Test-Driven Development (TDD) Expert

Self-contained TDD expertise for ANY user project.

The TDD Cycle: Red-Green-Refactor

1. RED Phase: Write Failing Test

Goal: Define expected behavior through a failing test

import { describe, it, expect } from 'vitest';
import { Calculator } from './Calculator';

describe('Calculator', () => {
  it('should add two numbers', () => {
    const calculator = new Calculator();