public async Task When_VerticalScrollViewer_NotScrolled_Top()
{
VerticalScrollViewer.ChangeView(0, 0, null, disableAnimation: true);
await Task.Delay(25);
var sut = ScrollTop.TransformToVisual(VerticalScrollViewerParent);
var result = sut.TransformBounds(new Rect(0, 0, 50, 50));
Assert.AreEqual(new Rect(0, 0, 50, 50), result);
}
public async Task When_VerticalScrollViewer_Scrolled_Top()
{
var offset = _svExtent - _svHeight;
VerticalScrollViewer.ChangeView(0, offset, null, disableAnimation: true);
await Task.Delay(25);
var sut = ScrollTop.TransformToVisual(VerticalScrollViewerParent);
var result = sut.TransformBounds(new Rect(0, 0, 50, 50));
Assert.IsTrue(RectCloseComparer.UI.Equals(new Rect(0, -offset, 50, 50), result));
}