Kevinrob\GuzzleCache\ValidationTest::testStaleWhileRevalidateHeader PHP Method

    public function testStaleWhileRevalidateHeader()
    {
        $this->client->get('http://test.com/stale-while-revalidate');
        sleep(2);
        $response = $this->client->get('http://test.com/stale-while-revalidate');
        $this->assertEquals(CacheMiddleware::HEADER_CACHE_STALE, $response->getHeaderLine(CacheMiddleware::HEADER_CACHE_INFO));
        // Do that at the end of the php script...
        $this->cache->purgeReValidation();
        $response = $this->client->get('http://test.com/stale-while-revalidate');
        $this->assertEquals(CacheMiddleware::HEADER_CACHE_HIT, $response->getHeaderLine(CacheMiddleware::HEADER_CACHE_INFO));
    }