removed not needed reference and recovered previous version of unit test

Author: geckod22

includes/HealthChecks/PersistentObjectCacheHealthCheck.php

@@ -2,7 +2,6 @@
 
 namespace NewfoldLabs\WP\Module\Performance\HealthChecks;
 
-use function NewfoldLabs\WP\Module\LinkTracker\Functions\build_link as buildLink;
 /**
  * Health check for persistent object cache.
  */

tests/phpunit/includes/HealthChecksTest.php

@@ -2,7 +2,6 @@
 
 namespace NewfoldLabs\WP\Module\Performance\HealthChecks;
 
-use Mockery;
 use WP_Mock;
 use WP_Mock\Tools\TestCase;
 use Patchwork;
@@ -329,15 +328,18 @@ public function test_defer_non_essential_js_health_check() {
 	 * Test PersistentObjectCacheHealthCheck.
 	 */
 	public function test_persistent_object_cache_health_check() {
+		WP_Mock::userFunction( 'wp_using_ext_object_cache' )
+			->once()
+			->andReturn( true );
 
-		$mock = Mockery::mock( 'PersistentObjectCacheHealthCheck' );
-
-		$mock->shouldReceive( 'test' )->once()->andReturn( true );
-		$this->assertTrue( $mock->test(), 'Persistent object caching should pass when enabled.' );
+		$health_check = new PersistentObjectCacheHealthCheck();
+		$this->assertTrue( $health_check->test(), 'Persistent object caching should pass when enabled.' );
 
-		$mock->shouldReceive( 'test' )->once()->andReturn( false );
+		WP_Mock::userFunction( 'wp_using_ext_object_cache' )
+			->once()
+			->andReturn( false );
 
-		$this->assertFalse( $mock->test(), 'Persistent object caching should fail when not enabled.' );
+		$this->assertFalse( $health_check->test(), 'Persistent object caching should fail when not enabled.' );
 	}
 
 	/**