refactoring

To refactor code without changing external behavior, apply a systematic workflow of strict testing, impact analysis, and incremental changes. This preserves functionality while addressing code smells and improving overall structure and maintainability.

Common code smells include long methods, god classes, and duplicate code. Fix them by applying targeted refactoring techniques like Extract Method, Replace Conditional with Polymorphism, and Introduce Parameter Object to improve design.

Break down a long method by applying the Extract Method refactoring technique. This systematic process involves impact analysis and incremental changes, ensuring all existing tests pass throughout the breakdown to maintain external behavior.

Reduce technical debt in legacy software by executing a rigid refactoring workflow. Identify code smells, apply design pattern techniques like Replace Conditional with Polymorphism, and enforce strict testing protocols to improve maintainability safely.

Use Replace Conditional with Polymorphism during refactoring when complex conditional logic creates code smells. This technique simplifies design by delegating behavior to polymorphic classes, reducing complexity while preserving external behavior through strict testing.

Yes, existing tests are required before starting a systematic refactoring workflow. The process mandates strict testing and incremental changes to ensure external behavior remains unchanged while applying techniques like Extract Method or Introduce Parameter Object.