Function getFreePort

test/node/network-error.js:7–15

(fn)

const express = require('../support/express');

function getFreePort(fn) {
  const server = net.createServer();
  server.listen(0, () => {
    const { port } = server.address();
    server.close(() => {
      fn(port);
    });
  });
}

describe('with network error', () => {
  before(function (done) {