node/test/simple/test-socket-write-after-fin-error.js

// Copyright Joyent, Inc. and other Node contributors.
//
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//
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var common = require('../common');
var assert = require('assert');

// This is similar to simple/test-socket-write-after-fin, except that
// we don't set allowHalfOpen.  Then we write after the client has sent
// a FIN, and this is an error.  However, the standard "write after end"
// message is too vague, and doesn't actually tell you what happens.

var net = require('net');
var serverData = '';
var gotServerEnd = false;
var clientData = '';
var gotClientEnd = false;
var gotServerError = false;

var server = net.createServer(function(sock) {
  sock.setEncoding('utf8');
  sock.on('error', function(er) {
    console.error(er.code + ': ' + er.message);
    gotServerError = er;
  });

  sock.on('data', function(c) {
    serverData += c;
  });
  sock.on('end', function() {
    gotServerEnd = true
    sock.write(serverData);
    sock.end();
  });
  server.close();
});
server.listen(common.PORT);

var sock = net.connect(common.PORT);
sock.setEncoding('utf8');
sock.on('data', function(c) {
  clientData += c;
});

sock.on('end', function() {
  gotClientEnd = true;
});

process.on('exit', function() {
  assert.equal(clientData, '');
  assert.equal(serverData, 'hello1hello2hello3\nTHUNDERMUSCLE!');
  assert(gotClientEnd);
  assert(gotServerEnd);
  assert(gotServerError);
  assert.equal(gotServerError.code, 'EPIPE');
  assert.notEqual(gotServerError.message, 'write after end');
  console.log('ok');
});

sock.write('hello1');
sock.write('hello2');
sock.write('hello3\n');
sock.end('THUNDERMUSCLE!');