mockingjar/jest.setup.js at main · firstpersoncode/mockingjar · GitHub

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import '@testing-library/jest-dom'

// Mock IntersectionObserver
global.IntersectionObserver = class IntersectionObserver {
  constructor() {}
  observe() {
    return null;
  }
  disconnect() {
    return null;
  }
  unobserve() {
    return null;
  }
};

// Mock ResizeObserver
global.ResizeObserver = class ResizeObserver {
  constructor() {}
  observe() {
    return null;
  }
  disconnect() {
    return null;
  }
  unobserve() {
    return null;
  }
};

// Mock clipboard API
Object.assign(navigator, {
  clipboard: {
    writeText: jest.fn().mockResolvedValue(undefined),
  },
});

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