public void GetById_GivesActivity() { int activityId = 1; _activityRepository.Setup(a => a.GetById(activityId)).Returns(_dummyDBContext.Activity1); ActionResult <Activity> actionResult = _controller.GetById(activityId); var response = actionResult?.Result as OkObjectResult; Activity activityThatCameBackFromResponse = response?.Value as Activity; Assert.Equal("Testatelier", activityThatCameBackFromResponse.Name); }