CacheTest::testOutputMongoCache PHP Method

    public function testOutputMongoCache()
    {
        list($ready, $collection) = $this->_prepareMongo();
        if (!$ready) {
            return false;
        }
        $time = date('H:i:s');
        $frontCache = new Phalcon\Cache\Frontend\Output(array('lifetime' => 3));
        $cache = new Phalcon\Cache\Backend\Mongo($frontCache, array('server' => 'mongodb://localhost', 'db' => 'phalcon_test', 'collection' => 'caches'));
        ob_start();
        //First time cache
        $content = $cache->start('test-output');
        $this->assertTrue($content === null);
        echo $time;
        $cache->save(null, null, null, true);
        $obContent = ob_get_contents();
        ob_end_clean();
        $this->assertEquals($time, $obContent);
        $document = $collection->findOne(array('key' => 'test-output'));
        $this->assertTrue(is_array($document));
        $this->assertEquals($time, $document['data']);
        //Expect same cache
        $content = $cache->start('test-output');
        $this->assertFalse($content === null);
        $document = $collection->findOne(array('key' => 'test-output'));
        $this->assertTrue(is_array($document));
        $this->assertEquals($time, $document['data']);
        //Query keys
        $keys = $cache->queryKeys();
        $this->assertEquals($keys, array(0 => 'test-output'));
        //Exists
        $this->assertTrue($cache->exists('test-output'));
        //Delete entry from cache
        $this->assertTrue($cache->delete('test-output'));
    }