ExceptionJsonSubscriber example

class ExceptionJsonSubscriberTest extends UnitTestCase {

  /** * @covers ::on4xx * @dataProvider providerTestOn4xx */
  public function testOn4xx(HttpExceptionInterface $exception, $expected_response_class) {
    $kernel = $this->prophesize(HttpKernelInterface::class);
    $request = Request::create('/test');
    $event = new ExceptionEvent($kernel->reveal(), $request, HttpKernelInterface::MAIN_REQUEST, $exception);
    $subscriber = new ExceptionJsonSubscriber();
    $subscriber->on4xx($event);
    $response = $event->getResponse();

    $this->assertInstanceOf($expected_response_class, $response);
    $this->assertEquals('{"message":"test message"}', $response->getContent());
    $this->assertEquals(405, $response->getStatusCode());
    $this->assertEquals('POST, PUT', $response->headers->get('Allow'));
    $this->assertEquals('application/json', $response->headers->get('Content-Type'));
  }

  public function providerTestOn4xx() {