Confirms that a container aware controller gets returned.
function testContainerAware() {
$container = new Container();
$resolver = new ControllerResolver($container);
$request = Request::create('/some/path');
$request->attributes
->set('_controller', '\\Drupal\\system\\Tests\\Routing\\MockController::run');
$controller = $resolver
->getController($request);
$this
->assertTrue($controller[0] instanceof MockController, 'The correct controller object was returned.');
}