Use in-memory sqlite DB for integration test

REF:
https://stackoverflow.com/questions/52306014/how-to-test-a-laravel-package-that-handles-eloquent-models

composer.json

@@ -12,7 +12,8 @@
     "homepage": "https://github.com/alariva/laravel-modelmerge",
     "keywords": ["Laravel", "ModelMerge"],
     "require": {
-        "illuminate/support": "~5"
+        "illuminate/support": "~5",
+        "illuminate/database": "~5"
     },
     "require-dev": {
         "phpunit/phpunit": "~6.0",

tests/BaseTestCase.php

@@ -3,10 +3,39 @@
 namespace Tests;
 
 use Alariva\ModelMerge\ModelMergeServiceProvider;
+use Illuminate\Database\Capsule\Manager as Capsule;
+use Illuminate\Database\Schema\Blueprint;
 use Orchestra\Testbench\TestCase as OrchestraTestCase;
 
 abstract class BaseTestCase extends OrchestraTestCase
 {
+
+    protected function setUp()
+    {
+        parent::setUp();
+
+        $capsule = new Capsule;
+
+        $capsule->addConnection([
+            'driver' => 'sqlite',
+            'database' => ':memory:'
+        ]);
+
+        $capsule->setAsGlobal();
+        $capsule->bootEloquent();
+
+        Capsule::schema()->create('dummy_contacts', function (Blueprint $table) {
+            $table->increments('id');
+            $table->string('firstname');
+            $table->string('lastname');
+            $table->string('age')->nullable();
+            $table->string('eyes')->nullable();
+            $table->string('phone')->nullable();
+            $table->string('address')->nullable();
+            $table->timestamps();
+        });
+    }
+
     /**
      * Load package service provider
      *

tests/DummyContact.php

@@ -15,16 +15,4 @@ class DummyContact extends Model
     protected $hidden = ['id'];
 
     protected $dates = ['created_at', 'deleted_at'];
-
-    public function save(array $options = [])
-    {
-        $this->exists = true;
-        $this->wasRecentlyCreated = true;
-    }
-
-    public function delete()
-    {
-        $this->exists = false;
-        $this->wasRecentlyCreated = false;
-    }
 }