Testing code that uses node-fetch using Jest

index.js

// Simple module that uses fetch to do a HEAD request
const fetch = require('node-fetch');

module.exports.fn = async (url) => {
  try {
    const response = await fetch(url, { method: "HEAD" });
    return response.ok;
  } catch(err) {
    return false;
  }
};

index.test.js

const { fn } = require("./index.js");

const nock = require("nock");

test('testing nock with node-fetch', async () => {
  const host = "https://www.youtube.com";
  const path = "/";
  nock(host).head(path).reply(200);

  const url = `${host}${path}`;
  const result = await fn(url);
  expect(result).toBe(true);
});