opensearch-project/agent-health/write-test

// ✅ Correct
import { myFunction } from '@/services/myService';
// ❌ Wrong
import { myFunction } from '../../services/myService';

/* Copyright OpenSearch Contributors
 SPDX-License-Identifier: Apache-2.0 */
import { functionUnderTest } from '@/path/to/module';
describe('functionUnderTest', () => {
  beforeEach(() => {
    jest.clearAllMocks();
  });
  it('should handle the happy path', () => {
    const result = functionUnderTest(validInput);
    expect(result).toEqual(expectedOutput);
  });
  it('should handle edge case', () => {
    // ...
  });
});

jest.mock('@/server/adapters/opensearch/StorageModule', () => ({
  getStorageModule: () => ({
    testCases: {
      create: jest.fn().mockResolvedValue({ id: 'test-1', name: 'Test' }),
      get: jest.fn().mockResolvedValue(null),
    },
  }),
}));

const mockFetch = jest.fn().mockResolvedValue({
  ok: true,
  json: () => Promise.resolve({ data: 'result' }),
});
global.fetch = mockFetch;

afterEach(async () => {
  // Clean up created resources
  await storage.delete(createdId);
});
afterAll(async () => {
  // Close connections
  await server.close();
});

npm test                           # All tests
npm run test:unit                  # Unit only
npm run test:integration           # Integration only
npm test -- path/to/file.test.ts   # Single file
npm test -- --watch                # Watch mode