/**
* @expectedException LogicException
* @expectedExceptionMessage Unable to register extension "environment_test" as it is already registered.
*/
public function testOverrideExtension()
{
$twig = new Apishka_Templater_Environment($this->createMock('Apishka_Templater_LoaderInterface'));
$twig->addExtension(new Apishka_Tests_Templater_EnvironmentTest_Extension());
$twig->addExtension(new Apishka_Tests_Templater_EnvironmentTest_Extension());
}