FinalExceptionSubscriberTest.php

<?php

namespace Drupal\Tests\Core\EventSubscriber;

use Drupal\Core\EventSubscriber\FinalExceptionSubscriber;
use Drupal\Tests\UnitTestCase;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Event\ExceptionEvent;
use Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException;
use Symfony\Component\HttpKernel\HttpKernelInterface;

/**
 * @coversDefaultClass \Drupal\Core\EventSubscriber\FinalExceptionSubscriber
 * @group EventSubscriber
 */
class FinalExceptionSubscriberTest extends UnitTestCase {
    
    /**
     * @covers ::onException
     */
    public function testOnExceptionWithUnknownFormat() {
        $config_factory = $this->getConfigFactoryStub();
        $kernel = $this->prophesize(HttpKernelInterface::class);
        $request = Request::create('/test');
        // \Drupal\Core\StackMiddleware\NegotiationMiddleware normally takes care
        // of this so we'll hard code it here.
        $request->setRequestFormat('bananas');
        $e = new MethodNotAllowedHttpException([
            'POST',
            'PUT',
        ], 'test message');
        $event = new ExceptionEvent($kernel->reveal(), $request, HttpKernelInterface::MASTER_REQUEST, $e);
        $subscriber = new TestDefaultExceptionSubscriber($config_factory);
        $subscriber->setStringTranslation($this->getStringTranslationStub());
        $subscriber->onException($event);
        $response = $event->getResponse();
        $this->assertInstanceOf(Response::class, $response);
        $this->stringStartsWith('The website encountered an unexpected error. Please try again later.<br><br><em class="placeholder">Symfony\\Component\\HttpKernel\\Exception\\MethodNotAllowedHttpException</em>: test message in ', $response->getContent());
        $this->assertEquals(405, $response->getStatusCode());
        $this->assertEquals('POST, PUT', $response->headers
            ->get('Allow'));
        // Also check that the text/plain content type was added.
        $this->assertEquals('text/plain', $response->headers
            ->get('Content-Type'));
    }

}
class TestDefaultExceptionSubscriber extends FinalExceptionSubscriber {
    protected function isErrorDisplayable($error) {
        return TRUE;
    }
    protected function simplifyFileInError($error) {
        return $error;
    }
    protected function isErrorLevelVerbose() {
        return TRUE;
    }

}