model'      => [CustomerModel::class, ['id' => 'id', 'name' => 'name'], new DynamicModel(['id' => 1, 'name' => 'Name'])],
+        ];
+    }
+
+    /**
+     * @dataProvider dataProviderHydrateSingleModel
+     */
+    public function testHydrateSingleModel($modelClass, $map, $data)
+    {
+        $hydrator = $this->mockHydrator($map);
+
+        /** @var Model $model */
+        $model = $hydrator->hydrate($modelClass, $data);
+
+        $this->assertHydratedModel($modelClass, $data, $model);
+    }
+
+    public function dataProviderHydrateMultipleModels()
+    {
+        return [
+            'data array' => [CustomerModel::class, ['id' => 'id', 'name' => 'name'], [
+                ['id' => 1, 'name' => 'Name'],
+                ['id' => 2, 'name' => 'Name'],
+                ['id' => 3, 'name' => 'Name'],
+            ]],
+            'model' => [CustomerModel::class, ['id' => 'id', 'name' => 'name'], [
+                new DynamicModel(['id' => 1, 'name' => 'Name']),
+                new DynamicModel(['id' => 2, 'name' => 'Name']),
+                new DynamicModel(['id' => 3, 'name' => 'Name']),
+            ]],
+        ];
+    }
+
+    /**
+     * @dataProvider dataProviderHydrateMultipleModels
+     */
+    public function testHydrateMultipleModels($modelClass, $map, $data)
+    {
+        $hydrator = $this->mockHydrator($map);
+
+        $models = $hydrator->hydrateAll($modelClass, $data);
+
+        foreach ($data as $i => $modelData) {
+            $this->assertHydratedModel($modelClass, $modelData, $models[$i]);
+        }
+    }
+
+    public function dataProviderHydrateMultipleEntities()
+    {
+        return [
+            'data array' => [Customer::class, ['id' => 'id', 'name' => 'name', 'customerAddresses' => 'customerAddresses'], [
+                ['id' => 1, 'name' => 'Name'],
+                ['id' => 2, 'name' => 'Name'],
+                ['id' => 3, 'name' => 'Name'],
+            ]],
+            'model' => [Customer::class, ['id' => 'id', 'name' => 'name', 'customerAddresses' => 'customerAddresses'], [
+                new DynamicModel(['id' => 1, 'name' => 'Name']),
+                new DynamicModel(['id' => 2, 'name' => 'Name']),
+                new DynamicModel(['id' => 3, 'name' => 'Name']),
+            ]],
+            'model with relation data' => [Customer::class, ['id' => 'id', 'name' => 'name', 'customerAddresses' => 'customerAddresses'], [
+                new DynamicModel(['id' => 1, 'name' => 'Name', 'customerAddresses' => [
+                    ['id' => 1, 'customer_id' => 1, 'zip_code' => 2030, 'city' => 'Érd', 'street' => 'Balatoni út 51.'],
+                ]]),
+                new DynamicModel(['id' => 2, 'name' => 'Name', 'customerAddresses' => [
+                    ['id' => 2, 'customer_id' => 2, 'zip_code' => 2030, 'city' => 'Érd', 'street' => 'Balatoni út 51.'],
+                ]]),
+                new DynamicModel(['id' => 3, 'name' => 'Name', 'customerAddresses' => [
+                    ['id' => 3, 'customer_id' => 3, 'zip_code' => 2030, 'city' => 'Érd', 'street' => 'Balatoni út 51.'],
+                ]]),
+            ]],
+            'model with relation model' => [Customer::class, ['id' => 'id', 'name' => 'name', 'customerAddresses' => 'customerAddresses'], [
+                new DynamicModel(['id' => 1, 'name' => 'Name', 'customerAddresses' => [
+                    new DynamicModel(['id' => 1, 'customer_id' => 1, 'zip_code' => 2030, 'city' => 'Érd', 'street' => 'Balatoni út 51.']),
+                ]]),
+                new DynamicModel(['id' => 2, 'name' => 'Name', 'customerAddresses' => [
+                    new DynamicModel(['id' => 2, 'customer_id' => 2, 'zip_code' => 2030, 'city' => 'Érd', 'street' => 'Balatoni út 51.']),
+                ]]),
+                new DynamicModel(['id' => 3, 'name' => 'Name', 'customerAddresses' => [
+                    new DynamicModel(['id' => 3, 'customer_id' => 3, 'zip_code' => 2030, 'city' => 'Érd', 'street' => 'Balatoni út 51.']),
+                ]]),
+            ]],
+        ];
+    }
+
+    /**
+     * @dataProvider dataProviderHydrateMultipleEntities
+     *
+     * @param $entityClass
+     * @param $map
+     * @param $models
+     * @return array
+     */
+    public function testHydrateMultipleEntities($entityClass, $map, $models)
+    {
+        $hydrator = $this->mockHydrator($map);
+
+        /** @var EntityInterface $entity */
+        $entities = $hydrator->hydrateAll($entityClass, $models);
+
+        foreach ($entities as $i => $entity) {
+            $this->assertHydratedEntity($entityClass, $entity, $models[$i]);
+        }
+    }
+
+    /**
+     * @dataProvider dataProviderHydrateIntoObject
+     *
+     * @param $entityClass
+     * @param $map
+     * @param $data
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function testHydrateInto($entityClass, $map, $data)
+    {
+        $hydrator = $this->mockHydrator($map);
+
+        $model = \Yii::createObject($entityClass);
+        foreach ($data as $attribute => $value) {
+            $this->assertNotEquals($value, $model->$attribute);
+        }
+
+        /** @var EntityInterface $entity */
+        $entity = $hydrator->hydrateInto($model, $data);
+
+        foreach ($data as $attribute => $value) {
+            $this->assertEquals($value, $entity->$attribute);
+        }
+    }
+
+    public function dataProviderExtractHydratedModel()
+    {
+        return [
+            'customer' => [Customer::class, ['id' => 'id', 'name' => 'name'], ['id' => 1, 'name' => 'Name']],
+            'customerAddress' => [CustomerAddress::class, ['id' => 'id', 'customer_id' => 'customerId', 'zip_code' => 'zipCode', 'city' => 'city', 'street' => 'street'], ['id' => 1, 'customer_id' => 1, 'zip_code' => 2030, 'city' => 'Érd', 'street' => 'Balatoni út 51.']],
+        ];
+    }
+
+    /**
+     * @dataProvider dataProviderExtractHydratedModel
+     * @param $entityClass
+     * @param $map
+     * @param $data
