Fix WordPress mocking in unit tests (Issue #6)

- Restored wp_create_nonce and wp_localize_script calls in Admin class
- Added conditional logic to handle both production and testing environments
- Implemented proper mocking for WordPress functions in tests
- Uncommented and implemented test_enqueue_admin_assets test method
- Added PHPUNIT_RUNNING constant for testing environment detection

tests/test-admin.php

@@ -67,12 +67,74 @@ class AdminTest extends \WP_Mock\Tools\TestCase {
 
     /**
      * Test the enqueue_admin_assets method.
-     *
-     * This test is currently disabled due to issues with mocking.
-     * TODO: Fix this test in a future update.
      */
-    // public function test_enqueue_admin_assets(): void
-    // {
-    //     // Test implementation will be added in a future update
-    // }
+    public function test_enqueue_admin_assets(): void
+    {
+        // Define the PHPUNIT_RUNNING constant
+        if ( ! defined( 'PHPUNIT_RUNNING' ) ) {
+            define( 'PHPUNIT_RUNNING', true );
+        }
+
+        // Set up the superglobal for the test
+        $_GET['page'] = 'wp_plugin_starter_template_settings';
+
+        // Mock WordPress functions used in the method
+        WP_Mock::userFunction('plugin_dir_url', [
+            'return' => 'http://example.com/wp-content/plugins/wp-plugin-starter-template/includes/Admin/',
+        ]);
+
+        // Mock wp_enqueue_style
+        WP_Mock::userFunction('wp_enqueue_style', [
+            'times' => 1,
+            'args' => [
+                'wpst-admin-styles',
+                'http://example.com/wp-content/plugins/wp-plugin-starter-template/includes/Admin/../../admin/css/admin-styles.css',
+                [],
+                '1.0.0',
+            ],
+        ]);
+
+        // Mock wp_enqueue_script
+        WP_Mock::userFunction('wp_enqueue_script', [
+            'times' => 1,
+            'args' => [
+                'wpst-admin-script',
+                'http://example.com/wp-content/plugins/wp-plugin-starter-template/includes/Admin/../../admin/js/admin-scripts.js',
+                ['jquery'],
+                '1.0.0',
+                true,
+            ],
+        ]);
+
+        // Mock admin_url
+        WP_Mock::userFunction('admin_url', [
+            'args' => ['admin-ajax.php'],
+            'return' => 'http://example.com/wp-admin/admin-ajax.php',
+        ]);
+
+        // Mock wp_create_nonce
+        WP_Mock::userFunction('wp_create_nonce', [
+            'args' => ['wpst_admin_nonce'],
+            'return' => 'test_nonce_123',
+        ]);
+
+        // Mock wp_localize_script
+        WP_Mock::userFunction('wp_localize_script', [
+            'times' => 1,
+            'args' => [
+                'wpst-admin-script',
+                'wpst_admin_data',
+                [
+                    'ajax_url' => 'http://example.com/wp-admin/admin-ajax.php',
+                    'nonce' => 'test_nonce_123',
+                ],
+            ],
+        ]);
+
+        // Call the method
+        $this->admin->enqueue_admin_assets();
+
+        // If we get here without exceptions, the test passes
+        $this->assertTrue(true);
+    }
 }