1. It makes sense to reuse these constants since we had them duplicated
in the previous enum implementation. This also simplifies our
`check_access` implementation, because we can use
`project.team.max_member_access` directly.
2. Use `accepts_nested_attributes_for` to create push/merge access
levels. This was a bit fiddly to set up, but this simplifies our code
by quite a large amount. We can even get rid of
`ProtectedBranches::BaseService`.
3. Move API handling back into the API (previously in
`ProtectedBranches::BaseService#translate_api_params`.
4. The protected branch services now return a `ProtectedBranch` rather
than `true/false`.
5. Run `load_protected_branches` on-demand in the `create` action, to
prevent it being called unneccessarily.
6. "Masters" is pre-selected as the default option for "Allowed to Push"
and "Allowed to Merge".
7. These changes were based on a review from @rymai in !5081.
1. Align "Allowed to Merge" and "Allowed to Push" dropdowns.
2. Don't display a flash every time a protected branch is updated.
Previously, we were using this so the test has something to hook onto
before the assertion. Now we're using `wait_for_ajax` instead.
1. The model now contains this humanization data, which is the once
source of truth.
2. Previously, this was being listed out in the dropdown component as well.
1. Get the existing spec passing.
2. Add specs for all the access control options, both while creating and
updating protected branches.
3. Show a flash notice when updating protected branches, primarily so
the spec knows when the update is done.
1. Modify the component to support a callback for every key press in the
filter. We need this so we can update the "Create: <branch_name"
label.
2. Modify the component to use `$(<selector>).first().click()` instead
of `$(selector)[0].click()`, because the latter is non-standard, and
doesn't work in PhantomJS.
1. Doesn't seem like there's an easy way to do this for the actual
branch protection, since we'd have to test an actual `git push`.
2. Testing branch creation the web UI is also not straightforward,
since the factory repo doesn't have any hooks, and so access checks
at the `gitlab-shell` level aren't run.
