jest.setup.js

import '@testing-library/jest-dom';

jest.mock('next/navigation', () => ({
  useRouter: () => ({
    push: jest.fn(),
    replace: jest.fn(),
    prefetch: jest.fn(),
    back: jest.fn(),
    forward: jest.fn(),
    refresh: jest.fn(),
  }),
  useSearchParams: () => ({
    get: jest.fn(),
    has: jest.fn(),
    forEach: jest.fn(),
  }),
  usePathname: () => '/',
}));

process.env.NEXT_PUBLIC_GA_ID = 'GA-123456';
process.env.NEXT_PUBLIC_API_URL = 'https://api.test.com';
process.env.NEXT_PUBLIC_GOOGLE_SITE_VERIFICATION = 'site-verification-token';

Object.defineProperty(window, 'gtag', {
  value: jest.fn(),
  writable: true,
});

global.IntersectionObserver = class IntersectionObserver {
  constructor() {}
  disconnect() {}
  observe() {}
  unobserve() {}
};

global.ResizeObserver = class ResizeObserver {
  constructor() {}
  disconnect() {}
  observe() {}
  unobserve() {}
};

Object.defineProperty(window, 'matchMedia', {
  writable: true,
  value: jest.fn().mockImplementation(query => ({
    matches: false,
    media: query,
    onchange: null,
    addListener: jest.fn(),
    removeListener: jest.fn(),
    addEventListener: jest.fn(),
    removeEventListener: jest.fn(),
    dispatchEvent: jest.fn(),
  })),
});