public void GetAllPassengersByGenderReturnsNotFound() { // Arrange _mockBookingService.Setup(x => x.GetAllPassengersByGender(It.IsAny <GenderType>())).Returns(new List <Person>()); // Act var result = _controller.GetAllPassengersByGender(GenderTypeViewModel.Male); // Assert Assert.IsType <NotFoundResult>(result.Result); }