ResponseTest.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Symfony\Component\HttpFoundation\Tests;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
class ResponseTest extends ResponseTestCase {
  public function testCreate() {
    $response = Response::create('foo', 301, array(
      'Foo' => 'bar',
    ));
    $this
      ->assertInstanceOf('Symfony\\Component\\HttpFoundation\\Response', $response);
    $this
      ->assertEquals(301, $response
      ->getStatusCode());
    $this
      ->assertEquals('bar', $response->headers
      ->get('foo'));
  }
  public function testToString() {
    $response = new Response();
    $response = explode("\r\n", $response);
    $this
      ->assertEquals("HTTP/1.0 200 OK", $response[0]);
    $this
      ->assertEquals("Cache-Control: no-cache", $response[1]);
  }
  public function testClone() {
    $response = new Response();
    $responseClone = clone $response;
    $this
      ->assertEquals($response, $responseClone);
  }
  public function testSendHeaders() {
    $response = new Response();
    $headers = $response
      ->sendHeaders();
    $this
      ->assertObjectHasAttribute('headers', $headers);
    $this
      ->assertObjectHasAttribute('content', $headers);
    $this
      ->assertObjectHasAttribute('version', $headers);
    $this
      ->assertObjectHasAttribute('statusCode', $headers);
    $this
      ->assertObjectHasAttribute('statusText', $headers);
    $this
      ->assertObjectHasAttribute('charset', $headers);
  }
  public function testSend() {
    $response = new Response();
    $responseSend = $response
      ->send();
    $this
      ->assertObjectHasAttribute('headers', $responseSend);
    $this
      ->assertObjectHasAttribute('content', $responseSend);
    $this
      ->assertObjectHasAttribute('version', $responseSend);
    $this
      ->assertObjectHasAttribute('statusCode', $responseSend);
    $this
      ->assertObjectHasAttribute('statusText', $responseSend);
    $this
      ->assertObjectHasAttribute('charset', $responseSend);
  }
  public function testGetCharset() {
    $response = new Response();
    $charsetOrigin = 'UTF-8';
    $response
      ->setCharset($charsetOrigin);
    $charset = $response
      ->getCharset();
    $this
      ->assertEquals($charsetOrigin, $charset);
  }
  public function testIsCacheable() {
    $response = new Response();
    $this
      ->assertFalse($response
      ->isCacheable());
  }
  public function testIsCacheableWithSetTtl() {
    $response = new Response();
    $response
      ->setTtl(10);
    $this
      ->assertTrue($response
      ->isCacheable());
  }
  public function testMustRevalidate() {
    $response = new Response();
    $this
      ->assertFalse($response
      ->mustRevalidate());
  }
  public function testSetNotModified() {
    $response = new Response();
    $modified = $response
      ->setNotModified();
    $this
      ->assertObjectHasAttribute('headers', $modified);
    $this
      ->assertObjectHasAttribute('content', $modified);
    $this
      ->assertObjectHasAttribute('version', $modified);
    $this
      ->assertObjectHasAttribute('statusCode', $modified);
    $this
      ->assertObjectHasAttribute('statusText', $modified);
    $this
      ->assertObjectHasAttribute('charset', $modified);
    $this
      ->assertEquals(304, $modified
      ->getStatusCode());
  }
  public function testIsSuccessful() {
    $response = new Response();
    $this
      ->assertTrue($response
      ->isSuccessful());
  }
  public function testIsNotModified() {
    $response = new Response();
    $modified = $response
      ->isNotModified(new Request());
    $this
      ->assertFalse($modified);
  }
  public function testIsValidateable() {
    $response = new Response('', 200, array(
      'Last-Modified' => $this
        ->createDateTimeOneHourAgo()
        ->format(DATE_RFC2822),
    ));
    $this
      ->assertTrue($response
      ->isValidateable(), '->isValidateable() returns true if Last-Modified is present');
    $response = new Response('', 200, array(
      'ETag' => '"12345"',
    ));
    $this
      ->assertTrue($response
      ->isValidateable(), '->isValidateable() returns true if ETag is present');
    $response = new Response();
    $this
      ->assertFalse($response
      ->isValidateable(), '->isValidateable() returns false when no validator is present');
  }
  public function testGetDate() {
    $response = new Response('', 200, array(
