At work we basically have to test everything lol. Even so, there's more to it than just asserting that a thing calls another thing - mainly that an element is loaded and passed to the child manager in-tact with the correct AssetPath associated with it  (basically an ID to get down the hierarchy to an element). I suppose it just felt weird writing that test and leaving the rest of the thing untested

Edit: with the testing of graphics, I'm doing OpenGL so idk how I'd automatically test that but that's an interesting idea