btc-tooling/jest.setup.js at main · douvy/btc-tooling · GitHub

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// Learn more: https://github.com/testing-library/jest-dom
import '@testing-library/jest-dom';

// Mock window.matchMedia for responsive design tests
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(),
  })),
});

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

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