- Make use of `test.MockVariableValue` to override variables for the
duration of the test.
- Don't needlessly call `onGiteaRun`, its only needed when a HTTP server
needs to be called by the code.
- When `onGiteaRun` is used, make use of the passed parameters, such as
the passed `*testing.T` variable and `*url.URL` (this also avoids
needing to serve the routers in the test code again).
- Use `(*url.URL).JoinPath` to craft new URLs.
- Don't override `setting.AppURL` & `setting.Database.LogSQL` when its
does not affect the test.
- Add empty fixture files for `FederatedUser` & `FederationHost` so they
are truncated and do not persist between tests.
An instance-wide actor is required for outgoing signed requests that are
done on behalf of the instance, rather than on behalf of other actors.
Such things include updating profile information, or fetching public
keys.
Signed-off-by: Gergely Nagy <forgejo@gergo.csillger.hu>