public async Task ContentIsEmpty_Called_ThrowArgumentNullException() {
// Arrange
var createTweetInputModel = new CreateTweetInputModel {
Content = null
};
var userId = Guid.NewGuid();
var userRepository = new Mock<IUserRepository>();
userRepository.Setup(ur => ur.AddTweet(userId, It.IsAny<Tweet>())).Verifiable();
var createTweetCommand = new CreateTweetCommand(createTweetInputModel, userId);
var createTweetCommandHandler = new CreateTweetCommandHandler(userRepository.Object);
// Act
Func<Task> funcHandle = () => createTweetCommandHandler.Handle(createTweetCommand, new CancellationToken());
// Assert
var exception = await Assert.ThrowsAsync<ArgumentException>(funcHandle);
Assert.Equal("Content parameter is invalid.", exception.Message);
}
public async Task InputDataOk_Called_ReturnViewModelWithCorrectValues() {
// Arrange
var fixture = new Fixture();
var createTweetInputModel = fixture.Create<CreateTweetInputModel>();
var userId = Guid.NewGuid();
var userRepository = new Mock<IUserRepository>();
userRepository.Setup(ur => ur.AddTweet(userId, It.IsAny<Tweet>())).Verifiable();
var createTweetCommand = new CreateTweetCommand(createTweetInputModel, userId);
var createTweetCommandHandler = new CreateTweetCommandHandler(userRepository.Object);
// Act
var createTweetViewModel = await createTweetCommandHandler.Handle(createTweetCommand, new CancellationToken());
// Assert
Assert.NotNull(createTweetViewModel);
Assert.Equal(createTweetInputModel.Content, createTweetViewModel.Content);
Assert.Equal(userId, createTweetViewModel.UserId);
userRepository.Verify(ur => ur.AddTweet(userId, It.IsAny<Tweet>()), Times.Once);
}
