node/test/parallel/test-http-socket-listeners.js

'use strict';

const common = require('../common');
const assert = require('assert');
const http = require('http');
const net = require('net');

// This test sends an invalid character to a HTTP server and purposely
// does not handle clientError (even if it sets an event handler).
//
// The idea is to let the server emit multiple errors on the socket,
// mostly due to parsing error, and make sure they don't result
// in leaking event listeners.

let i = 0;
let socket;

process.on('warning', common.mustNotCall());

const server = http.createServer(common.mustNotCall());

server.on('clientError', common.mustCallAtLeast((err) => {
  assert.strictEqual(err.code, 'HPE_INVALID_METHOD');
  assert.strictEqual(err.rawPacket.toString(), '*');

  if (i === 20) {
    socket.end();
  } else {
    socket.write('*');
    i++;
  }
}, 1));

server.listen(0, () => {
  socket = net.createConnection({ port: server.address().port });

  socket.on('connect', () => {
    socket.write('*');
  });

  socket.on('close', () => {
    server.close();
  });
});