Mock WordPress

Reusable WordPress mocks and test utilities for unit testing WordPress plugins and themes without requiring a full WordPress installation.

Namespace: ksfraser\MockWordPress\
Requirement: PHP 7.3+

Features

• WordPress Function Mocks (WordPressFunctions) - Core WordPress functions like get_option(), get_post_meta(), etc.
• Hook System Mock (WordPressHooks) - Register and track add_action(), add_filter(), do_action(), apply_filters()
• Database Mock (WPDB) - Mock WordPress database operations
• Test Data Factories - Fluent builders for creating test WordPress posts and users
• Hook Assertions - PHPUnit assertions for verifying hook behavior
• Base Test Case - Extended PHPUnit TestCase with WordPress integration

Installation

composer require ksfraser/mock-wordpress --dev

Or use file-based repository during development:

{
  "repositories": [
    {"type": "path", "url": "../mock-wordpress"}
  ],
  "require-dev": {
    "ksfraser/mock-wordpress": "^1.0"
  }
}

Usage

Basic Test with Mocks

use ksfraser\MockWordPress\TestCase;
use ksfraser\MockWordPress\Mock\WordPressFunctions;
use ksfraser\MockWordPress\Mock\WordPressHooks;

class MyPluginTest extends TestCase
{
    public function testPluginSetsOption()
    {
        WordPressFunctions::update_option('my_plugin_setting', 'value');
        $result = WordPressFunctions::get_option('my_plugin_setting');
        
        $this->assertEquals('value', $result);
    }
}

Testing Hooks

class HookRegistrationTest extends TestCase
{
    public function testPluginRegistersActionHook()
    {
        // Your plugin code registers hooks...
        $callback = function() { echo 'done'; };
        WordPressHooks::add_action('save_post', $callback);
        
        // Assert
        $this->assertHookRegistered('save_post');
    }

    public function testActionIsExecuted()
    {
        $executed = [];
        WordPressHooks::add_action('my_action', function($value) use (&$executed) {
            $executed[] = $value;
        });
        
        WordPressHooks::do_action('my_action', 'data');
        
        $this->assertActionExecuted('my_action');
        $this->assertContains('data', $executed);
    }
}

Using Test Data Factories

use ksfraser\MockWordPress\Factory\PostFactory;
use ksfraser\MockWordPress\Factory\UserFactory;

class PostProcessingTest extends TestCase
{
    public function testProcessPost()
    {
        $post = (new PostFactory())
            ->title('Test Post')
            ->type('post')
            ->status('publish')
            ->author(1)
            ->content('Post content here')
            ->build();
        
        // Use $post in your test
        $this->assertEquals('Test Post', $post->post_title);
    }

    public function testProcessUser()
    {
        $user = (new UserFactory())
            ->login('testuser')
            ->email('test@example.com')
            ->administrator()
            ->build();
        
        $this->assertContains('administrator', $user->roles);
    }
}

Testing Database Operations

use ksfraser\MockWordPress\Mock\WPDB;

class DatabaseTest extends TestCase
{
    public function testPreparedQueries()
    {
        $wpdb = $this->wpdb; // Inherited from TestCase
        
        $query = $wpdb->prepare(
            "SELECT * FROM posts WHERE ID = %d AND status = %s",
            [123, 'publish']
        );
        
        $this->assertStringContainsString('123', $query);
        $this->assertStringContainsString("'publish'", $query);
    }

    public function testQueryResults()
    {
        $this->setWpdbResults([
            (object)['ID' => 1, 'post_title' => 'Post 1'],
            (object)['ID' => 2, 'post_title' => 'Post 2'],
        ]);
        
        $results = $this->wpdb->get_results();
        
        $this->assertCount(2, $results);
    }
}

Components

WordPressFunctions

Static methods mimicking common WordPress functions:

• get_option() / update_option() / delete_option()
• get_post_meta() / update_post_meta() / delete_post_meta()
• get_user_meta() / update_user_meta()
• esc_html() / esc_attr() / sanitize_text_field()
• __() / _e() (translation functions)
• current_user_can()
• wp_safe_remote_post() / wp_safe_remote_get()

WordPressHooks

Track and manage WordPress hooks:

• add_action($hook, $callback, $priority, $accepted_args)
• add_filter($hook, $callback, $priority, $accepted_args)
• do_action($hook, ...$args) - Execute action hooks
• apply_filters($hook, $value, ...$args) - Apply filter hooks
• hasHook($hook, $callback)
• removeHook($hook, $callback, $priority)
• getExecutedActions($hook) - Get execution history
• getAppliedFilters($hook) - Get filter application history
• reset() - Clear all hooks

WPDB

Mock WordPress database operations:

• prepare($query, $values) - Prepare queries with placeholders
• query($query) - Execute query
• get_var($query, $x, $y) - Get single value
• get_row($query, $output, $row) - Get single row
• get_results($query, $output) - Get all results
• setQueryResults($results) - Set results for testing
• getQueryLog() - Get executed queries log

Test Factories

PostFactory

Fluent builder for WordPress posts:

$post = (new PostFactory())
    ->id(123)
    ->title('My Post')
    ->type('post')
    ->status('publish')
    ->author(1)
    ->content('Post content')
    ->excerpt('Post excerpt')
    ->date('2026-01-15 10:30:00')
    ->published()  // Helper for status
    ->build();

UserFactory

Fluent builder for WordPress users:

$user = (new UserFactory())
    ->id(42)
    ->login('username')
    ->email('user@example.com')
    ->password('secure_password')
    ->displayName('User Name')
    ->role('administrator')  // or customer, shop_manager, subscriber
    ->addRole('editor')  // Add additional role
    ->build();

Hook Assertions

PHPUnit assertions for hooks (available in TestCase):

$this->assertHookRegistered('save_post');
$this->assertActionExecuted('publish_post');
$this->assertActionNotExecuted('trashed_post');
$this->assertFilterApplied('the_content');
$this->assertActionExecutedTimes('save_post', 3);

Base TestCase

Extend ksfraser\MockWordPress\TestCase instead of PHPUnit\Framework\TestCase:

use ksfraser\MockWordPress\TestCase;

class MyTest extends TestCase
{
    // setUp() and tearDown() automatically configure mocks
    // $this->wpdb is available
    // Hook assertion methods available
}

Running Tests

vendor/bin/phpunit
vendor/bin/phpunit tests/Mock/WordPressFunctionsTest.php
vendor/bin/phpunit --coverage-html=coverage

Test Coverage

• Tests included for all core components
• Run with coverage reports:

  composer test-coverage

Dependencies

• PHPUnit 9.6+
• PHP 7.3+

Related Packages

• ksfraser/mock-woocommerce - WooCommerce specific mocks
• ksfraser/test-factories - Auction-specific test data builders

License

GPL 3.0 or later

Contributing

When adding new mocks or factories:

1. Follow PSR-12 code standards
2. Add PHPDoc documentation with @requirement tags
3. Include 100% unit test coverage
4. Ensure fluent interfaces for factories
5. Update this README with usage examples