Question Testing VisualElement events for Editor UIs

I've been working on some Editor UIs using the new UI Toolkit, and writing basic unit tests directly inspecting the

VisualElement

hierarchy has been very nice. However, when it comes to events, a panel is required, as event processing seems to be essentially disabled if there is no panel.

My problem is that

VisualElement

can only use

BaseVisualElementPanel

as its panel type, and the class itself and all deriving classes, as well as

VisualElement.SetPanel

have internal visibility. So I can't find any way to make events fire for the

VisualElement

s I've instantiated in my tests.

What I'd essentially like to do is something like this:

Code (CSharp):

1. var root = new VisualElement();
2.  
3. // This sets up subviews that use RegisterValueChangedCallback on a TextField
4. var myView = new MyView(root);
5.  
6. root.Query<TextField>().AtIndex(0).value = "foo";
7. // Assert that the visual tree is in the expected state

Is there any way to achieve this?