ServiceUnavailableHttpException example

namespace Symfony\Component\HttpKernel\Tests\Exception;

use Symfony\Component\HttpKernel\Exception\HttpException;
use Symfony\Component\HttpKernel\Exception\ServiceUnavailableHttpException;

class ServiceUnavailableHttpExceptionTest extends HttpExceptionTest
{
    public function testHeadersDefaultRetryAfter()
    {
        $exception = new ServiceUnavailableHttpException(10);
        $this->assertSame(['Retry-After' => 10], $exception->getHeaders());
    }

    public function testWithHeaderConstruct()
    {
        $headers = [
            'Cache-Control' => 'public, s-maxage=1337',
        ];

        $exception = new ServiceUnavailableHttpException(1337, '', null, 0, $headers);

        

    }

    // Don't start generating the image if the derivative already exists or if     // generation is in progress in another thread.     if (!file_exists($derivative_uri)) {
      $lock_name = 'image_style_deliver:' . $image_style->id() . ':' . Crypt::hashBase64($image_uri);
      $lock_acquired = $this->lock->acquire($lock_name);
      if (!$lock_acquired) {
        // Tell client to retry again in 3 seconds. Currently no browsers are         // known to support Retry-After.         throw new ServiceUnavailableHttpException(3, 'Image generation in progress. Try again shortly.');
      }
    }

    // Try to generate the image, unless another thread just did it while we     // were acquiring the lock.     $success = file_exists($derivative_uri) || $image_style->createDerivative($image_uri, $derivative_uri);

    if (!empty($lock_acquired)) {
      $this->lock->release($lock_name);
    }

    

$this->assertEquals('410', $flattened->getStatusCode());

        $flattened = FlattenException::createFromThrowable(new LengthRequiredHttpException());
        $this->assertEquals('411', $flattened->getStatusCode());

        $flattened = FlattenException::createFromThrowable(new PreconditionFailedHttpException());
        $this->assertEquals('412', $flattened->getStatusCode());

        $flattened = FlattenException::createFromThrowable(new PreconditionRequiredHttpException());
        $this->assertEquals('428', $flattened->getStatusCode());

        $flattened = FlattenException::createFromThrowable(new ServiceUnavailableHttpException());
        $this->assertEquals('503', $flattened->getStatusCode());

        $flattened = FlattenException::createFromThrowable(new TooManyRequestsHttpException());
        $this->assertEquals('429', $flattened->getStatusCode());

        $flattened = FlattenException::createFromThrowable(new UnsupportedMediaTypeHttpException());
        $this->assertEquals('415', $flattened->getStatusCode());

        if (class_exists(SuspiciousOperationException::class)) {
            $flattened = FlattenException::createFromThrowable(new SuspiciousOperationException());
            $this->assertEquals('400', $flattened->getStatusCode());
        }