SerializerCacheWarmer example

class SerializerCacheWarmerTest extends TestCase
{
    /** * @dataProvider loaderProvider */
    public function testWarmUp(array $loaders)
    {
        $file = sys_get_temp_dir().'/cache-serializer.php';
        @unlink($file);

        $warmer = new SerializerCacheWarmer($loaders, $file);
        $warmer->warmUp(\dirname($file));

        $this->assertFileExists($file);

        $arrayPool = new PhpArrayAdapter($file, new NullAdapter());

        $this->assertTrue($arrayPool->getItem('Symfony_Bundle_FrameworkBundle_Tests_Fixtures_Serialization_Person')->isHit());
        $this->assertTrue($arrayPool->getItem('Symfony_Bundle_FrameworkBundle_Tests_Fixtures_Serialization_Author')->isHit());
    }

    public static function loaderProvider()
    {