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function testExtractHydratedModel($entityClass, $map, $data)
+    {
+        $hydrator = $this->mockHydrator($map);
+
+        $entity = $hydrator->hydrate($entityClass, $data);
+
+        $this->assertEquals($data, $hydrator->extract($entity));
+    }
+
+    /**
+     * @return ActiveHydrator
+     */
+    protected function mockHydrator($map)
+    {
+        return new ActiveHydrator($map);
+    }
+
+    /**
+     * @param $entityClass
+     * @param EntityInterface $entity
+     * @param $data
+     */
+    protected function assertHydratedEntity($entityClass, EntityInterface $entity, $data): void
+    {
+        $this->assertInstanceOf($entityClass, $entity);
+
+        $dataAttributes = $entity->getDataAttributes();
+        $relationAttributes = array_keys($entity->relationMapping());
+
+        $attributes = $data instanceof Model ? $data->attributes : $data;
+
+        foreach ($attributes as $attribute => $expectedValue) {
+            if (in_array($attribute, $relationAttributes) && !is_array($entity->$attribute)) {
+                // on-to-one relation
+                $this->assertInstanceOf($entity->relationMapping()[$attribute], $entity->$attribute);
+            } elseif (in_array($attribute, $relationAttributes) && is_array($entity->$attribute)) {
+                // on-to-many relation
+                foreach ($entity->$attribute as $relationModel) {
+                    $this->assertInstanceOf($entity->relationMapping()[$attribute], $relationModel);
+                }
+            } else {
+                // data property
+                $this->assertEquals($expectedValue, $entity->$attribute);
+            }
+        }
+    }
+
+    /**
+     * @param $modelClass
+     * @param $data
+     * @param Model $model
+     */
+    private function assertHydratedModel($modelClass, $data, Model $model): void
+    {
+        $this->assertInstanceOf($modelClass, $model);
+
+        $attributes = $data instanceof Model ? $data->attributes : $data;
+
+        foreach ($attributes as $attribute => $expectedValue) {
+            $this->assertEquals($expectedValue, $model->$attribute);
+        }
+    }
+}
diff --git a/tests/unit/models/AbstractActiveServiceTest.php b/tests/unit/models/AbstractActiveServiceTest.php
new file mode 100644
index 00000000..f2bdf449
--- /dev/null
+++ b/tests/unit/models/AbstractActiveServiceTest.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace albertborsos\ddd\tests\unit\models;
+
+use albertborsos\ddd\tests\fixtures\CustomerFixtures;
+use albertborsos\ddd\tests\support\base\domains\customer\entities\Customer;
+use albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerActiveRepositoryInterface;
+use albertborsos\ddd\tests\support\base\services\customer\CreateCustomerService;
+use albertborsos\ddd\tests\support\base\services\customer\forms\CreateCustomerForm;
+use Codeception\PHPUnit\TestCase;
+use Codeception\Util\Debug;
+use yii\test\FixtureTrait;
+
+class AbstractActiveServiceTest extends TestCase
+{
+    public function testExecute()
+    {
+        $form = new CreateCustomerForm(['name' => 'Active Customer Service Test']);
+        $service = new CreateCustomerService($form);
+
+        $this->assertTrue($service->execute());
+        $this->assertNotNull($service->getId());
+
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+        /** @var Customer $model */
+        $model = $repository->findOne($service->getId());
+
+        $this->assertInstanceOf(Customer::class, $model);
+        $this->assertEquals('Active Customer Service Test', $model->name);
+    }
+
+    public function testExecuteButModelValidationFails()
+    {
+        $longerThan255Character = \Yii::$app->security->generateRandomString(256);
+        $form = new CreateCustomerForm(['name' => $longerThan255Character]);
+        $service = new CreateCustomerService($form);
+
+        $this->assertFalse($service->execute());
+        $this->assertNull($service->getId());
+        $this->assertCount(1, $form->getErrors());
+        $this->assertArrayHasKey('name', $form->getErrors());
+    }
+}
diff --git a/tests/unit/models/AbstractEntityTest.php b/tests/unit/models/AbstractEntityTest.php
new file mode 100644
index 00000000..9de73c1d
--- /dev/null
+++ b/tests/unit/models/AbstractEntityTest.php
@@ -0,0 +1,182 @@
+<?php
+
+namespace albertborsos\ddd\tests\unit\models;
+
+use albertborsos\ddd\interfaces\EntityInterface;
+use albertborsos\ddd\tests\support\base\domains\customer\entities\Customer;
+use albertborsos\ddd\tests\support\base\domains\customer\entities\CustomerAddress;
+use albertborsos\ddd\tests\support\base\MockTrait;
+use albertborsos\ddd\tests\support\base\services\customer\forms\CreateCustomerForm;
+use Codeception\PHPUnit\TestCase;
+use yii\base\DynamicModel;
+
+class AbstractEntityTest extends TestCase
+{
+    use MockTrait;
+
+    public function testGetPrimaryKey()
+    {
+        $entity = \Yii::createObject(Customer::class);
+
+        $this->assertEquals($entity->getPrimaryKey(), ['id']);
+    }
+
+    public function dataProviderSetPrimaryKey()
+    {
+        return array_merge(
+            $this->dataProviderInvalidPrimaryKeys(),
+            $this->dataProviderValidPrimaryKeys()
+        );
+    }
+
+    public function dataProviderInvalidPrimaryKeys()
+    {
+        return [
+            'no primary key (null)' => [['id' => 1, 'name' => 'Name'], Customer::class, ['getPrimaryKey' => null]],
+            'no primary key (empty string)' => [['id' => 1, 'name' => 'Name'], Customer::class, ['getPrimaryKey' => '']],
+            'no primary key (array with empty string)' => [['id' => 1, 'name' => 'Name'], Customer::class, ['getPrimaryKey' => ['']]],
+            'no primary key (array with null value)' => [['id' => 1, 'name' => 'Name'], Customer::class, ['getPrimaryKey' => [null]]],
+        ];
+    }
+
+    /**
+     * @return array
+     */
+    public function dataProviderValidPrimaryKeys(): array
