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Api contract tester

Skill AtulPurohit/Antigravity-Awesome-Skills/plugins/dx-qa-automation/skills/api-contract-tester

Installable GitHub library of 300+ professional agentic skills for Claude Code, Antigravity IDE, Gemini CLI, Cursor, and Copilot. Features a custom NPX installer, 9 stack-specific bundles, validation schemas, security auditing, and an interactive catalog explorer app.

Install
npx -y skills add AtulPurohit/Antigravity-Awesome-Skills --skill api-contract-tester

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What its author says it does

Copied from the file, not written here

Implement consumer-driven contract testing with Pact to ensure API compatibility.

SKILL.md

1.8 KB, as published. Nobody here has run it

API Contract Tester

Purpose

Prevent API breaking changes from reaching production by testing contracts between services.

Pact Contract Testing

Consumer Test

const { Pact, like, term } = require('@pact-foundation/pact');

const provider = new Pact({ consumer: 'WebApp', provider: 'UsersAPI', port: 1234 });

test('GET /users/:id returns user', async () => {
  await provider.addInteraction({
    state: 'user 123 exists',
    uponReceiving: 'a request for user 123',
    withRequest: { method: 'GET', path: '/users/123', headers: { Accept: 'application/json' } },
    willRespondWith: {
      status: 200,
      body: {
        id: '123',
        email: like('[email protected]'),
        name: like('John Doe'),
        role: term({ generate: 'user', matcher: '^(user|admin)$' }),
      },
    },
  });
  const user = await UserService.getUser('123');
  expect(user.id).toBe('123');
});

Provider Verification

test('verifies consumers', () =>
  new Verifier({
    provider: 'UsersAPI',
    providerBaseUrl: 'http://localhost:3000',
    pactUrls: ['./pacts/WebApp-UsersAPI.json'],
    stateHandlers: {
      'user 123 exists': () => db.users.upsert({ id: '123', email: '[email protected]' }),
    },
  }).verifyProvider()
);

Outputs

  1. Consumer pact tests
  2. Provider verification setup
  3. Pact broker configuration
  4. CI/CD contract testing integration
  5. Contract versioning strategy

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