public async Task <Result <Book> > Handle(UpdateBookCommand command)
{
var author = await _unitOfWork.AuthorRepository.FindAsync(command.AuthorId);
if (author is null)
{
return(Result.Failure <Book>("Author not found"));
}
Result <Title> titleResult = Entities.Books.Title.Create(command.Title);
if (titleResult.IsFailure)
{
return(Result.Failure <Book>(titleResult.Error));
}
Result <Description> descriptionResult = RequiredDescription.Create(command.Description);
if (descriptionResult.IsFailure)
{
return(Result.Failure <Book>(descriptionResult.Error));
}
var book = await _unitOfWork.BookRepository.FindAsync(command.BookId);
book.EditBook(titleResult.Value, descriptionResult.Value, author);
_unitOfWork.BookRepository.Update(book);
await _unitOfWork.SaveChangesAsync();
return(Result.Success(book));
}
public void Create_RequiredDescription_Should_Fail_For_EmptyValue()
{
//Arrange
var requiredDescription = string.Empty;
//Act
var result = RequiredDescription.Create(requiredDescription);
//Assert
result.IsFailure.Should().BeTrue();
result.Error.Should().Be("Description is required.");
}
public void Create_RequiredDescription_Should_Create_For_ValidValue()
{
//Arrange
var fixture = new Fixture();
var requiredDescription = fixture.Create <string>();
//Act
var result = RequiredDescription.Create(requiredDescription);
//Assert
result.IsSuccess.Should().BeTrue();
result.Value.Value.Should().Be(requiredDescription.Trim());
}
public void Create_RequiredDescription_Should_Fail_For_MoreThan1500CharacterValue()
{
//Arrange
var fixture = new Fixture();
var requiredDescription = string.Join(string.Empty, fixture.CreateMany <string>(100));
//Act
var result = RequiredDescription.Create(requiredDescription);
//Assert
result.IsFailure.Should().BeTrue();
result.Error.Should().Be("Description is too long.");
}