public void SortedArrayToBSTTest()
{
TreeNode root = new TreeNode(0);
root = Utility.BuildTree(root, new int?[] { 3, 9, 20, null, null, 15, 7 }, 0);
Solution107 solution107 = new Solution107();
IList <IList <int> > actual = solution107.LevelOrderBottom(root);
Assert.AreEqual(new int[] { 15, 7 }, actual[0]);
Assert.AreEqual(new int[] { 9, 20 }, actual[1]);
Assert.AreEqual(new int[] { 3 }, actual[2]);
}
public void TestMethod(TreeNode root, IList <IList <int> > output)
{
Assert.Equal(output, Solution107.LevelOrderBottom(root));
}