public void Last()
        {
            var coll = new AvlBinaryTreeCollection <int>();

            coll.Clear();
            Assert.That(() => coll.Last, Throws.InvalidOperationException);
        }
        public void Clear()
        {
            var coll = new AvlBinaryTreeCollection <int>()
            {
                1
            };

            coll.Clear();
            Assert.That(coll.Count, Is.EqualTo(0));
        }
        public void Creation1()
        {
            var coll = new AvlBinaryTreeCollection <int>();

            for (int i = 0; i < 100000; i++)
            {
                coll.Add(i);
            }
            coll.Clear();
        }