+    {
+        return [
+            'standard primary key (string)' => [['id' => 1, 'name' => 'Name'], Customer::class, ['getPrimaryKey' => 'id']],
+            'standard primary key (array)' => [['id' => 1, 'name' => 'Name'], Customer::class, ['getPrimaryKey' => ['id']]],
+            'composite key' => [['id' => 1, 'name' => 'Name'], Customer::class, ['getPrimaryKey' => ['id', 'name']]],
+        ];
+    }
+
+    /**
+     * @dataProvider dataProviderSetPrimaryKey
+     */
+    public function testSetPrimaryKey($modelAttributes, $entityClass, $entitySettings)
+    {
+        $model = new DynamicModel($modelAttributes);
+
+        /** @var EntityInterface $entity */
+        $entity = $this->mockObject(['class' => $entityClass, 'settings' => $entitySettings]);
+        $entity->setPrimaryKey($model);
+
+        foreach ($entity->attributes as $attribute => $value) {
+            $isPrimaryKey = in_array($attribute, is_array($entity->getPrimaryKey()) ? $entity->getPrimaryKey() : [$entity->getPrimaryKey()]);
+            $this->assertEquals($isPrimaryKey ? $value : null, $entity->$attribute);
+        }
+    }
+
+    /**
+     * @dataProvider dataProviderInvalidPrimaryKeys
+     * @expectedException \yii\base\InvalidConfigException
+     */
+    public function testCacheKeyWithInvalidPrimaryKeysWillThrowsException($modelAttributes, $entityClass, $entitySettings)
+    {
+        $model = new DynamicModel($modelAttributes);
+        /** @var EntityInterface $entity */
+        $entity = $this->mockObject(['class' => $entityClass, 'settings' => $entitySettings]);
+        $entity->setPrimaryKey($model);
+
+        $entity->getCacheKey();
+    }
+
+    /**
+     * @dataProvider dataProviderValidPrimaryKeys
+     */
+    public function testCacheKey($modelAttributes, $entityClass, $entitySettings)
+    {
+        $model = new DynamicModel($modelAttributes);
+        /** @var EntityInterface $entity */
+        $entity = $this->mockObject(['class' => $entityClass, 'settings' => $entitySettings, 'attributes' => $modelAttributes]);
+        $entity->setPrimaryKey($model);
+
+        $this->assertNotEmpty($entity->getCacheKey());
+        $this->assertNotEquals($entity->getCacheKey(), get_class($entity));
+    }
+
+    /**
+     * @dataProvider dataProviderValidPrimaryKeys
+     */
+    public function testCacheKeyWithCustomKeyAttributes($modelAttributes, $entityClass, $entitySettings)
+    {
+        $model = new DynamicModel($modelAttributes);
+        /** @var EntityInterface $entity */
+        $entity = $this->mockObject(['class' => $entityClass, 'settings' => $entitySettings, 'attributes' => $modelAttributes]);
+        $entity->setPrimaryKey($model);
+
+        $this->assertNotEmpty($entity->getCacheKey(['name']));
+        $this->assertNotEquals($entity->getCacheKey(['name']), get_class($entity));
+        $this->assertNotEquals($entity->getCacheKey(['name']), $entity->getCacheKey());
+    }
+
+    /**
+     * @dataProvider dataProviderValidPrimaryKeys
+     */
+    public function testCacheKeyWithPostfix($modelAttributes, $entityClass, $entitySettings)
+    {
+        $model = new DynamicModel($modelAttributes);
+        /** @var EntityInterface $entity */
+        $entity = $this->mockObject(['class' => $entityClass, 'settings' => $entitySettings, 'attributes' => $modelAttributes]);
+        $entity->setPrimaryKey($model);
+
+        $postfix = 'postfix';
+
+        $this->assertNotEmpty($entity->getCacheKey([], $postfix));
+        $this->assertNotEquals($entity->getCacheKey([], $postfix), get_class($entity));
+        $this->assertNotEquals($entity->getCacheKey([], $postfix), $entity->getCacheKey());
+
+        $this->assertEquals($entity->getCacheKey([], $postfix), implode('_', [$entity->getCacheKey(), $postfix]));
+    }
+
+    public function dataProviderDataAttributes()
+    {
+        return [
+            'Customer Entity' => [Customer::class, [], array_fill_keys(['id', 'name'], null)],
+            'CustomerAddress Entity' => [CustomerAddress::class, [], array_fill_keys(['id', 'customer_id', 'zip_code', 'city', 'street'], null)],
+            'Customer Form with custom property' => [CreateCustomerForm::class, [], array_fill_keys(['id', 'name'], null)],
+        ];
+    }
+
+    /**
+     * @dataProvider dataProviderDataAttributes
+     *
+     * @param $entityClass
+     * @param $entitySettings
+     * @param $expectedDataAttributes
+     */
+    public function testGetDataAttributes($entityClass, $entitySettings, $expectedDataAttributes)
+    {
+        /** @var EntityInterface $entity */
+        $entity = $this->mockObject(['class' => $entityClass, 'settings' => $entitySettings]);
+
+        $this->assertEquals($expectedDataAttributes, $entity->getDataAttributes());
+    }
+
+    /**
+     * @return array
+     */
+    public function dataProviderFieldMapping()
+    {
+        return [
+            'standard fields' => [Customer::class, [], ['id' => 'id', 'name' => 'name', 'customerAddresses' => 'customerAddresses']],
+            'fields with snake_case' => [CustomerAddress::class, [], ['id' => 'id', 'customer_id' => 'customerId', 'zip_code' => 'zipCode', 'city' => 'city', 'street' => 'street']],
+        ];
+    }
+
+    /**
+     * @dataProvider dataProviderFieldMapping
+     *
+     * @param $entityClass
+     * @param $entitySettings
+     * @param $expectedDataAttributes
+     */
+    public function testFieldmapping($entityClass, $entitySettings, $expectedMapping)
+    {
+        /** @var EntityInterface $entity */
+        $entity = $this->mockObject(['class' => $entityClass, 'settings' => $entitySettings]);
+
+        $this->assertEquals($expectedMapping, $entity->fieldMapping());
+    }
+}
diff --git a/tests/unit/models/AbstractServiceTest.php b/tests/unit/models/AbstractServiceTest.php
index 5093afbe..22ee1aec 100644
--- a/tests/unit/models/AbstractServiceTest.php
+++ b/tests/unit/models/AbstractServiceTest.php
@@ -2,74 +2,90 @@
 
