Add a new config option for OAuth2 authentication sources: allow users to change their username.
In the case where OAuth2 is more like a social OAuth2 login there's no need to not allow users to change their username. The information how the user is linked to the authentication source is stored in different fields.
Resolvesforgejo/forgejo#687
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/8714
Reviewed-by: 0ko <0ko@noreply.codeberg.org>
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Co-authored-by: Gusted <postmaster@gusted.xyz>
Co-committed-by: Gusted <postmaster@gusted.xyz>
This PR is adds almost all tests in `cmd/admin_auth_oauth_test.go` with a bit of refactoring beforehand to make the tests easier to write. These should be legitimate refactors where the implementation changes but the public API/behavior does not change. All of the changes in this PR are done to align with how tests are written in `cmd/admin_auth_ldap_test.go`. Since `cmd/admin_auth_ldap.go` is a sibling file to `cmd/admin_auth_oauth.go`, it seems like their test files should also be aligned.
There are some tests added that show the current behavior as not ideal. E.g. not being able to update certain fields, or being able to set fields that are ultimately ignored. These are added so that the behavior is at least shown a bit more visibly. There should likely be a follow-up to fix some of these issues. But that will almost certainly be a breaking change that I'd rather avoid in this PR.
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/8433
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Co-authored-by: joneshf <jones3.hardy@gmail.com>
Co-committed-by: joneshf <jones3.hardy@gmail.com>
