Edit: HttpCacheTestCase.php

Editing: HttpCacheTestCase.php

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<?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\HttpKernel\Tests\HttpCache;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\HttpCache\Esi;
use Symfony\Component\HttpKernel\HttpCache\HttpCache;
use Symfony\Component\HttpKernel\HttpCache\Store;
use Symfony\Component\HttpKernel\HttpKernelInterface;

class HttpCacheTestCase extends \PHPUnit_Framework_TestCase
{
    protected $kernel;
    protected $cache;
    protected $caches;
    protected $cacheConfig;
    protected $request;
    protected $response;
    protected $responses;
    protected $catch;
    protected $esi;

protected function setUp()
    {
        $this->kernel = null;

$this->cache = null;
        $this->esi = null;
        $this->caches = array();
        $this->cacheConfig = array();

$this->request = null;
        $this->response = null;
        $this->responses = array();

$this->catch = false;

$this->clearDirectory(sys_get_temp_dir().'/http_cache');
    }

protected function tearDown()
    {
        $this->kernel = null;
        $this->cache = null;
        $this->caches = null;
        $this->request = null;
        $this->response = null;
        $this->responses = null;
        $this->cacheConfig = null;
        $this->catch = null;
        $this->esi = null;

$this->clearDirectory(sys_get_temp_dir().'/http_cache');
    }

public function assertHttpKernelIsCalled()
    {
        $this->assertTrue($this->kernel->hasBeenCalled());
    }

public function assertHttpKernelIsNotCalled()
    {
        $this->assertFalse($this->kernel->hasBeenCalled());
    }

public function assertResponseOk()
    {
        $this->assertEquals(200, $this->response->getStatusCode());
    }

public function assertTraceContains($trace)
    {
        $traces = $this->cache->getTraces();
        $traces = current($traces);

$this->assertRegExp('/'.$trace.'/', implode(', ', $traces));
    }

public function assertTraceNotContains($trace)
    {
        $traces = $this->cache->getTraces();
        $traces = current($traces);

$this->assertNotRegExp('/'.$trace.'/', implode(', ', $traces));
    }

public function assertExceptionsAreCaught()
    {
        $this->assertTrue($this->kernel->isCatchingExceptions());
    }

public function assertExceptionsAreNotCaught()
    {
        $this->assertFalse($this->kernel->isCatchingExceptions());
    }

public function request($method, $uri = '/', $server = array(), $cookies = array(), $esi = false, $headers = array())
    {
        if (null === $this->kernel) {
            throw new \LogicException('You must call setNextResponse() before calling request().');
        }

$this->kernel->reset();

$this->store = new Store(sys_get_temp_dir().'/http_cache');

$this->cacheConfig['debug'] = true;

$this->esi = $esi ? new Esi() : null;
        $this->cache = new HttpCache($this->kernel, $this->store, $this->esi, $this->cacheConfig);
        $this->request = Request::create($uri, $method, array(), $cookies, array(), $server);
        $this->request->headers->add($headers);

$this->response = $this->cache->handle($this->request, HttpKernelInterface::MASTER_REQUEST, $this->catch);

$this->responses[] = $this->response;
    }

public function getMetaStorageValues()
    {
        $values = array();
        foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator(sys_get_temp_dir().'/http_cache/md', \RecursiveDirectoryIterator::SKIP_DOTS), \RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
            $values[] = file_get_contents($file);
        }

return $values;
    }

// A basic response with 200 status code and a tiny body.
    public function setNextResponse($statusCode = 200, array $headers = array(), $body = 'Hello World', \Closure $customizer = null)
    {
        $this->kernel = new TestHttpKernel($body, $statusCode, $headers, $customizer);
    }

public function setNextResponses($responses)
    {
        $this->kernel = new TestMultipleHttpKernel($responses);
    }

public function catchExceptions($catch = true)
    {
        $this->catch = $catch;
    }

public static function clearDirectory($directory)
    {
        if (!is_dir($directory)) {
            return;
        }

$fp = opendir($directory);
        while (false !== $file = readdir($fp)) {
            if (!in_array($file, array('.', '..'))) {
                if (is_link($directory.'/'.$file)) {
                    unlink($directory.'/'.$file);
                } elseif (is_dir($directory.'/'.$file)) {
                    self::clearDirectory($directory.'/'.$file);
                    rmdir($directory.'/'.$file);
                } else {
                    unlink($directory.'/'.$file);
                }
            }
        }

closedir($fp);
    }
}