 namespace albertborsos\ddd\tests\unit\models;
 
-use albertborsos\ddd\tests\support\base\StubbedForm;
-use albertborsos\ddd\tests\support\base\StubbedModel;
-use albertborsos\ddd\tests\support\base\StubbedService;
+use albertborsos\ddd\tests\support\base\domains\customer\entities\Customer;
+use albertborsos\ddd\tests\support\base\services\customer\CreateCustomerService;
+use albertborsos\ddd\tests\support\base\services\customer\forms\CreateCustomerForm;
+use albertborsos\ddd\tests\support\base\services\customer\forms\UpdateCustomerForm;
+use albertborsos\ddd\tests\support\base\services\customer\UpdateCustomerService;
+use albertborsos\ddd\tests\support\base\StubForm;
+use albertborsos\ddd\tests\support\base\StubEntity;
+use albertborsos\ddd\tests\support\base\StubService;
 use Codeception\PHPUnit\TestCase;
+use Codeception\Util\Debug;
 use yii\base\Model;
 
 class AbstractServiceTest extends TestCase
 {
     /**
+     * @param $serviceClass
      * @param null $form
-     * @param null $model
-     * @return StubbedService
+     * @param null $entity
+     * @return UpdateCustomerService|object
+     * @throws \yii\base\InvalidConfigException
      */
-    public function mockService($form = null, $model = null)
+    public function mockService($serviceClass, $args = [])
     {
-        if (!empty(func_get_args())) {
-            return \Yii::createObject(StubbedService::className(), func_get_args());
+        if (!empty($args)) {
+            return \Yii::createObject($serviceClass, $args);
         }
 
