public void TestBSTLowest()
{
var inttree = new BinarySearchTree<int>() { 40, 11, 62, 43, 34, 16, 10, 63 };
var stringtree = new BinarySearchTree<string>() { "hello", "test", "Case", "scenario" };
var doubletree = new BinarySearchTree<double>() { 74.24, 75.1, 1.75, 64.1, 2.535, 63.2, 1.4 };
Assert.AreEqual(10, inttree.Lowest(), "\nLowest int.");
Assert.AreEqual("Case", stringtree.Lowest(), "\nLowest string.");
Assert.AreEqual(1.4, doubletree.Lowest(), "\nLowest double.");
}