I would say "fairly annoying", alas! I never bothered to make Selenium etc examples, though I know some customers use it. You can switch to the SVG renderer for testing if you really want to inspect the DOM after doing actions, and some customers do this too. And you can mock events if you want to, we give some basic examples: https://gojs.net/latest/samples/Robot.html
But you have to inspect programmatically one way or another. What is easiest really depends on what, exactly, you want to test. Eg testing your permissions (can a user copy a node with these checkboxes in my app selected) can be done by trying to copy and seeing how many Parts exist before and after, etc.
But you have to inspect programmatically one way or another. What is easiest really depends on what, exactly, you want to test. Eg testing your permissions (can a user copy a node with these checkboxes in my app selected) can be done by trying to copy and seeing how many Parts exist before and after, etc.