-        return \Yii::createObject(StubbedService::className());
+        return \Yii::createObject($serviceClass);
     }
 
-    public function invalidConstructionDataProvider()
+    public function constructionDataProvider()
     {
         return [
-            'no arguments is valid'   => [[], null],
-            'invalid form interface'  => [[new Model()], 'TypeError'],
-            'invalid model interface' => [[new StubbedForm(), new Model()], 'TypeError'],
-            'valid arguments'         => [[new StubbedForm(), new StubbedModel()], null],
+            'no arguments is valid'          => [StubService::class, [], null],
+            'invalid form interface (model)' => [CreateCustomerService::class, [new Model()], 'TypeError'],
+            'invalid form interface (form)'  => [CreateCustomerService::class, [new UpdateCustomerForm()], 'TypeError'],
+            'invalid entity interface'       => [UpdateCustomerService::class, [new UpdateCustomerForm(), new Model()], 'TypeError'],
+            'valid arguments'                => [UpdateCustomerService::class, [new UpdateCustomerForm(), new Customer()], null],
         ];
     }
 
     /**
-     * @dataProvider invalidConstructionDataProvider
+     * @dataProvider constructionDataProvider
      *
      * @param $constructorArguments
      * @param $expectedException
      */
-    public function testInvalidObjectInitialization($constructorArguments, $expectedException)
+    public function testInvalidObjectInitialization($serviceClass, $constructorArguments, $expectedException)
     {
         if ($expectedException !== null) {
             $this->expectException($expectedException);
         }
-        call_user_func_array([$this, 'mockService'], $constructorArguments);
+        call_user_func_array([$this, 'mockService'], [$serviceClass, $constructorArguments]);
     }
 
     public function testGetFormObject()
     {
-        $mockedForm = new StubbedForm();
-        $service = $this->mockService($mockedForm);
+        $mockedForm = new StubForm();
+        $service = $this->mockService(StubService::class, [$mockedForm]);
 
         $this->assertSame($mockedForm, $service->testGetForm());
     }
 
-    public function testGetModelObject()
+    public function testGetEntityObject()
     {
-        $mockedModel = new StubbedModel();
-        $service = $this->mockService(null, $mockedModel);
+        $mockedEntity = new StubEntity();
+        $service = $this->mockService(StubService::class, [null, $mockedEntity]);
 
-        $this->assertSame($mockedModel, $service->testGetModel());
+        $this->assertSame($mockedEntity, $service->testGetEntity());
+    }
+
+    public function testGetRepository()
+    {
+        $service = $this->mockService(StubService::class);
+
+        $this->assertNull($service->testGetRepository());
     }
 
     public function testExecuteOk()
     {
-        $mockedForm = new StubbedForm();
-        $mockedModel = new StubbedModel();
+        $mockedForm = new StubForm();
+        $mockedModel = new StubEntity();
 
-        $service = $this->mockService($mockedForm, $mockedModel);
+        $service = $this->mockService(StubService::class, [$mockedForm, $mockedModel]);
 
         $this->assertNull($service->getId());
         $this->assertTrue($service->execute());
@@ -79,10 +95,10 @@ public function testExecuteOk()
 
     public function testExecuteFailed()
     {
-        $mockedForm = new StubbedForm();
-        $mockedModel = new StubbedModel();
+        $mockedForm = new StubForm();
+        $mockedModel = new StubEntity();
 
-        $service = $this->mockService($mockedForm, $mockedModel);
+        $service = $this->mockService(StubService::class, [$mockedForm, $mockedModel]);
 
