copenhagen_theme/jest.setup.js at master · zendesk/copenhagen_theme · GitHub

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import { jest } from "@jest/globals";

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(),
  })),
});

if (typeof window.matchMedia !== "function") {
  window.matchMedia = 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(),
  }));
}

// Mock for document.dir which is used in createTheme
Object.defineProperty(document, "dir", {
  writable: true,
  value: "ltr",
});