public void CreateInvalidTopicReturnsBadRequestPassed()
{
var topicWithoutTitle = new TopicCreateDto()
{
Body = "test body",
UserId = 1
};
_controller.ModelState.AddModelError("Title", "Required");
var badResponse = _controller.CreateTopic(topicWithoutTitle);
Assert.IsType <BadRequestObjectResult>(badResponse.Result);
}