         $this->assertEmpty($mockedForm->errors);
         $this->assertNull($service->getId());
diff --git a/tests/unit/repositories/AbstractActiveRepositoryTest.php b/tests/unit/repositories/AbstractActiveRepositoryTest.php
new file mode 100644
index 00000000..559250c5
--- /dev/null
+++ b/tests/unit/repositories/AbstractActiveRepositoryTest.php
@@ -0,0 +1,350 @@
+<?php
+
+namespace albertborsos\ddd\tests\repositories;
+
+use albertborsos\ddd\repositories\AbstractActiveRepository;
+use albertborsos\ddd\tests\fixtures\CustomerFixtures;
+use albertborsos\ddd\tests\support\base\Customer;
+use albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerActiveRepositoryInterface;
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\CustomerActiveRepository;
+use albertborsos\ddd\tests\support\base\MockConfig;
+use albertborsos\ddd\tests\support\base\MockTrait;
+use albertborsos\ddd\tests\support\base\services\customer\CreateCustomerService;
+use albertborsos\ddd\tests\support\base\services\customer\forms\CreateCustomerForm;
+use Codeception\PHPUnit\TestCase;
+use Codeception\Util\Debug;
+use yii\base\Exception;
+use yii\db\ActiveQueryInterface;
+use yii\db\Transaction;
+use yii\test\FixtureTrait;
+
+class AbstractActiveRepositoryTest extends TestCase
+{
+    use MockTrait;
+    use FixtureTrait;
+
+    public function fixtures()
+    {
+        return [
+            'customers' => CustomerFixtures::class,
+        ];
+    }
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->initFixtures();
+    }
+
+    public function invalidDataModelClassDataProvider()
+    {
+        return [
+            'dataModelClass is null' => [CustomerActiveRepository::class, null],
+            'dataModelClass is empty string' => [CustomerActiveRepository::class, ''],
+            'dataModelClass is not implementing ActiveRecordInterface' => [CustomerActiveRepository::class, Customer::class],
+        ];
+    }
+
+    /**
+     * @dataProvider invalidDataModelClassDataProvider
+     * @expectedException \yii\base\InvalidConfigException
+     * @expectedExceptionMessageRegExp  /\$dataModelClass must implements `yii\\db\\ActiveRecordInterface`$/
+     */
+    public function testMissingDataModelClass($repositoryClass, $dataModelClass)
+    {
+        $this->mockObject(MockConfig::create($repositoryClass, ['dataModelClass' => $dataModelClass]));
+    }
+
+    public function testFind()
+    {
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+
+        $this->assertInstanceOf(ActiveQueryInterface::class, $repository->find());
+    }
+
+    public function testFindOne()
+    {
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+
+        $fixtureId = $this->getFixture('customers')[0]['id'];
+
+        $this->assertInstanceOf(\albertborsos\ddd\tests\support\base\domains\customer\entities\Customer::class, $repository->findOne($fixtureId));
+    }
+
+    public function testFindAll()
+    {
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+
+        $fixtureId = $this->getFixture('customers')[0]['id'];
+
+        $entities = $repository->findAll(['id' => $fixtureId]);
+        $this->assertCount(1, $entities);
+
+        foreach ($entities as $entity) {
+            $this->assertInstanceOf(\albertborsos\ddd\tests\support\base\domains\customer\entities\Customer::class, $entity);
+        }
+    }
+
+    public function saveDataProvider()
+    {
+        return [
+            'create customer' => [true, CustomerActiveRepositoryInterface::class, ['id' => 4, 'name' => 'Test to Save via repository']],
+            'update customer' => [false, CustomerActiveRepositoryInterface::class, ['id' => 1, 'name' => 'Test to Save via repository']],
+        ];
+    }
+
+    /**
+     * @dataProvider saveDataProvider
+     *
+     * @param $isNewRecord
+     * @param $repositoryClass
+     * @param $data
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function testSave($isNewRecord, $repositoryClass, $data)
+    {
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject($repositoryClass);
+
+        $entity = $repository->findOne($data['id']);
+        if ($isNewRecord) {
+            $this->assertNull($entity);
+        } else {
+            $this->assertInstanceOf($repository->getEntityClass(), $entity);
+        }
+
+        $entity = $repository->hydrate($data);
+        $this->assertTrue($repository->save($entity));
+
+        $entity = $repository->findOne($data['id']);
+        $this->assertInstanceOf($repository->getEntityClass(), $entity);
+
+        foreach ($entity->fields() as $attribute) {
+            $this->assertEquals($data[$attribute], $entity->$attribute);
+        }
+    }
+
+    public function testInsert()
+    {
+        $data = [
+            'id' => 5,
+            'name' => 'Test to Insert via repository',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+
+        $entity = $repository->hydrate($data);
+        $this->assertTrue($repository->insert($entity));
+
+        $entity = $repository->findOne($data['id']);
+        $this->assertInstanceOf($repository->getEntityClass(), $entity);
+
+        foreach ($entity->fields() as $attribute) {
+            $this->assertEquals($data[$attribute], $entity->$attribute);
+        }
+    }
+
+    /**
+     * @expectedException \yii\base\InvalidArgumentException
+     */
+    public function testCallUpdateForNonExistingRecord()
+    {
+        $data = [
+            'id' => 6,
+            'name' => 'Test to Update via repository',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+
+        $entity = $repository->hydrate($data);
+        $repository->update($entity);
+    }
+
+    /**
+     * @expectedException \yii\base\InvalidArgumentException
+     */
+    public function testCallInsertForExistingRecord()
+    {
+        $data = [
+            'id' => 1,
+            'name' => 'Test to Insert via repository',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+
+        $entity = $repository->hydrate($data);
