public void TestOnTouchUpMoveDown()
        {
            var view      = new Mock <IStepper>();
            var drawable  = new StepperDrawable(view.Object);
            var exception = Record.Exception(() =>
            {
                var point = new GPoint(10, 10);
                drawable.OnTouchDown(point);
                drawable.OnTouchMove(point);
                drawable.OnTouchUp(point);
            });

            Assert.Null(exception);
        }