refactoring-safely

To refactor code safely, you should establish or update tests that capture current behavior, implement small incremental changes, run tests frequently, and commit often to ensure modifications are verifiable and reversible.

A structured refactoring workflow follows a phase-driven process from preparation through validation and deployment, applying small verifiable modifications and clear rollback strategies to minimize risk and prevent regressions.

You do not need existing tests, but test-driven refactoring is required. You can add tests that capture current behavior before making changes to preserve functionality and validate incremental updates during the process.

Incremental changes should be used whenever you are improving a software project to minimize risk. Small, verifiable modifications allow you to run tests frequently and maintain a clear rollback plan if regressions occur.

Version control supports safe refactoring by enabling small commits that document incremental changes. This practice ensures each modification is reversible, providing a structured rollback plan if tests fail or regressions are detected.