public void IEnumerableCountWorksForDawg()
{
var fruit = new [] {"apple", "banana", "orange"};
var dawg = fruit.ToDawg (f => f, f => true);
Assert.IsTrue (dawg ["apple"]);
Assert.IsTrue (dawg ["banana"]);
Assert.IsTrue (dawg ["orange"]);
Assert.IsFalse (dawg ["kiwi"]);
Assert.AreEqual (3, dawg.Count ());
}