Refactoring Code Checklist

• Can the code be refactored?
  • Do you need a seam?
    • extract methods using protected not private that use the seam.
• Create Tests
• Start with the deepest branch to shortest branch
• Keep changes small and consistently retest.
• Remove complexity
• Methods should not have more than 10 lines of code
• Replace conditionals with strategy pattern.
• Remove local variables
• Remove comments – use descriptive method names.
• Remove cryptic or clever code,
• Remove abbreviated code
• Refactor with dependency injection
• Refactor using SOLID
  • Single Responsibility Principle (SRP)
  • Open Closed Design Principle
  • Liskov Substitution Principle (LSP)
  • Interface Segregation Principle
  • Dependency Inversion Principle
• Refactor using other design principles
  • Encapsulate what changes
  • Don’t Repeat Yourself (DRY)
  • Don’t look for things. Ask for things. (Dependency Injection)
  • Favor Composition over Inheritance
  • Program to the Interface not to the Implementation
  • Delegation Principles

Last updated 2/11/18