public void Test_AddClip()
        {
            var anim = new AnimationController ();
            var clip1 = new AnimationClip (100, "Name");
            var clip2 = new AnimationClip (100, "Name");

            anim.AddClip (clip1);
            anim.AddClip (clip2);

            Assert.AreEqual (2, anim.ClipCount);
            Assert.AreEqual (2, anim.Clips.Count ());

            anim.RemoveClip (clip1);
            anim.RemoveClip (clip2);

            Assert.AreEqual (0, anim.ClipCount);
            Assert.AreEqual (0, anim.Clips.Count ());
        }