<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=412366) </details> <!--IssueSummary end--> When https://gitlab.com/gitlab-org/gitlab/-/merge_requests/120931+ was merged, the [undercoverage job](https://gitlab.com/gitlab-org/gitlab/-/jobs/4318840210) revealed some test gaps. We should address the following: - [ ] [object_importer](https://gitlab.com/gitlab-org/gitlab/-/tree/master/app/workers/concerns/gitlab/bitbucket_server_import/object_importer.rb) * [ ] `import` method * [ ] `importer_class` method - [ ] [advance_stage_worker](https://gitlab.com/gitlab-org/gitlab/-/tree/master/app/workers/concerns/gitlab/bitbucket_server_import/advance_stage_worker.rb) * [ ] `find_import_state` method * [ ] `next_stage_worker` method - [ ] [pull_request_notes_importer](https://gitlab.com/gitlab-org/gitlab/-/tree/master/lib/gitlab/bitbucket_server_import/importers/pull_request_notes_importer.rb) * [ ] `create_diff_note` method * [ ] `create_fallback_diff_note` method - [ ] [pull_request_notes_importer](https://gitlab.com/gitlab-org/gitlab/-/tree/master/lib/gitlab/bitbucket_server_import/importers/pull_request_notes_importer.rb) * [ ] `create_diff_note` method - [ ] [loggable.rb](https://gitlab.com/gitlab-org/gitlab/-/tree/master/lib/gitlab/bitbucket_server_import/loggable.rb) * [ ] `log_warn` method * [ ] `log_error` method - [ ] [parallel_scheduling.rb](https://gitlab.com/gitlab-org/gitlab/-/tree/master/lib/gitlab/bitbucket_server_import/parallel_scheduling.rb) * [ ] `id_for_already_processed_cache ` method * [ ] `sidekiq_worker_class` method * [ ] `collection_method ` method