node/test/parallel/test-gc-http-client-onerror.js

'use strict';
// Flags: --expose-gc
// just like test-gc-http-client.js,
// but with an on('error') handler that does nothing.

require('../common');
const onGC = require('../common/ongc');

function serverHandler(req, res) {
  req.resume();
  res.writeHead(200, { 'Content-Type': 'text/plain' });
  res.end('Hello World\n');
}

const http = require('http');
const todo = 500;
let done = 0;
let count = 0;
let countGC = 0;

console.log(`We should do ${todo} requests`);

const server = http.createServer(serverHandler);
server.listen(0, runTest);

function getall() {
  if (count >= todo)
    return;

  (function() {
    function cb(res) {
      res.resume();
      done += 1;
    }
    function onerror(er) {
      throw er;
    }

    const req = http.get({
      hostname: 'localhost',
      pathname: '/',
      port: server.address().port
    }, cb).on('error', onerror);

    count++;
    onGC(req, { ongc });
  })();

  setImmediate(getall);
}

function runTest() {
  for (let i = 0; i < 10; i++)
    getall();
}

function ongc() {
  countGC++;
}

setInterval(status, 100).unref();

function status() {
  global.gc();
  console.log('Done: %d/%d', done, todo);
  console.log('Collected: %d/%d', countGC, count);
  if (countGC === todo) server.close();
}