SpecialMWOAuthConsumerRegistration is the flow for registering and updating OAuth 1 and OAuth 2 consumers. It would most likely involve writing unit and integration tests to cover the functionality.
We'll likely write integration tests to cover functionality related to the Special page UI, the /propose and /update features, and their interactions with the action API and the DB (e.g., SubmitControl for the aforementioned endpoints). It's probably possible to use SpecialPageTestBase, since this will involve testing a special page and ApiTestCase for action API-related functionality.
Impact
- Increase coverage of the respective special page: https://doc.wikimedia.org/cover-extensions/OAuth/src/Frontend/SpecialPages/SpecialMWOAuthConsumerRegistration.php.html
- Increase coverage of submit control classes (T416761)