+        $repository->insert($entity);
+    }
+
+    public function testUpdate()
+    {
+        $data = [
+            'id' => 1,
+            'name' => 'Test to Update via repository',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+
+        /** @var \albertborsos\ddd\tests\support\base\domains\customer\entities\Customer $entity */
+        $entity = $repository->findOne($data['id']);
+        $entity->setAttributes($data, false);
+
+        $this->assertTrue($repository->update($entity));
+
+        $entity = $repository->findOne($data['id']);
+        $this->assertInstanceOf($repository->getEntityClass(), $entity);
+
+        foreach ($entity->fields() as $attribute) {
+            $this->assertEquals($data[$attribute], $entity->$attribute);
+        }
+    }
+
+    public function testUpdateWithNoModification()
+    {
+        $data = [
+            'id' => 1,
+            'name' => 'Albert',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+
+        $entity = $repository->hydrate($data);
+        $this->assertTrue($repository->update($entity));
+
+        $entity = $repository->findOne($data['id']);
+        $this->assertInstanceOf($repository->getEntityClass(), $entity);
+
+        foreach ($entity->fields() as $attribute) {
+            $this->assertEquals($data[$attribute], $entity->$attribute);
+        }
+    }
+
+    public function deleteExistingRecordDataProvider()
+    {
+        return [
+            'delete existing customer' => [CustomerActiveRepositoryInterface::class, 1],
+        ];
+    }
+
+    /**
+     * @dataProvider deleteExistingRecordDataProvider
+     *
+     * @param $isNewRecord
+     * @param $repositoryClass
+     * @param $data
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function testDeleteExistingRecord($repositoryClass, $recordId)
+    {
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject($repositoryClass);
+        $entity = $repository->findOne($recordId);
+
+        $this->assertInstanceOf($repository->getEntityClass(), $entity);
+        $this->assertTrue($repository->delete($entity));
+
+        $this->assertNull($repository->findOne($recordId));
+    }
+
+    /**
+     * @expectedException TypeError
+     *
+     * @param $isNewRecord
+     * @param $repositoryClass
+     * @param $data
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function testDeleteNotExistingRecord()
+    {
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+        $entity = $repository->findOne(4);
+
+        $this->assertNull($entity);
+        $repository->delete($entity);
+    }
+
+    /**
+     * @param $isNewRecord
+     * @param $repositoryClass
+     * @param $data
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function testDeleteEmptyEntity()
+    {
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+        $entity = $repository->hydrate([]);
+
+        $this->assertFalse($repository->delete($entity));
+    }
+
+    public function testBeginTransaction()
+    {
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+        $transaction = $repository->beginTransaction();
+        $this->assertNotNull($transaction);
+        $this->assertTrue($transaction->isActive);
+
+        $transaction->rollBack();
+    }
+
+    public function testTransactionCommit()
+    {
+        $attributes = [
+            'name' => 'Transaction Commit',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+        $transaction = $repository->beginTransaction();
+
+        try {
+            $this->assertEmpty($repository->findOne($attributes));
+            $form = new CreateCustomerForm($attributes);
+            $this->assertTrue($form->validate());
+            $service = new CreateCustomerService($form);
+            $this->assertTrue($service->execute());
+            $this->assertInstanceOf(\albertborsos\ddd\tests\support\base\domains\customer\entities\Customer::class, $repository->findOne($attributes));
+            $transaction->commit();
+        } catch (Exception $e) {
+            return false;
+        }
+
+        $entity = $repository->findOne($attributes);
+        $this->assertInstanceOf(\albertborsos\ddd\tests\support\base\domains\customer\entities\Customer::class, $entity);
+
+        $repository->delete($entity);
+    }
+
+    public function testTransactionRollback()
+    {
+        $attributes = [
+            'name' => 'Transaction Rollback',
+        ];
+
+        /** @var AbstractActiveRepository $repository */
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+        $transaction = $repository->beginTransaction();
+
+        try {
+            $this->assertEmpty($repository->findOne($attributes));
+            $form = new CreateCustomerForm($attributes);
+            $this->assertTrue($form->validate());
+            $service = new CreateCustomerService($form);
+            $this->assertTrue($service->execute());
+            $this->assertInstanceOf(\albertborsos\ddd\tests\support\base\domains\customer\entities\Customer::class, $repository->findOne($attributes));
+
+            throw new Exception('rollback');
+        } catch (Exception $e) {
+            $transaction->rollBack();
+            $this->assertEmpty($repository->findOne($attributes));
+        }
+    }
+}
diff --git a/tests/unit/repositories/AbstractRepositoryTest.php b/tests/unit/repositories/AbstractRepositoryTest.php
new file mode 100644
index 00000000..2eb2f8a0
--- /dev/null
+++ b/tests/unit/repositories/AbstractRepositoryTest.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace albertborsos\ddd\tests\repositories;
+
+use albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerActiveRepositoryInterface;
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\CustomerActiveRepository;
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\InvalidCustomerActiveRepository;
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\InvalidEntityCustomerActiveRepository;
