TemplateAttributeListener example

                $this->assertSame(array_shift($series), $args);

                return 'Bar';
            })
        ;

        $request = new Request();
        $kernel = $this->createMock(HttpKernelInterface::class);
        $controllerArgumentsEvent = new ControllerArgumentsEvent($kernel, [new TemplateAttributeController(), 'foo'], ['Bar'], $request, null);
        $listener = new TemplateAttributeListener($twig);

        $event = new ViewEvent($kernel, $request, HttpKernelInterface::MAIN_REQUEST, ['foo' => 'bar'], $controllerArgumentsEvent);
        $listener->onKernelView($event);
        $this->assertSame('Bar', $event->getResponse()->getContent());

        $event = new ViewEvent($kernel, $request, HttpKernelInterface::MAIN_REQUEST, null, $controllerArgumentsEvent);
        $listener->onKernelView($event);
        $this->assertSame('Bar', $event->getResponse()->getContent());

        $event = new ViewEvent($kernel, $request, HttpKernelInterface::MAIN_REQUEST, null);
        $listener->onKernelView($event);