From if Statements to Classes: How Refactoring Taught Me Testable Code

📰 Dev.to · Enayet Rashid

Learn how refactoring can help you write testable code by transforming a simple Python calculator from if statements to classes

intermediate Published 27 Mar 2026
Action Steps
  1. Build a simple Python calculator using if statements
  2. Refactor the calculator code to use classes and objects
  3. Write unit tests for the calculator class to ensure testability
  4. Compare the readability and maintainability of the original and refactored code
  5. Apply the principles of refactoring to other projects to improve code quality
Who Needs to Know This

Developers and software engineers can benefit from this article as it provides a practical example of refactoring and writing testable code, which is essential for collaborative projects and maintaining code quality

Key Insight

💡 Refactoring can significantly improve code testability and maintainability by reducing complexity and increasing modularity

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🚀 Refactor your way to testable code! Learn how transforming if statements to classes improved a Python calculator's maintainability 🤖

Key Takeaways

Learn how refactoring can help you write testable code by transforming a simple Python calculator from if statements to classes

Full Article

I am a self-taught learner. So when I decided to build a Python calculator, I didn't start with...
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