public void FindNextSmallestTest()
{
CreateTree();
int val;
Assert.IsTrue(m_tree.FindNextSmallest(int.MaxValue, out val));
Assert.AreEqual(5, val);
Assert.IsTrue(m_tree.FindNextSmallest(5, out val));
Assert.AreEqual(0, val);
Assert.IsTrue(m_tree.FindNextSmallest(-5, out val));
Assert.AreEqual(-999, val);
Assert.IsFalse(m_tree.FindNextSmallest(-999, out val));
}