Failed to jest example code on Readme in Next12.1.6

[mymactive]

Hello!

I've happened to runtime error with the testing readme.

import singletonRouter from 'next/router';
import NextLink from 'next/link';
import { render, fireEvent, screen, waitFor } from '@testing-library/react';

import mockRouter from 'next-router-mock';

jest.mock('next/router', () => require('next-router-mock'));
// This is needed for mocking 'next/link':
jest.mock('next/dist/client/router', () => require('next-router-mock'));

describe('next-router-mock', () => {
  beforeEach(() => {
    mockRouter.setCurrentUrl('/initial');
  });

  it('works with next/link', async () => {
    render(
      <NextLink href="/example?foo=bar">
        <a>Example Link</a>
      </NextLink>
    );
    fireEvent.click(screen.getByText('Example Link'));
    await waitFor(() => {
      expect(singletonRouter).toMatchObject({
        asPath: '/example?foo=bar',
        pathname: '/example',
        query: { foo: 'bar' },
      });
    });
  });
});

The test fails with the following error:

Error: Uncaught [TypeError: Cannot use 'in' operator to search for 'softPush' in null]

This error occurs with fireEvent.click My environment follows:

• next-router-mock: 0.7.4
• Next: 12.1.6
• React: 17.0.2
• Jest: 28.1.3
• jest-environment-jsdom: 28.1.3
• @testing-library/jest-dom: 5.16.4
• @testing-library/react": 12.1.5
• @testing-library/user-event": 14.3.0

[mymactive]

Solve add the following code to jest.setup.js Thanks for issue #58

jest.mock("next/dist/client/router", () => require("next-router-mock"));

jest.mock("next/dist/shared/lib/router-context", () => {
  const { createContext } = require("react");
  const router = require("next-router-mock").default;
  const RouterContext = createContext(router);
  return { RouterContext };
});

This code is quoted from the issue

[scottrippey]

Closing as duplicate of #58 I'm still considering how to fix this.