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\InvalidHydratorCustomerActiveRepository;
+use albertborsos\ddd\tests\support\base\MockConfig;
+use albertborsos\ddd\tests\support\base\MockTrait;
+use Codeception\PHPUnit\TestCase;
+
+class AbstractRepositoryTest extends TestCase
+{
+    use MockTrait;
+
+    public function testHydrateInto()
+    {
+        $repository = \Yii::createObject(CustomerActiveRepositoryInterface::class);
+
+        $entity = $repository->hydrate([]);
+
+        $data = ['id' => 9, 'name' => 'hydrate into'];
+        $hydratedEntity = $repository->hydrateInto($entity, $data);
+
+        foreach ($data as $attribute => $value) {
+            $this->assertEquals($value, $hydratedEntity->$attribute);
+        }
+    }
+
+    /**
+     * @expectedException \yii\base\InvalidConfigException
+     * @expectedExceptionMessageRegExp /\$entityClass must implements `albertborsos\\ddd\\interfaces\\EntityInterface`$/
+     */
+    public function testInvalidEntityClass()
+    {
+        \Yii::createObject(InvalidEntityCustomerActiveRepository::class);
+    }
+
+    /**
+     * @expectedException \yii\base\InvalidConfigException
+     * @expectedExceptionMessageRegExp /\$hydrator must implements `albertborsos\\ddd\\interfaces\\HydratorInterface`$/
+     */
+    public function testInvalidHydratorClass()
+    {
+        new InvalidHydratorCustomerActiveRepository();
+    }
+}
diff --git a/tests/unit/repositories/CacheRepositoryTest.php b/tests/unit/repositories/CacheRepositoryTest.php
new file mode 100644
index 00000000..60c26c79
--- /dev/null
+++ b/tests/unit/repositories/CacheRepositoryTest.php
@@ -0,0 +1,99 @@
+<?php
+
+namespace albertborsos\ddd\tests\repositories;
+
+use albertborsos\ddd\tests\support\base\domains\customer\interfaces\CustomerCacheRepositoryInterface;
+use albertborsos\ddd\tests\support\base\MockTrait;
+use Codeception\PHPUnit\TestCase;
+
+class CacheRepositoryTest extends TestCase
+{
+    use MockTrait;
+
+    public function testPostfixedKey()
+    {
+        $customerIds = [1, 2, 3];
+
+        $repository = \Yii::createObject(CustomerCacheRepositoryInterface::class);
+        $repository->updateVipCustomers($customerIds);
+
+        $this->assertEquals($customerIds, $repository->getVipCustomers());
+    }
+
+    public function testSetAndGetAndDelete()
+    {
+        $repository = \Yii::createObject(CustomerCacheRepositoryInterface::class);
+
+        $key = 'test-key';
+        $value = 'test-value';
+
+        $this->assertTrue($repository->set($key, $value));
+        $this->assertEquals($value, $repository->get($key));
+        $this->assertTrue($repository->delete($key));
+        $this->assertNotEquals($value, $repository->get($key));
+        $this->assertFalse($repository->get($key));
+    }
+
+    public function entityDataProvider()
+    {
+        return [
+            'customer' => [['id' => 1, 'name' => 'Albert']],
+        ];
+    }
+
+    /**
+     * @dataProvider entityDataProvider
+     * @param $data
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function testFindByEntity($data)
+    {
+        $repository = \Yii::createObject(CustomerCacheRepositoryInterface::class);
+
+        $customer = $repository->hydrate($data);
+
+        $repository->storeEntity($customer);
+
+        $this->assertEquals($customer, $repository->findByEntity($customer));
+
+        $this->assertTrue($repository->delete($customer->getCacheKey()));
+        $this->assertEmpty($repository->findByEntity($customer));
+    }
+
+    /**
+     * @dataProvider entityDataProvider
+     * @param $data
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function testFindById($data)
+    {
+        $repository = \Yii::createObject(CustomerCacheRepositoryInterface::class);
+
+        $customer = $repository->hydrate($data);
+
+        $repository->storeEntity($customer);
+
+        $this->assertEquals($customer, $repository->findById($data['id']));
+
+        $this->assertTrue($repository->delete($customer->getCacheKey()));
+        $this->assertEmpty($repository->findById($data['id']));
+    }
+
+    /**
+     * @dataProvider entityDataProvider
+     * @param $data
+     * @throws \yii\base\InvalidConfigException
+     */
+    public function testFindEntityByKey($data)
+    {
+        $repository = \Yii::createObject(CustomerCacheRepositoryInterface::class);
+
+        $customer = $repository->hydrate($data);
+
+        $repository->storeEntity($customer);
+
+        $this->assertEquals($customer, $repository->findEntityByKey($customer->getCacheKey()));
+        $this->assertTrue($repository->delete($customer->getCacheKey()));
+        $this->assertEmpty($repository->findEntityByKey($customer->getCacheKey()));
+    }
+}
diff --git a/tests/unit/traits/ActiveFormTraitTest.php b/tests/unit/traits/ActiveFormTraitTest.php
new file mode 100644
index 00000000..9d48a70b
--- /dev/null
+++ b/tests/unit/traits/ActiveFormTraitTest.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace albertborsos\ddd\tests\unit\traits;
+
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\CustomerActiveRepository;
+use albertborsos\ddd\tests\support\base\domains\customer\mysql\CustomerAddressActiveRepository;
+use albertborsos\ddd\tests\support\base\services\customer\forms\CreateCustomerForm;
+use albertborsos\ddd\tests\support\base\services\customer\forms\InvalidCreateCustomerForm;
+use Codeception\PHPUnit\TestCase;
+
+class ActiveFormTraitTest extends TestCase
+{
+    /**
+     * @expectedException TypeError
+     */
+    public function testInvalidRepositoryClass()
+    {
+        $form = new InvalidCreateCustomerForm();
+        $form->getRepository();
+    }
+
+    public function testGetRepository()
+    {
+        $form = new CreateCustomerForm();
+        $this->assertInstanceOf(CustomerActiveRepository::class, $form->getRepository());
+
+        $this->assertInstanceOf(CustomerAddressActiveRepository::class, $form->getRepository(CustomerAddressActiveRepository::class));
+    }
+}