public void Arrange_Should_Set_Viewport_And_Extent_In_That_Order()
{
var target = new ScrollContentPresenter
{
Content = new Border { Width = 40, Height = 50 }
};
var set = new List<string>();
target.Measure(new Size(100, 100));
target.GetObservable(ScrollViewer.ViewportProperty).Skip(1).Subscribe(_ => set.Add("Viewport"));
target.GetObservable(ScrollViewer.ExtentProperty).Skip(1).Subscribe(_ => set.Add("Extent"));
target.Arrange(new Rect(0, 0, 100, 100));
Assert.Equal(new[] { "Viewport", "Extent" }, set);
}
public void Arrange_Should_Not_Set_Viewport_And_Extent_With_IScrollable()
{
var target = new ScrollContentPresenter
{
Content = new TestScrollable()
};
var changed = false;
target.Measure(new Size(100, 100));
target.GetObservable(ScrollViewer.ViewportProperty).Skip(1).Subscribe(_ => changed = true);
target.GetObservable(ScrollViewer.ExtentProperty).Skip(1).Subscribe(_ => changed = true);
target.Arrange(new Rect(0, 0, 100, 100));
Assert.False(changed);
}
