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'use strict';
require('../common');
const assert = require('assert');
const fork = require('child_process').fork;
const net = require('net');
// progress tracker
function ProgressTracker(missing, callback) {
this.missing = missing;
this.callback = callback;
}
ProgressTracker.prototype.done = function() {
this.missing -= 1;
this.check();
};
ProgressTracker.prototype.check = function() {
if (this.missing === 0) this.callback();
};
if (process.argv[2] === 'child') {
let serverScope;
process.on('message', function onServer(msg, server) {
if (msg.what !== 'server') return;
process.removeListener('message', onServer);
serverScope = server;
server.on('connection', function(socket) {
console.log('CHILD: got connection');
process.send({what: 'connection'});
socket.destroy();
});
// start making connection from parent
console.log('CHILD: server listening');
process.send({what: 'listening'});
});
process.on('message', function onClose(msg) {
if (msg.what !== 'close') return;
process.removeListener('message', onClose);
serverScope.on('close', function() {
process.send({what: 'close'});
});
serverScope.close();
});
process.on('message', function onSocket(msg, socket) {
if (msg.what !== 'socket') return;
process.removeListener('message', onSocket);
socket.end('echo');
console.log('CHILD: got socket');
});
process.send({what: 'ready'});
} else {
const child = fork(process.argv[1], ['child']);
child.on('exit', function() {
console.log('CHILD: died');
});
// send net.Server to child and test by connecting
const testServer = function(callback) {
// destroy server execute callback when done
const progress = new ProgressTracker(2, function() {
server.on('close', function() {
console.log('PARENT: server closed');
child.send({what: 'close'});
});
server.close();
});
// we expect 4 connections and close events
const connections = new ProgressTracker(4, progress.done.bind(progress));
const closed = new ProgressTracker(4, progress.done.bind(progress));
// create server and send it to child
let server = net.createServer();
server.on('connection', function(socket) {
console.log('PARENT: got connection');
socket.destroy();
connections.done();
});
server.on('listening', function() {
console.log('PARENT: server listening');
child.send({what: 'server'}, server);
});
server.listen(0);
// handle client messages
const messageHandlers = function(msg) {
if (msg.what === 'listening') {
// make connections
let socket;
for (let i = 0; i < 4; i++) {
socket = net.connect(server.address().port, function() {
console.log('CLIENT: connected');
});
socket.on('close', function() {
closed.done();
console.log('CLIENT: closed');
});
}
} else if (msg.what === 'connection') {
// child got connection
connections.done();
} else if (msg.what === 'close') {
child.removeListener('message', messageHandlers);
callback();
}
};
child.on('message', messageHandlers);
};
// send net.Socket to child
const testSocket = function(callback) {
// create a new server and connect to it,
// but the socket will be handled by the child
const server = net.createServer();
server.on('connection', function(socket) {
socket.on('close', function() {
console.log('CLIENT: socket closed');
});
child.send({what: 'socket'}, socket);
});
server.on('close', function() {
console.log('PARENT: server closed');
callback();
});
// don't listen on the same port, because SmartOS sometimes says
// that the server's fd is closed, but it still cannot listen
// on the same port again.
//
// An isolated test for this would be lovely, but for now, this
// will have to do.
server.listen(0, function() {
console.error('testSocket, listening');
const connect = net.connect(server.address().port);
let store = '';
connect.on('data', function(chunk) {
store += chunk;
console.log('CLIENT: got data');
});
connect.on('close', function() {
console.log('CLIENT: closed');
assert.equal(store, 'echo');
server.close();
});
});
};
// create server and send it to child
let serverSuccess = false;
let socketSuccess = false;
child.on('message', function onReady(msg) {
if (msg.what !== 'ready') return;
child.removeListener('message', onReady);
testServer(function() {
serverSuccess = true;
testSocket(function() {
socketSuccess = true;
child.kill();
});
});
});
process.on('exit', function() {
assert.ok(serverSuccess);
assert.ok(socketSuccess);
});
}
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