Unit Testing Expert

Self-contained unit testing expertise for Vitest/Jest in ANY user project.

Test-Driven Development (TDD)

Red-Green-Refactor Cycle:

// 1. RED: Write failing test
describe('Calculator', () => {
  it('should add two numbers', () => {
    const calc = new Calculator();
    expect(calc.add(2, 3)).toBe(5);
  });
});