public void TestAccept()
{
BinaryTree <int> t = GetTestTree();
TrackingVisitor <int> v = new TrackingVisitor <int>();
t.Accept(v);
Assert.AreEqual(v.TrackingList.Count, 6);
Assert.AreEqual(v.TrackingList.Contains(5), true);
Assert.AreEqual(v.TrackingList.Contains(2), true);
Assert.AreEqual(v.TrackingList.Contains(3), true);
Assert.AreEqual(v.TrackingList.Contains(9), true);
Assert.AreEqual(v.TrackingList.Contains(12), true);
Assert.AreEqual(v.TrackingList.Contains(13), true);
}
public void TestNullVisitor()
{
BinaryTree <int> t = GetTestTree();
t.Accept(null);
}