* Remove MonkeyPatch from tests.
- Minimal changes to default values on production scripts to allow for overrides from tests.
- Itroduces a minimal OAuth2 mock server implemented in Python.
The server can handle GET and POST requests for OpenID configuration and token
retrieval for Google and Microsoft, respectively. It is designed to facilitate
testing without the need for actual OAuth providers.
* Add tests for custom authority URL and enhance fetch_json_https functionality
* Add tests for scheme parsing and invalid host URL handling in get_imap_connection
* Add copilot instructions for running checks and writing tests
- Implement tests for counting emails in single and multiple folders, including handling of empty folders and error scenarios in `test_count_imap_emails.py`.
- Create tests for environment variable verification, IMAP connection handling, folder normalization, MIME header decoding, and message details extraction in `test_imap_common.py`.
- Develop tests for email migration, including duplicate detection, deletion from source after migration, folder creation on destination, and handling of multiple folders in `test_migrate_imap_emails.py`.
- Introduce a mock IMAP server to facilitate testing of IMAP functionalities in `tools/mock_imap_server.py`.
