Fix test conflicts between WP_Mock and WordPress unit tests

- Add guards to WP_Mock tests to skip when WP_UnitTestCase is available
- Add guards to WordPress unit tests to skip when WP_UnitTestCase is not available
- Add @group annotations for test separation

tests/phpunit/test-admin.php

@@ -3,8 +3,14 @@
  * Class AdminTest
  *
  * @package WPALLSTARS\PluginStarterTemplate
+ * @group wpmock
  */
 
+// Skip this test file if WP_Mock is not available or WordPress test framework is loaded.
+if ( ! class_exists( 'WP_Mock' ) || class_exists( 'WP_UnitTestCase' ) ) {
+	return;
+}
+
 use WPALLSTARS\PluginStarterTemplate\Admin\Admin;
 use WPALLSTARS\PluginStarterTemplate\Core;
 

tests/phpunit/test-core.php

@@ -3,8 +3,14 @@
  * Class CoreTest
  *
  * @package WPALLSTARS\PluginStarterTemplate
+ * @group wpmock
  */
 
+// Skip this test file if WP_Mock is not available or WordPress test framework is loaded.
+if ( ! class_exists( 'WP_Mock' ) || class_exists( 'WP_UnitTestCase' ) ) {
+	return;
+}
+
 use WPALLSTARS\PluginStarterTemplate\Core;
 
 /**

tests/phpunit/test-multisite.php

@@ -3,8 +3,14 @@
  * Class MultisiteTest
  *
  * @package WP_Plugin_Starter_Template_For_AI_Coding
+ * @group wordpress
  */
 
+// Skip this test file if WordPress test framework is not available.
+if ( ! class_exists( 'WP_UnitTestCase' ) ) {
+	return;
+}
+
 /**
  * Sample test case for the Multisite class.
  */