Agile Software Development: Refactoring

Learn the basics of refactoring for agile software development. Explore refactoring techniques to simplify code, remove duplication, and build more reusable objects.

Introduction

• Refactoring for better code
• What you need to know

1. Refactoring with New Code

• What is refactoring?
• Test-driven development (TDD)
• Code kata
• Setting up the new code kata
• Setting up the TDD environment
• Refactoring: Rename Variable
• Micro-refactoring
• Refactoring: Inline Code
• Code kata: Continue solving the problem
• Refactoring: Extract Method

2. Stabilizing Legacy Code

• Technical debt: Why it’s a problem
• Setting up the legacy code kata
• Methodology
• Start writing pin-down tests
• Complete writing pin-down tests
• Refactoring pin-down tests
• Refactoring: Change Signature
• Code coverage
• Branch coverage

3. Refactoring Legacy Code

• Refactoring: Extract Constant strings
• Refactoring: Extract Constant numbers
• Refactoring: Extract Variable/Extract Method
• Refactoring: Simplify Arithmetic
• Refactoring: Simplify Booleans
• Refactoring: Group-Related Logic
• Refactoring: Final steps
• Add new behavior to refactored code

Conclusion

• Next steps