I've read several threads where people had problems testing their controllers by posting json to them - I tried the same and cannot get it to work as well...

What I'm trying to do is:

$data = json_encode([...some-data...]);
 $response = $this->call(
            'POST', 'api/v1/handle', [], [], [], [], $data);

When I debug in the corresponding controller...

 public function store(Request $request)
 {
        $data = $request->all();
 }

... I can see the data (json string) is set in the Request::content property but its not available in $data when trying to retrieve it with $request->all(). When I POST from the Javascript in the frontend, which is sending plain json in the request payload everything is available from $request->all() . Whats the missing point on using ApplicationTrait::call() ?? I can't see it.