      'Date' => $this
        ->createDateTimeOneHourAgo()
        ->format(DATE_RFC2822),
    ));
    $this
      ->assertEquals(0, $this
      ->createDateTimeOneHourAgo()
      ->diff($response
      ->getDate())
      ->format('%s'), '->getDate() returns the Date header if present');
    $response = new Response();
    $date = $response
      ->getDate();
    $this
      ->assertLessThan(1, $date
      ->diff(new \DateTime(), true)
      ->format('%s'), '->getDate() returns the current Date if no Date header present');
    $response = new Response('', 200, array(
      'Date' => $this
        ->createDateTimeOneHourAgo()
        ->format(DATE_RFC2822),
    ));
    $now = $this
      ->createDateTimeNow();
    $response->headers
      ->set('Date', $now
      ->format(DATE_RFC2822));
    $this
      ->assertEquals(0, $now
      ->diff($response
      ->getDate())
      ->format('%s'), '->getDate() returns the date when the header has been modified');
    $response = new Response('', 200);
    $response->headers
      ->remove('Date');
    $this
      ->assertInstanceOf('\\DateTime', $response
      ->getDate());
  }
  public function testGetMaxAge() {
    $response = new Response();
    $response->headers
      ->set('Cache-Control', 's-maxage=600, max-age=0');
    $this
      ->assertEquals(600, $response
      ->getMaxAge(), '->getMaxAge() uses s-maxage cache control directive when present');
    $response = new Response();
    $response->headers
      ->set('Cache-Control', 'max-age=600');
    $this
      ->assertEquals(600, $response
      ->getMaxAge(), '->getMaxAge() falls back to max-age when no s-maxage directive present');
    $response = new Response();
    $response->headers
      ->set('Cache-Control', 'must-revalidate');
    $response->headers
      ->set('Expires', $this
      ->createDateTimeOneHourLater()
      ->format(DATE_RFC2822));
    $this
      ->assertEquals(3600, $response
      ->getMaxAge(), '->getMaxAge() falls back to Expires when no max-age or s-maxage directive present');
    $response = new Response();
    $response->headers
      ->set('Cache-Control', 'must-revalidate');
    $response->headers
      ->set('Expires', -1);
    $this
      ->assertEquals('Sat, 01 Jan 00 00:00:00 +0000', $response
      ->getExpires()
      ->format(DATE_RFC822));
    $response = new Response();
    $this
      ->assertNull($response
      ->getMaxAge(), '->getMaxAge() returns null if no freshness information available');
  }
  public function testSetSharedMaxAge() {
    $response = new Response();
    $response
      ->setSharedMaxAge(20);
    $cacheControl = $response->headers
      ->get('Cache-Control');
    $this
      ->assertEquals('public, s-maxage=20', $cacheControl);
  }
  public function testIsPrivate() {
    $response = new Response();
    $response->headers
      ->set('Cache-Control', 'max-age=100');
    $response
      ->setPrivate();
    $this
      ->assertEquals(100, $response->headers
      ->getCacheControlDirective('max-age'), '->isPrivate() adds the private Cache-Control directive when set to true');
    $this
      ->assertTrue($response->headers
      ->getCacheControlDirective('private'), '->isPrivate() adds the private Cache-Control directive when set to true');
    $response = new Response();
    $response->headers
      ->set('Cache-Control', 'public, max-age=100');
    $response
      ->setPrivate();
    $this
      ->assertEquals(100, $response->headers
      ->getCacheControlDirective('max-age'), '->isPrivate() adds the private Cache-Control directive when set to true');
    $this
      ->assertTrue($response->headers
      ->getCacheControlDirective('private'), '->isPrivate() adds the private Cache-Control directive when set to true');
    $this
      ->assertFalse($response->headers
      ->hasCacheControlDirective('public'), '->isPrivate() removes the public Cache-Control directive');
  }
  public function testExpire() {
    $response = new Response();
    $response->headers
      ->set('Cache-Control', 'max-age=100');
    $response
      ->expire();
    $this
      ->assertEquals(100, $response->headers
      ->get('Age'), '->expire() sets the Age to max-age when present');
    $response = new Response();
    $response->headers
      ->set('Cache-Control', 'max-age=100, s-maxage=500');
    $response
      ->expire();
    $this
      ->assertEquals(500, $response->headers
