JavaScript Testing Skill

Quick Reference Card

Vitest/Jest Basics

import { describe, it, expect, vi, beforeEach } from 'vitest';

describe('Calculator', () => {
  it('adds numbers', () => {
    expect(add(2, 3)).toBe(5);
  });

  it('handles edge cases', () => {
    expect(add(0, 0)).toBe(0);
    expect(add(-1, 1)).toBe(0);
  });
});