blakeblackshear.frigate/web/config/setupTests.js

import 'regenerator-runtime/runtime';
import '@testing-library/jest-dom/extend-expect';
import { server } from './server.js';

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

jest.mock('../src/env');

// Establish API mocking before all tests.
beforeAll(() => server.listen());

// Reset any request handlers that we may add during the tests,
// so they don't affect other tests.
afterEach(() => {
  server.resetHandlers();
});

// Clean up after the tests are finished.
afterAll(() => server.close());