      ->get('Age'), '->expire() sets the Age to s-maxage when both max-age and s-maxage are present');
    $response = new Response();
    $response->headers
      ->set('Cache-Control', 'max-age=5, s-maxage=500');
    $response->headers
      ->set('Age', '1000');
    $response
      ->expire();
    $this
      ->assertEquals(1000, $response->headers
      ->get('Age'), '->expire() does nothing when the response is already stale/expired');
    $response = new Response();
    $response
      ->expire();
    $this
      ->assertFalse($response->headers
      ->has('Age'), '->expire() does nothing when the response does not include freshness information');
    $response = new Response();
    $response->headers
      ->set('Expires', -1);
    $response
      ->expire();
    $this
      ->assertNull($response->headers
      ->get('Age'), '->expire() does not set the Age when the response is expired');
  }
  public function testGetTtl() {
    $response = new Response();
    $this
      ->assertNull($response
      ->getTtl(), '->getTtl() returns null when no Expires or Cache-Control headers are present');
    $response = new Response();
    $response->headers
      ->set('Expires', $this
      ->createDateTimeOneHourLater()
      ->format(DATE_RFC2822));
    $this
      ->assertLessThan(1, 3600 - $response
      ->getTtl(), '->getTtl() uses the Expires header when no max-age is present');
    $response = new Response();
    $response->headers
      ->set('Expires', $this
      ->createDateTimeOneHourAgo()
      ->format(DATE_RFC2822));
    $this
      ->assertLessThan(0, $response
      ->getTtl(), '->getTtl() returns negative values when Expires is in past');
    $response = new Response();
    $response->headers
      ->set('Expires', $response
      ->getDate()
      ->format(DATE_RFC2822));
    $response->headers
      ->set('Age', 0);
    $this
      ->assertSame(0, $response
      ->getTtl(), '->getTtl() correctly handles zero');
    $response = new Response();
    $response->headers
      ->set('Cache-Control', 'max-age=60');
    $this
      ->assertLessThan(1, 60 - $response
      ->getTtl(), '->getTtl() uses Cache-Control max-age when present');
  }
  public function testSetClientTtl() {
    $response = new Response();
    $response
      ->setClientTtl(10);
    $this
      ->assertEquals($response
      ->getMaxAge(), $response
      ->getAge() + 10);
  }
  public function testGetSetProtocolVersion() {
    $response = new Response();
    $this
      ->assertEquals('1.0', $response
      ->getProtocolVersion());
    $response
      ->setProtocolVersion('1.1');
    $this
      ->assertEquals('1.1', $response
      ->getProtocolVersion());
  }
  public function testGetVary() {
    $response = new Response();
    $this
      ->assertEquals(array(), $response
      ->getVary(), '->getVary() returns an empty array if no Vary header is present');
    $response = new Response();
    $response->headers
      ->set('Vary', 'Accept-Language');
    $this
      ->assertEquals(array(
      'Accept-Language',
    ), $response
      ->getVary(), '->getVary() parses a single header name value');
    $response = new Response();
    $response->headers
      ->set('Vary', 'Accept-Language User-Agent    X-Foo');
    $this
      ->assertEquals(array(
      'Accept-Language',
      'User-Agent',
      'X-Foo',
    ), $response
      ->getVary(), '->getVary() parses multiple header name values separated by spaces');
    $response = new Response();
    $response->headers
      ->set('Vary', 'Accept-Language,User-Agent,    X-Foo');
    $this
      ->assertEquals(array(
      'Accept-Language',
      'User-Agent',
      'X-Foo',
    ), $response
      ->getVary(), '->getVary() parses multiple header name values separated by commas');
  }
  public function testSetVary() {
    $response = new Response();
    $response
      ->setVary('Accept-Language');
    $this
      ->assertEquals(array(
      'Accept-Language',
    ), $response
      ->getVary());
    $response
      ->setVary('Accept-Language, User-Agent');
    $this
      ->assertEquals(array(
      'Accept-Language',
      'User-Agent',
    ), $response
      ->getVary(), '->setVary() replace the vary header by default');
    $response
      ->setVary('X-Foo', false);
    $this
      ->assertEquals(array(
      'Accept-Language',
      'User-Agent',
    ), $response
      ->getVary(), '->setVary() doesn\'t change the Vary header if replace is set to false');
  }
