public void AddShiftMissingEmployeeId() { ProposedShift proposedShift = new ProposedShift() { dateTime = new DateTimeOffset(), ShiftId = new Guid() }; var mockRepository = new Mock <INowRepository>(); var controller = new ScheduleController(mockRepository.Object); var response = controller.AddShift(proposedShift); Assert.Equal("Invalid Data", response.Value); }