public async Task DeleteTest() { //Arrange const long id = 1; //Act var mockService = new Mock <ICustomerService>(); var mockMapper = new Mock <IMapper>(); //Assert var mockFacade = new CustomerFacade(mockService.Object, mockMapper.Object); try { await Assert.ThrowsAsync <Exception>(() => mockFacade.DeleteAsync(id)); } catch (AssertActualExpectedException exception) { Assert.Equal("(No exception was thrown)", exception.Actual); } }