  public function testDefaultContentType() {
    $headerMock = $this
      ->getMock('Symfony\\Component\\HttpFoundation\\ResponseHeaderBag', array(
      'set',
    ));
    $headerMock
      ->expects($this
      ->at(0))
      ->method('set')
      ->with('Content-Type', 'text/html');
    $headerMock
      ->expects($this
      ->at(1))
      ->method('set')
      ->with('Content-Type', 'text/html; charset=UTF-8');
    $response = new Response('foo');
    $response->headers = $headerMock;
    $response
      ->prepare(new Request());
  }
  public function testContentTypeCharset() {
    $response = new Response();
    $response->headers
      ->set('Content-Type', 'text/css');

    // force fixContentType() to be called
    $response
      ->prepare(new Request());
    $this
      ->assertEquals('text/css; charset=UTF-8', $response->headers
      ->get('Content-Type'));
  }
  public function testPrepareDoesNothingIfContentTypeIsSet() {
    $response = new Response('foo');
    $response->headers
      ->set('Content-Type', 'text/plain');
    $response
      ->prepare(new Request());
    $this
      ->assertEquals('text/plain; charset=UTF-8', $response->headers
      ->get('content-type'));
  }
  public function testPrepareDoesNothingIfRequestFormatIsNotDefined() {
    $response = new Response('foo');
    $response
      ->prepare(new Request());
    $this
      ->assertEquals('text/html; charset=UTF-8', $response->headers
      ->get('content-type'));
  }
  public function testPrepareSetContentType() {
    $response = new Response('foo');
    $request = Request::create('/');
    $request
      ->setRequestFormat('json');
    $response
      ->prepare($request);
    $this
      ->assertEquals('application/json', $response->headers
      ->get('content-type'));
  }
  public function testPrepareRemovesContentForHeadRequests() {
    $response = new Response('foo');
    $request = Request::create('/', 'HEAD');
    $response
      ->prepare($request);
    $this
      ->assertEquals('', $response
      ->getContent());
  }
  public function testPrepareSetsPragmaOnHttp10Only() {
    $request = Request::create('/', 'GET');
    $request->server
      ->set('SERVER_PROTOCOL', 'HTTP/1.0');
    $response = new Response('foo');
    $response
      ->prepare($request);
    $this
      ->assertEquals('no-cache', $response->headers
      ->get('pragma'));
    $this
      ->assertEquals('-1', $response->headers
      ->get('expires'));
    $request->server
      ->set('SERVER_PROTOCOL', 'HTTP/1.1');
    $response = new Response('foo');
    $response
      ->prepare($request);
    $this
      ->assertFalse($response->headers
      ->has('pragma'));
    $this
      ->assertFalse($response->headers
      ->has('expires'));
  }
  public function testSetCache() {
    $response = new Response();

    //array('etag', 'last_modified', 'max_age', 's_maxage', 'private', 'public')
    try {
      $response
        ->setCache(array(
        "wrong option" => "value",
      ));
      $this
        ->fail('->setCache() throws an InvalidArgumentException if an option is not supported');
    } catch (\Exception $e) {
      $this
        ->assertInstanceOf('InvalidArgumentException', $e, '->setCache() throws an InvalidArgumentException if an option is not supported');
      $this
        ->assertContains('"wrong option"', $e
        ->getMessage());
    }
    $options = array(
      'etag' => '"whatever"',
    );
    $response
      ->setCache($options);
    $this
      ->assertEquals($response
      ->getEtag(), '"whatever"');
    $now = new \DateTime();
    $options = array(
      'last_modified' => $now,
    );
    $response
      ->setCache($options);
    $this
      ->assertEquals($response
      ->getLastModified()
      ->getTimestamp(), $now
      ->getTimestamp());
    $options = array(
      'max_age' => 100,
    );
    $response
      ->setCache($options);
    $this
      ->assertEquals($response
      ->getMaxAge(), 100);
    $options = array(
      's_maxage' => 200,
    );
    $response
      ->setCache($options);
    $this
      ->assertEquals($response
      ->getMaxAge(), 200);
    $this
      ->assertTrue($response->headers
      ->hasCacheControlDirective('public'));
    $this
      ->assertFalse($response->headers
      ->hasCacheControlDirective('private'));
    $response
      ->setCache(array(
      'public' => true,
    ));
    $this
      ->assertTrue($response->headers
