单元测试在HTTP响应中呈现异常？

How to test if render() an exception into an HTTP response working correctly. I want to test without calling $this->get()

This is a method in Laravel:

  public function render($request, Exception $e)
  {
        $response['exception'] = get_class($e);
        $response['message'] = $e->getMessage();

        if ($e instanceof LockException) {
            return $this->errorResponse('lock', $response, 'Lock error has occurred', $e->getCode());
        }

        return parent::render($request, $e);
    }

I need to test if LockException has turn into an HTTP response.

Something like this. In your test, instantiate the controller into a variable, create a blank request and pass in your LockException:

$response = $controller->render($request, $exception);
$this->assertEquals('string of HTML you expect', $response);