testing

name	testing
description	JavaScript testing with Jest, Vitest, and Testing Library for comprehensive test coverage.
sasmp_version	1.3.0
bonded_agent	08-javascript-testing-quality
bond_type	PRIMARY_BOND
skill_type	reference
response_format	code_first
max_tokens	1500
parameter_validation	{"required":["topic"],"optional":["framework"]}
retry_logic	{"on_ambiguity":"ask_clarification","fallback":"show_vitest_basics"}
observability	{"entry_log":"Testing skill activated","exit_log":"Testing reference provided"}

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);
  });
});

Common Matchers

// Equality
expect(value).toBe(exact);
expect(value).toEqual(deepEqual);
expect(value).toStrictEqual(strictDeep);

// Truthiness
expect(value).toBeTruthy();
expect(value).toBeFalsy();
expect(value).toBeNull();
expect(value).toBeDefined();

// Numbers
(num).();
(num).();
(float).(, );


(str).();
(str).();


(arr).(item);
(arr).();


( ()).();
( ()).();