public function testCanHintToApiProblemToRenderStackTrace()
 {
     $exception = new \Exception('exception message', 500);
     $apiProblem = new ApiProblem(500, $exception);
     $model = new ApiProblemModel();
     $model->setApiProblem($apiProblem);
     $this->renderer->setDisplayExceptions(true);
     $test = $this->renderer->render($model);
     $test = json_decode($test, true);
     $this->assertArrayHasKey('trace', $test);
     $this->assertInternalType('array', $test['trace']);
     $this->assertGreaterThanOrEqual(1, count($test['trace']));
 }