public function testSupportedAcceptHeader()
{
$request = new Request([], [], ['_api_resource_class' => 'Foo']);
$request->headers->set('Accept', 'text/html, application/xhtml+xml, application/xml, application/json;q=0.9, */*;q=0.8');
$eventProphecy = $this->prophesize(GetResponseEvent::class);
$eventProphecy->getRequest()->willReturn($request)->shouldBeCalled();
$event = $eventProphecy->reveal();
$listener = new AddFormatListener(new Negotiator(), ['binary' => ['application/octet-stream'], 'json' => ['application/json']]);
$listener->onKernelRequest($event);
$this->assertSame('json', $request->getRequestFormat());
}