public void CompareShouldReturnYMinusX()
{
DescendingOrderComparer target = new DescendingOrderComparer();
var actual = target.Compare(3, 5);
Assert.AreEqual(2, actual);
}
public void OrderByShouldBeDescending()
{
DescendingOrderComparer target = new DescendingOrderComparer();
var arr = new[] { 3, 1, 5, 2, 4 };
var sorted = arr.OrderBy(item => item, target).ToArray();
CollectionAssert.AreEqual(new[] { 5, 4, 3, 2, 1 }, sorted);
}