Home.spec.js

import mockNanoId from '__mocks__/mockNanoId';
import { render } from '@testing-library/react';
import Home from './Home';

describe('Home | component | integration test', () => {
  beforeEach(mockNanoId);
  
  it('renders the home page', () => {
    const { container } = render(<Home />);
    
    expect(container.firstChild).toMatchSnapshot();
  });
});

mockNanoId.js

import { nanoid } from 'nanoid';

jest.mock('nanoid', () => ({
  nanoid: jest.fn(() => '0'),
}));

function mockNanoId() {
  let count = 0;

  /** @type {jest.Mock} */
  (nanoid).mockReset().mockImplementation(() => {
    count += 1;
    return count.toString(10);
  });
}

export default mockNanoId;