      ->hasCacheControlDirective('public'));
    $this
      ->assertFalse($response->headers
      ->hasCacheControlDirective('private'));
    $response
      ->setCache(array(
      'public' => false,
    ));
    $this
      ->assertFalse($response->headers
      ->hasCacheControlDirective('public'));
    $this
      ->assertTrue($response->headers
      ->hasCacheControlDirective('private'));
    $response
      ->setCache(array(
      'private' => true,
    ));
    $this
      ->assertFalse($response->headers
      ->hasCacheControlDirective('public'));
    $this
      ->assertTrue($response->headers
      ->hasCacheControlDirective('private'));
    $response
      ->setCache(array(
      'private' => false,
    ));
    $this
      ->assertTrue($response->headers
      ->hasCacheControlDirective('public'));
    $this
      ->assertFalse($response->headers
      ->hasCacheControlDirective('private'));
  }
  public function testSendContent() {
    $response = new Response('test response rendering', 200);
    ob_start();
    $response
      ->sendContent();
    $string = ob_get_clean();
    $this
      ->assertContains('test response rendering', $string);
  }
  public function testSetPublic() {
    $response = new Response();
    $response
      ->setPublic();
    $this
      ->assertTrue($response->headers
      ->hasCacheControlDirective('public'));
    $this
      ->assertFalse($response->headers
      ->hasCacheControlDirective('private'));
  }
  public function testSetExpires() {
    $response = new Response();
    $response
      ->setExpires(null);
    $this
      ->assertNull($response
      ->getExpires(), '->setExpires() remove the header when passed null');
    $now = new \DateTime();
    $response
      ->setExpires($now);
    $this
      ->assertEquals($response
      ->getExpires()
      ->getTimestamp(), $now
      ->getTimestamp());
  }
  public function testSetLastModified() {
    $response = new Response();
    $response
      ->setLastModified(new \DateTime());
    $this
      ->assertNotNull($response
      ->getLastModified());
    $response
      ->setLastModified(null);
    $this
      ->assertNull($response
      ->getLastModified());
  }
  public function testIsInvalid() {
    $response = new Response();
    try {
      $response
        ->setStatusCode(99);
      $this
        ->fail();
    } catch (\InvalidArgumentException $e) {
      $this
        ->assertTrue($response
        ->isInvalid());
    }
    try {
      $response
        ->setStatusCode(650);
      $this
        ->fail();
    } catch (\InvalidArgumentException $e) {
      $this
        ->assertTrue($response
        ->isInvalid());
    }
    $response = new Response('', 200);
    $this
      ->assertFalse($response
      ->isInvalid());
  }

  /**
   * @dataProvider getStatusCodeFixtures
   */
  public function testSetStatusCode($code, $text, $expectedText) {
    $response = new Response();
    $response
      ->setStatusCode($code, $text);
    $statusText = new \ReflectionProperty($response, 'statusText');
    $statusText
      ->setAccessible(true);
    $this
      ->assertEquals($expectedText, $statusText
      ->getValue($response));
  }
  public function getStatusCodeFixtures() {
    return array(
      array(
        '200',
        null,
        'OK',
      ),
      array(
        '200',
        false,
        '',
      ),
      array(
        '200',
        'foo',
        'foo',
      ),
      array(
        '199',
        null,
        '',
      ),
      array(
        '199',
        false,
        '',
      ),
      array(
        '199',
        'foo',
        'foo',
      ),
    );
  }
  public function testIsInformational() {
    $response = new Response('', 100);
    $this
      ->assertTrue($response
      ->isInformational());
    $response = new Response('', 200);
    $this
      ->assertFalse($response
      ->isInformational());
  }
  public function testIsRedirectRedirection() {
    foreach (array(
      301,
      302,
      303,
      307,
    ) as $code) {
      $response = new Response('', $code);
      $this
        ->assertTrue($response
        ->isRedirection());
      $this
        ->assertTrue($response
        ->isRedirect());
    }
    $response = new Response('', 304);
    $this
      ->assertTrue($response
      ->isRedirection());
    $this
      ->assertFalse($response
      ->isRedirect());
    $response = new Response('', 200);
    $this
