clean-code-ch12-emergence

Emergent design is achieved by iteratively applying Kent Beck's four rules of simple design: ensuring all tests pass, removing duplication, maximizing expressiveness, and minimizing classes and methods.

Run an incremental design review against your codebase to surface violations of simple design rules, checking for duplication, poor expressiveness, and excessive classes to guide refactoring remediation.

Yes, a test suite is required. Ensuring all tests pass is the first rule of simple design, providing verifiable behavior and a safety net for refactoring and reducing duplication.

The Single Responsibility Principle (SRP) serves as an evaluation criterion for expressiveness. Adhering to SRP alongside Dependency Inversion ensures classes do one thing, minimizing methods and improving emergent design.

The best way to reduce duplication is performing incremental design reviews that target code smells, enforce simple design rules, and guide refactoring activities to eliminate waste and improve maintainability.