public function testInvalidRouteFormat()
{
$request = new Request([], [], ['_api_resource_class' => 'Foo', '_format' => 'invalid']);
$eventProphecy = $this->prophesize(GetResponseEvent::class);
$eventProphecy->getRequest()->willReturn($request)->shouldBeCalled();
$event = $eventProphecy->reveal();
$listener = new AddFormatListener(new Negotiator(), ['json' => ['application/json']]);
$listener->onKernelRequest($event);
}