@primer/react/lib-esm/utils/test-helpers.js

An implementation of GitHub's Primer Design System using React

import { TextEncoder } from 'node:util';

// JSDOM doesn't mock ResizeObserver
global.ResizeObserver = jest.fn().mockImplementation(() => {
  return {
    observe: jest.fn(),
    disconnect: jest.fn(),
    unobserve: jest.fn()
  };
});
global.CSS = {
  escape: jest.fn(),
  supports: jest.fn().mockImplementation(() => {
    return false;
  })
};
global.TextEncoder = TextEncoder;