Scroll in a ScrollView

To simulate a scroll, use the ScrollWheel() method from the PanelSimulator class.

The following example shows how to simulate scrolling inside a ScrollView:

[Test]
public void ScrollExample()
{
    // Make sure the UI is totally up to date.
    simulate.FrameUpdate();

    // Fetch the scrollView.
    var scrollView = rootVisualElement.Q<ScrollView>("MyScrollView");

    var scrollViewStateBefore = scrollView.scrollOffset;

    // Send events to scroll the mouse wheel.
    simulate.ScrollWheel(new Vector2(0, 0.5f),
        rootVisualElement.worldBound.center);
    simulate.FrameUpdate();

    Assert.That(scrollView.scrollOffset, Is.Not.EqualTo(scrollViewStateBefore));
}

Additional resources