public void SizeTest() { BinarySearchTree<int> bst = ConstructTree(5,4,8); Assert.AreEqual(3, bst.Size(bst.RootNode)); bst = ConstructTree(5); Assert.AreEqual(1, bst.Size(bst.RootNode)); bst = new BinarySearchTree<int>(); Assert.AreEqual(0, bst.Size(bst.RootNode)); }