public async void SaveTest()
{
// Arrange
var mockLogManager = new Mock <ILogManager>();
var mockContactRepository = new Mock <IContactRepository>();
var mockContact = new Mock <IContact>();
var mockContactValidator = new Mock <IContactValidator>();
var mockAddressApplicationService = new Mock <IAddressApplicationService>();
// Setup mock methods/properties
mockContactRepository.Setup(x => x.SaveAsync(It.IsNotNull <IContact>()))
.Returns(Task.FromResult(new SaveResponse <IContact> {
Message = "Successful."
}));
mockContactValidator.Setup(x => x.ValidateAsync(It.IsNotNull <IContact>(), CancellationToken.None))
.Returns(Task.FromResult(new ValidationResult()));
// Act
var sut = new ContactApplicationService(
mockLogManager.Object, mockContactRepository.Object, mockContactValidator.Object, mockAddressApplicationService.Object);
var response = await sut.SaveAsync(mockContact.Object);
// Assert
response.IsSuccessful.Should().BeTrue();
response.Errors.Count.Should().Be(0);
response.Message.Should().NotBeNullOrEmpty();
// Verify the application service is calling the correct repository method.
mockContactRepository.Verify(x => x.SaveAsync(It.IsAny <IContact>()));
// Verify the application service is calling the validator
mockContactValidator.Verify(x => x.ValidateAsync(It.IsNotNull <IContact>(), CancellationToken.None));
}