Issue #3162031 by ravi.shankar, Hardik_Patel_12, longwave, catch: [Symfony...

Issue #3162031 by ravi.shankar, Hardik_Patel_12, longwave, catch: [Symfony 5.1] Class "Symfony\Component\HttpKernel\Event\ViewEvent" is declared "final" and cannot be mocked

core/tests/Drupal/Tests/Core/EventSubscriber/PsrResponseSubscriberTest.php

@@ -4,6 +4,10 @@
 
 use Drupal\Tests\UnitTestCase;
 use Drupal\Core\EventSubscriber\PsrResponseSubscriber;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Event\ViewEvent;
+use Symfony\Component\HttpKernel\HttpKernelInterface;
 
 /**
  * @coversDefaultClass \Drupal\Core\EventSubscriber\PsrResponseSubscriber
@@ -48,12 +52,9 @@ protected function setUp(): void {
    * @covers ::onKernelView
    */
   public function testConvertsControllerResult() {
-    $event = $this->createEventMock($this->createMock('Psr\Http\Message\ResponseInterface'));
-    $event
-      ->expects($this->once())
-      ->method('setResponse')
-      ->with($this->isInstanceOf('Symfony\Component\HttpFoundation\Response'));
+    $event = $this->createEvent($this->createMock('Psr\Http\Message\ResponseInterface'));
     $this->psrResponseSubscriber->onKernelView($event);
+    $this->assertInstanceOf(Response::class, $event->getResponse());
   }
 
   /**
@@ -62,36 +63,31 @@ public function testConvertsControllerResult() {
    * @covers ::onKernelView
    */
   public function testDoesNotConvertControllerResult() {
-    $event = $this->createEventMock([]);
-    $event
-      ->expects($this->never())
-      ->method('setResponse');
+    $event = $this->createEvent([]);
     $this->psrResponseSubscriber->onKernelView($event);
-    $event = $this->createEventMock(NULL);
-    $event
-      ->expects($this->never())
-      ->method('setResponse');
+    $this->assertNull($event->getResponse());
+
+    $event = $this->createEvent(NULL);
     $this->psrResponseSubscriber->onKernelView($event);
+    $this->assertNull($event->getResponse());
   }
 
   /**
-   * Sets up an alias event that return $controllerResult.
+   * Sets up an event that returns $controllerResult.
    *
    * @param mixed $controller_result
    *   The return Object.
    *
-   * @return \Symfony\Component\HttpKernel\Event\ViewEvent|\PHPUnit\Framework\MockObject\MockObject
-   *   A mock object to test.
+   * @return \Symfony\Component\HttpKernel\Event\ViewEvent
+   *   A ViewEvent object to test.
    */
-  protected function createEventMock($controller_result) {
-    $event = $this->getMockBuilder('Symfony\Component\HttpKernel\Event\ViewEvent')
-      ->disableOriginalConstructor()
-      ->getMock();
-    $event
-      ->expects($this->once())
-      ->method('getControllerResult')
-      ->willReturn($controller_result);
-    return $event;
+  protected function createEvent($controller_result) {
+    return new ViewEvent(
+      $this->createMock(HttpKernelInterface::class),
+      $this->createMock(Request::class),
+      HttpKernelInterface::MASTER_REQUEST,
+      $controller_result
+    );
   }
 
 }