Vitest

Skill a5c-ai/babysitter/library/specializations/web-development/skills/vitest

Babysitter enforces obedience on agentic workforces and enables them to manage extremely complex tasks and workflows through deterministic, hallucination-free self-orchestration

Install

npx -y skills add a5c-ai/babysitter --skill vitest

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What its author says it does

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Vitest configuration, mocking, coverage, snapshot testing, and performance.

SKILL.md

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Vitest Skill

Expert assistance for unit and integration testing with Vitest.

Capabilities

Configure Vitest for projects
Write unit and integration tests
Implement mocking strategies
Configure coverage reporting
Optimize test performance

Test Patterns

import { describe, it, expect, vi, beforeEach } from 'vitest';
import { render, screen } from '@testing-library/react';
import { UserService } from './user.service';

describe('UserService', () => {
  const mockDb = { user: { findMany: vi.fn() } };

  beforeEach(() => {
    vi.clearAllMocks();
  });

  it('should fetch users', async () => {
    mockDb.user.findMany.mockResolvedValue([{ id: '1', name: 'John' }]);

    const service = new UserService(mockDb);
    const users = await service.findAll();

    expect(users).toHaveLength(1);
    expect(mockDb.user.findMany).toHaveBeenCalledOnce();
  });
});

Configuration

// vitest.config.ts
export default defineConfig({
  test: {
    globals: true,
    environment: 'jsdom',
    coverage: {
      provider: 'v8',
      reporter: ['text', 'html'],
    },
  },
});

Target Processes

unit-testing
react-testing
tdd-development