public function testTemplateReference() {
$name = new Twig_Test_Loader_TemplateReference('foo');
$loader = new Twig_Loader_Array(array(
'foo' => 'bar',
));
$loader
->getCacheKey($name);
$loader
->getSource($name);
$loader
->isFresh($name, time());
$loader
->setTemplate($name, 'foobar');
}