public void TestMeasure(double availableWidth, double availableHeight)
        {
            var view     = new Mock <IStepper>();
            var drawable = new StepperDrawable(view.Object);
            var size     = drawable.Measure(availableWidth, availableHeight);

            Assert.Equal(new Size(DeviceInfo.ScalingFactor, DeviceInfo.ScalingFactor), size);
        }
        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);
        }
        public void TestDraw(bool isEnabled)
        {
            var view     = new Mock <IStepper>();
            var canvas   = new Mock <ICanvas>();
            var drawable = new StepperDrawable(view.Object);

            drawable.IsEnabled = isEnabled;
            Assert.Equal(isEnabled, drawable.IsEnabled);

            var exception = Record.Exception(() =>
            {
                drawable.Draw(canvas.Object, new RectF(0, 0, 100, 100));
            });

            Assert.Null(exception);
        }