Test-Driven Development (TDD)

What problem does it solve?

This Skill guides you through the Test-Driven Development (TDD) methodology, ensuring you write robust, well-designed, and maintainable code. It helps prevent bugs, improves code quality, and provides a safety net for refactoring, ultimately saving development time and reducing technical debt.

Core Features & Use Cases

• Red-Green-Refactor Cycle: Master the iterative process of writing failing tests, making them pass, and improving code design.
• FIRST Principles: Apply principles for Fast, Isolated, Repeatable, Self-validating, and Timely tests.
• pytest Best Practices: Utilize pytest fixtures, proper mocking, and descriptive test naming conventions.
• Use Case: You need to implement a new ShoppingCart class. Use TDD to write a failing test for adding an item, then implement the minimal code to pass it, and finally refactor for better design, repeating the cycle for other features like removing items or calculating totals.

Quick Start

Explain the Red-Green-Refactor-Commit cycle for implementing a simple Calculator class with an add method, including an example of a failing test, passing implementation, and refactoring step.