public void It_reports_no_containers_correctly()
{
var cargo = new Bag("blue", "light");
Assert.AreEqual(new HashSet <Bag>(), cargo.GetTransitiveContainers(cargo));
}
public void Bag_reports_zero_contents_if_it_contains_no_other_bags()
{
Bag bag = new Bag("blue", "light");
Assert.AreEqual(0, bag.GetTransitiveContentCount());
}
