* Rename the test filename and class to match the name of the function being tested.
* Remove unnecessary `setUp()` and `tearDown()` methods.
* Replace the `only` test group with `post`.
Follow-up to [51855-51857].
See #51147.
git-svn-id: https://develop.svn.wordpress.org/trunk@51859 602fd350-edb4-49c9-b593-d223f7449a82