public Question Store(Question question)
{
Condition.Requires(question).IsNotNull();
// First, validate the question.
ValidateQuestion(question);
if (question.IdAsANumber > 0)
{
var existingQuestion = DocumentSession.Load<Question>(question.Id);
if (existingQuestion != null)
{
existingQuestion.Subject = question.Subject;
existingQuestion.Content = question.Content;
existingQuestion.Tags = question.Tags;
existingQuestion.CreatedByUserId = question.CreatedByUserId;
question = existingQuestion;
}
}
// Save.
DocumentSession.Store(question);
return question;
}
public void GivenAnQuestionWithInvalidData_Create_StoresAQuestion()
{
// Arrange.
Question question = new Question(); // Empty, invalid question
var documentSession = new Mock<IDocumentSession>();
IQuestionService questionService = new QuestionService(documentSession.Object);
// Act & Assert.
Assert.Throws<ValidationException>(() => questionService.Create(question));
}
public Question Create(Question question, IDocumentSession documentSession)
{
Condition.Requires(question).IsNotNull();
Condition.Requires(documentSession).IsNotNull();
// First, validate the question.
Validator.ValidateObject(question, new ValidationContext(question, null, null), true);
Condition.Requires(question.Tags).IsNotNull().IsLongerThan(0);
// Save.
documentSession.Store(question);
return question;
}
private static void ValidateQuestion(Question question)
{
Condition.Requires(question).IsNotNull();
Condition.Requires(question.Subject)
.IsNotNullOrEmpty()
.Evaluate(x => x.Length >= 5, "A subject is required and needs to be at least 5 characters.");
Condition.Requires(question.Content)
.IsNotNullOrEmpty()
.Evaluate(x => x.Length >= 5, "Some content is required and needs to be at least 5 characters.");
Condition.Requires(question.Tags)
.IsNotNull()
.IsNotEmpty("At least one valid tag is required.");
}
