allinix-demo/next/__mocks__/matchMedia.mock.ts

// When using the matchMedia API in your tests, you will need to mock it.
Object.defineProperty(window, "matchMedia", {
  writable: true,
  value: jest.fn().mockImplementation((query: string) => ({
    matches: false,
    media: query,
    onchange: null,
    addListener: jest.fn(), // Deprecated
    removeListener: jest.fn(), // Deprecated
    addEventListener: jest.fn(),
    removeEventListener: jest.fn(),
    dispatchEvent: jest.fn(),
  })),
});