Twig_Environment::getTemplateClass PHP Method

    public function getTemplateClass($name)
    {
        return $this->templateClassPrefix.md5($this->loader->getCacheKey($name));
    }

 public function testExtensionsAreNotInitializedWhenRenderingACompiledTemplate()
 {
     $cache = new Twig_Cache_Filesystem($dir = sys_get_temp_dir() . '/twig');
     $options = array('cache' => $cache, 'auto_reload' => false, 'debug' => false);
     // force compilation
     $twig = new Twig_Environment($loader = new Twig_Loader_Array(array('index' => '{{ foo }}')), $options);
     $key = $cache->generateKey('index', $twig->getTemplateClass('index'));
     $cache->write($key, $twig->compileSource(new Twig_Source('{{ foo }}', 'index')));
     // check that extensions won't be initialized when rendering a template that is already in the cache
     $twig = $this->getMockBuilder('Twig_Environment')->setConstructorArgs(array($loader, $options))->setMethods(array('initExtensions'))->getMock();
     $twig->expects($this->never())->method('initExtensions');
     // render template
     $output = $twig->render('index', array('foo' => 'bar'));
     $this->assertEquals('bar', $output);
     Twig_Tests_FilesystemHelper::removeDir($dir);
 }