Advanced WordPress Development

Chapter 14: WordPress Testing

14.1 Testing Overview

Test WordPress sites and code for quality assurance.

Testing Types:

• Unit Testing: Test individual functions
• Integration Testing: Test component interactions
• Functional Testing: Test user workflows
• Performance Testing: Test site speed

14.2 PHPUnit for WordPress

Use PHPUnit for automated testing.

// Example test
class MyPluginTest extends WP_UnitTestCase {
    public function test_my_function() {
        $result = my_function();
        $this->assertEquals('expected', $result);
    }
}

14.3 Manual Testing

Perform manual testing for user experience.

• Test all user workflows
• Test on different browsers
• Test on mobile devices
• Test with different user roles
• Test error scenarios

14.4 Debugging WordPress

Enable debugging in WordPress.

// Enable debugging in wp-config.php
define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);
define('SCRIPT_DEBUG', true);

14.5 Testing Tools

Use tools for WordPress testing.

• Query Monitor: Debug database queries
• Debug Bar: Debug information in admin
• PHPUnit: Automated testing
• Browser DevTools: Frontend debugging