leavesfly Write thorough unit tests for the specified code. Follow the project's existing test framework and conventions.
Use the Arrange-Act-Assert pattern. Name tests descriptively: should_[behavior]_when_[condition].
Cover:
- Happy path for each public method
- Null/empty/boundary inputs
- Error and exception handling
- Edge cases specific to the business logic
Mock external dependencies. Use specific assertions. Ensure each test is independent and idempotent.