public async void DeleteFeedbackByID_IfIDExist_Expected204StatusCode() { //Arrange //create new mappedProfile var profile = new MappedProfile(); var configuration = new MapperConfiguration(x => x.AddProfile(profile)); var mapper = new Mapper(configuration); //Mock repo var feedbackrepo = new Mock <IFeedbackRepository>(); feedbackrepo.Setup(x => x.Delete <Feedback>(It.IsAny <Feedback>())); feedbackrepo.Setup(x => x.GetFeedbackByID(It.IsAny <int>(), It.IsAny <Boolean>(), It.IsAny <Boolean>())) .Returns(Task.FromResult(new Feedback())); feedbackrepo.Setup(x => x.Save()).Returns(Task.FromResult(true)); //create actionDescriptor var action = new List <ActionDescriptor>(); var descriptorProvider = new Mock <ActionDescriptorCollectionProvider>(); descriptorProvider.Setup(x => x.ActionDescriptors).Returns(new ActionDescriptorCollection(action, 0)); //create controller var controller = new FeedbackController(feedbackrepo.Object, mapper, descriptorProvider.Object); //Act var result = await controller.DeleteFeedbackByID(1); var contentResult = result as NoContentResult; //Assert Assert.Equal(204, contentResult.StatusCode); }