Add unit tests for existing Python modules #5
Description
There are several Python files in the repository that lack comprehensive unit tests. To improve code reliability and maintainability, add unit tests for all core modules and functions.
Tasks:
- Identify Python files missing tests.
- Create or expand test cases for important functions and classes.
- Ensure tests cover edge cases and expected failures.
- Integrate new tests into the CI workflow.
Acceptance Criteria:
- All major Python modules have tests with at least 80% code coverage.
- Tests run successfully in the CI pipeline.