Suppose you're introducing unit tests for a legacy Go codebase with minimal test coverage. What steps would you take to gradually improve test coverage and ensure backward compatibility with existing code?
- Avoid writing tests for legacy code and focus only on testing new features
- Identify critical paths and prioritize writing tests for them
- Leave the codebase as is and rely solely on manual testing for backward compatibility
- Rewrite the entire codebase from scratch to ensure comprehensive test coverage
When introducing unit tests for a legacy codebase with minimal test coverage, it's essential to identify critical paths and prioritize writing tests for them. This approach ensures that the most critical parts of the codebase are adequately tested, improving overall test coverage gradually. Rewriting the entire codebase is impractical and costly. Avoiding writing tests for legacy code or relying solely on manual testing compromises the reliability and maintainability of the codebase. By prioritizing critical paths and gradually adding tests, backward compatibility with existing code can be ensured while improving test coverage.
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