Custom Assertion Test

custom_assertion_test.cs

    public class when_asserting_unsorted_comments_are_sorted_in_descending_order
    {
        static Exception _exception;
        static List<Comment> _unsortedComments;

        Establish context = () =>
            {
                _unsortedComments = new List<Comment>
                                        {
                                            new Comment("comment 1", DateTime.MinValue.AddDays(1)),
                                            new Comment("comment 4", DateTime.MinValue.AddDays(4)),
                                            new Comment("comment 3", DateTime.MinValue.AddDays(3)),
                                            new Comment("comment 2", DateTime.MinValue.AddDays(2))
                                        };
            };

        Because of = () => _exception = Catch.Exception(() => _unsortedComments.ShouldBeSortedByDateInDescendingOrder());

        It should_throw_an_exception = () => _exception.ShouldBeOfType(typeof(Exception));
    }

    public class when_asserting_sorted_comments_are_sorted_in_descending_order
    {
        static Exception _exception;
        static List<Comment> _unsortedComments;

        Establish context = () =>
        {
            _unsortedComments = new List<Comment>
                                        {
                                            new Comment("comment 4", DateTime.MinValue.AddDays(4)),
                                            new Comment("comment 3", DateTime.MinValue.AddDays(3)),
                                            new Comment("comment 2", DateTime.MinValue.AddDays(2)),
                                            new Comment("comment 1", DateTime.MinValue.AddDays(1))
                                        };
        };

        Because of = () => _exception = Catch.Exception(() => _unsortedComments.ShouldBeSortedByDateInDescendingOrder());

        It should_not_throw_an_exception = () => _exception.ShouldBeNull();
    }