AgentSkillsCN

jest

Jest 配置、模拟策略、快照测试与代码覆盖率分析。

SKILL.md
--- frontmatter
name: jest
description: Jest configuration, mocking strategies, snapshot testing, and coverage.
allowed-tools: Read, Write, Edit, Bash, Glob, Grep

Jest Skill

Expert assistance for testing with Jest.

Capabilities

  • •Configure Jest for various frameworks
  • •Implement mocking strategies
  • •Write snapshot tests
  • •Configure coverage
  • •Handle async testing

Test Patterns

typescript
describe('UserService', () => {
  let service: UserService;
  let mockRepository: jest.Mocked<UserRepository>;

  beforeEach(() => {
    mockRepository = {
      findAll: jest.fn(),
      findById: jest.fn(),
      create: jest.fn(),
    };
    service = new UserService(mockRepository);
  });

  it('should return all users', async () => {
    mockRepository.findAll.mockResolvedValue([{ id: '1', name: 'John' }]);

    const result = await service.findAll();

    expect(result).toHaveLength(1);
    expect(mockRepository.findAll).toHaveBeenCalled();
  });
});

Target Processes

  • •unit-testing
  • •integration-testing
  • •tdd-development