      ->assertFalse($response
      ->isRedirection());
    $this
      ->assertFalse($response
      ->isRedirect());
    $response = new Response('', 404);
    $this
      ->assertFalse($response
      ->isRedirection());
    $this
      ->assertFalse($response
      ->isRedirect());
    $response = new Response('', 301, array(
      'Location' => '/good-uri',
    ));
    $this
      ->assertFalse($response
      ->isRedirect('/bad-uri'));
    $this
      ->assertTrue($response
      ->isRedirect('/good-uri'));
  }
  public function testIsNotFound() {
    $response = new Response('', 404);
    $this
      ->assertTrue($response
      ->isNotFound());
    $response = new Response('', 200);
    $this
      ->assertFalse($response
      ->isNotFound());
  }
  public function testIsEmpty() {
    foreach (array(
      201,
      204,
      304,
    ) as $code) {
      $response = new Response('', $code);
      $this
        ->assertTrue($response
        ->isEmpty());
    }
    $response = new Response('', 200);
    $this
      ->assertFalse($response
      ->isEmpty());
  }
  public function testIsForbidden() {
    $response = new Response('', 403);
    $this
      ->assertTrue($response
      ->isForbidden());
    $response = new Response('', 200);
    $this
      ->assertFalse($response
      ->isForbidden());
  }
  public function testIsOk() {
    $response = new Response('', 200);
    $this
      ->assertTrue($response
      ->isOk());
    $response = new Response('', 404);
    $this
      ->assertFalse($response
      ->isOk());
  }
  public function testIsServerOrClientError() {
    $response = new Response('', 404);
    $this
      ->assertTrue($response
      ->isClientError());
    $this
      ->assertFalse($response
      ->isServerError());
    $response = new Response('', 500);
    $this
      ->assertFalse($response
      ->isClientError());
    $this
      ->assertTrue($response
      ->isServerError());
  }
  public function testHasVary() {
    $response = new Response();
    $this
      ->assertFalse($response
      ->hasVary());
    $response
      ->setVary('User-Agent');
    $this
      ->assertTrue($response
      ->hasVary());
  }
  public function testSetEtag() {
    $response = new Response('', 200, array(
      'ETag' => '"12345"',
    ));
    $response
      ->setEtag();
    $this
      ->assertNull($response->headers
      ->get('Etag'), '->setEtag() removes Etags when call with null');
  }

  /**
   * @dataProvider validContentProvider
   */
  public function testSetContent($content) {
    $response = new Response();
    $response
      ->setContent($content);
    $this
      ->assertEquals((string) $content, $response
      ->getContent());
  }

  /**
   * @expectedException UnexpectedValueException
   * @dataProvider invalidContentProvider
   */
  public function testSetContentInvalid($content) {
    $response = new Response();
    $response
      ->setContent($content);
  }
  public function testSettersAreChainable() {
    $response = new Response();
    $setters = array(
      'setProtocolVersion' => '1.0',
      'setCharset' => 'UTF-8',
      'setPublic' => null,
      'setPrivate' => null,
      'setDate' => new \DateTime(),
      'expire' => null,
      'setMaxAge' => 1,
      'setSharedMaxAge' => 1,
      'setTtl' => 1,
      'setClientTtl' => 1,
    );
    foreach ($setters as $setter => $arg) {
      $this
        ->assertEquals($response, $response
        ->{$setter}($arg));
    }
  }
  public function validContentProvider() {
    return array(
      'obj' => array(
        new StringableObject(),
      ),
      'string' => array(
        'Foo',
      ),
      'int' => array(
        2,
      ),
    );
  }
  public function invalidContentProvider() {
    return array(
      'obj' => array(
        new \stdClass(),
      ),
      'array' => array(
        array(),
      ),
      'bool' => array(
        true,
        '1',
      ),
    );
  }
  protected function createDateTimeOneHourAgo() {
    $date = new \DateTime();
    return $date
      ->sub(new \DateInterval('PT1H'));
  }
  protected function createDateTimeOneHourLater() {
    $date = new \DateTime();
    return $date
      ->add(new \DateInterval('PT1H'));
  }
  protected function createDateTimeNow() {
    return new \DateTime();
  }
  protected function provideResponse() {
    return new Response();
  }

}
class StringableObject {
  public function __toString() {
    return 'Foo';
  }

}