test: rename tests to use identifiers

[agoose77]

This PR fixes a minor annoyance that both @lobis and I have run in to. PyCharm, our preferred editor, requires that tests are importable in order to correctly detect the PyTest configuration.

If no-one has a strong reason to keep our non-identifier naming convention, this makes it possible to run individual unit-tests from PyCharm's test runner

[codecov]

Codecov Report

Merging #2044 (6dc1c4c) into main (492368e) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

[jpivarski]

So this means no more hyphens in test file names? That's okay, and I'd be surprised if anyone else on the team has an opinion on that.

I started using hyphens because it allows for some readability distinctions in names: e.g. "test_9999-change-from_buffers-arguments.py" where "from_buffers" is an identifier in a sentence or phrase, with hyphens taking the role of spaces (and sometimes dots: "change-ak-from_buffers").

Emacs Lisp has trained me to see hyphens as spaces, with function names like tool-bar-add-item-from-menu and variable names like switch-to-buffer-preserve-window-point.

Hyphens in file names can also be a good way to ensure that a script is a script, not importable as a module. But you want to do the opposite here. So yes, let's merge this!

[agoose77]

In general, I like the fact that we have hyphenated names (for the reasons that you give). But, as you note, I want to change that in this case to solve a tooling problem :)