/**
* @covers Symfony\Components\DependencyInjection\ContainerBuilder::registerExtension
* @covers Symfony\Components\DependencyInjection\ContainerBuilder::getExtension
*/
public function testExtension()
{
$container = new ContainerBuilder();
$container->registerExtension($extension = new \ProjectExtension());
$this->assertTrue($container->getExtension('project') === $extension, '->registerExtension() registers an extension');
}