public async Task GetTest() { //Arrange var customer = new CustomerMngt.Domain.Entities.Customer { Id = 1, Password = "******", Email = "*****@*****.**", Surname = "Surname", FirstName = "First Name" }; var customerResponseDto = new CustomerResponseDto { Id = 1, Email = "*****@*****.**", Surname = "Surname", FirstName = "First Name", FullName = "First Name Surname" }; var filterDto = new CustomerFilterDto { Id = 1 }; var filter = new CustomerFilter { Id = 1 }; //Act var mockService = new Mock <ICustomerService>(); var mockMapper = new Mock <IMapper>(); mockMapper.Setup(x => x.Map <CustomerResponseDto>(customer)).Returns(customerResponseDto); mockMapper.Setup(x => x.Map <CustomerFilter>(filterDto)).Returns(filter); mockService.Setup(x => x.GetByFilterAsync(filter)).ReturnsAsync(customer); //Assert var mockFacade = new CustomerFacade(mockService.Object, mockMapper.Object); var result = await mockFacade.GetByFilterAsync(filterDto); Assert.Equal(customer.Id, result.Id); }