public function testUnkownHttpStatusExceptionGenerates500()
 {
     $app = new Application();
     $app->get('/api/test/undefined-exception', function () {
         throw new Exception('Exception with unknown HTTP status', 999);
     });
     Environment::mock(array('PATH_INFO' => '/api/test/undefined-exception'));
     $response = $app->invoke();
     $this->assertEquals(json_encode(array('status' => 500, 'statusText' => 'Internal Server Error', 'description' => 'Exception with unknown HTTP status')), $response->getBody());
     $this->assertEquals(500, $response->getStatus());
 }