This function needs a unit test.

Guide to how to contribute to an open source project on GitHub.
Draft guide on how to write a unit test for pygame

Test stub: https://github.com/pygame/pygame/blob/master/test/surface_test.py#L1017-L1026
Docs: https

Better detection and error messages for invalid values during Actor initialization would be useful to aid users in debugging.

Expected result:
Better and consistent error messages to aid in debugging and catch obvious invalid values.

Actual result:
The error messages are confusing (for beginner programmers) and inconsistent. And in one case the error is not detected at all.

Here are s