Test review A-D, #259

[paulirwin]

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Test review for core A-D tests

Fixes #259 (as the final PR for this issue)

Description

Add missing comments and attributes, match formatting, remove unnecessary code, etc.

[NightOwl888]

Thanks for the PR. The final PR of #259. Nice work!

There are a few changes to make to this before we can merge it. Plus, it came to my attention that there are some other things we need to review and fix before the release that we will need some issues opened for. Please see my comments inline.