Inconsistent capitalization of Set in assertion functions

[John Litborn]

FormSet and QuerySet for some reason doesn't have a capitalized S in assertFormsetError and assertQuerysetEqual, whereas all other instances of camel-cased names in the codebase containing either of them have capitalized S's: (InlineAdminFormSet, Base[...]FormSet, EmptyQuerySet, RawQuerySet).

Looking at the other assertion methods inherited from unittest.TestCase they're incredibly cased (e.g. assertMultiLineEqual) so I'm not finding any convention of not uppercasing liberally.

My suggestion is to rename assertFormsetError->assertFormSetError and assertQuerysetEqual->assertQuerySetEqual in django.test.TestCase and add aliases for the old names so as not to break existing code. In the code base this is a quite small change, but there's likely some docs (and e.g. the tutorial) that might warrant updating to new spelling. Could also (down the line) add a deprecationwarning to get rid of the old spelling if you want a cleaner API interface.

This bit me as I was following the tutorial and re-typing the code instead of copy-pasting, so it's plausible that others might encounter it similarly if they don't have an IDE that suggests the alternate spelling.

[Carlton Gibson]

OK — I'm not 100% convinced this is worth the change, so if someone wants to mark it wontfix I won't complain, but… —  let's accept as a cleanup for the assertFormsetError and assertQuerysetEqual methods.

• Uses in Django will need to be updated.
• The old names will need to be deprecated. (Let's not have two versions floating around...)
• A matching Issue/PR should be created on The ​django-upgrade project when this goes in.

[Michael Howitz]

Taking over the assignment as I am on a sprint and able to work on it.

[David Sanders]

Just checking the docs to see how things are named there compared to the code: Looks like QuerySet is capitalised as per code but "Formset" tends to use classic sentence casing:

ie see how QuerySet is used in a sentence: ​https://docs.djangoproject.com/en/4.1/ref/models/querysets/

compared to how "formset" is used in a sentence: ​https://docs.djangoproject.com/en/4.1/topics/forms/formsets/

[Michael Howitz]

The issue in django-upgrade is ​https://github.com/adamchainz/django-upgrade/issues/252.

[Michael Howitz]

The PR in django-upgrade is ​https://github.com/adamchainz/django-upgrade/pull/253.

[Mariusz Felisiak]

​PR

[Mariusz Felisiak <felisiak.mariusz@…>]

In 564b317f:

Refs #33990 -- Renamed SimpleTestCase.assertFormsetError() to assertFormSetError().

Co-Authored-By: Michael Howitz <mh@…>

[Mariusz Felisiak <felisiak.mariusz@…>]

In f0c06f8a:

Refs #33990 -- Renamed TransactionTestCase.assertQuerysetEqual() to assertQuerySetEqual().

Co-Authored-By: Michael Howitz <mh@…>

[Mariusz Felisiak <felisiak.mariusz@…>]

In c35fd9e2:

Refs #33990 -- Removed SimpleTestCase.assertFormsetError() per deprecation timeline.

[Mariusz Felisiak <felisiak.mariusz@…>]

In 69af3bea:

Refs #33990 -- Removed TransactionTestCase.assertQuerysetEqual() per deprecation timeline.