public void Commentable_CommentOutOfOrder_Throws()
{
// Arrange
var target = new Commentable();
var firstComment = new CommentBuilder().SetupValidComment(1).Build();
var secondComment = new CommentBuilder().SetupValidComment(2).Build();
var targetComment = new CommentBuilder().SetupValidComment(2).Build(); // Repeat the order number.
target.Comment(firstComment);
target.Comment(secondComment);
// Act, Assert
Assert.Throws <BusinessException>(() => target.Comment(targetComment));
}
public void Commentable_CommentsAreAddedInIncreasingOrder_Successfully()
{
// Arrange
var target = new Commentable();
var firstComment = new CommentBuilder().SetupValidComment(1).Build();
var secondComment = new CommentBuilder().SetupValidComment(2).Build();
var thirdComment = new CommentBuilder().SetupValidComment(7).Build(); // Not back-to-back.
// Act
target.Comment(firstComment);
target.Comment(secondComment);
target.Comment(thirdComment);
// Assert
Assert.Equal(3, target.Comments.Count());
Assert.Contains(firstComment, target.Comments);
Assert.Equal(1, firstComment.OrderNumber);
Assert.Contains(secondComment, target.Comments);
Assert.Equal(2, secondComment.OrderNumber);
Assert.Contains(thirdComment, target.Comments);
Assert.Equal(7, thirdComment.OrderNumber);
}
