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'use strict';
// This test starts two clustered HTTP servers on the same port. It expects the
// first cluster to succeed and the second cluster to fail with EADDRINUSE.
//
// The test may seem complex but most of it is plumbing that routes messages
// from the child processes back to the supervisor. As a tree it looks something
// like this:
//
// <supervisor>
// / \
// <master 1> <master 2>
// / \
// <worker 1> <worker 2>
//
// The first worker starts a server on a fixed port and fires a ready message
// that is routed to the second worker. When it tries to bind, it expects to
// see an EADDRINUSE error.
//
// See https://github.com/joyent/node/issues/2721 for more details.
const common = require('../common');
const assert = require('assert');
const cluster = require('cluster');
const fork = require('child_process').fork;
const http = require('http');
const id = process.argv[2];
if (!id) {
const a = fork(__filename, ['one']);
const b = fork(__filename, ['two']);
a.on('exit', common.mustCall((c) => {
if (c) {
b.send('QUIT');
throw new Error('A exited with ' + c);
}
}));
b.on('exit', common.mustCall((c) => {
if (c) {
a.send('QUIT');
throw new Error('B exited with ' + c);
}
}));
a.on('message', common.mustCall((m) => {
if (typeof m === 'object') return;
assert.strictEqual(m, 'READY');
b.send('START');
}));
b.on('message', common.mustCall((m) => {
assert.strictEqual(m, 'EADDRINUSE');
a.send('QUIT');
b.send('QUIT');
}));
} else if (id === 'one') {
if (cluster.isMaster) return startWorker();
http.createServer(common.fail).listen(common.PORT, common.mustCall(() => {
process.send('READY');
}));
process.on('message', common.mustCall((m) => {
if (m === 'QUIT') process.exit();
}));
} else if (id === 'two') {
if (cluster.isMaster) return startWorker();
const server = http.createServer(common.fail);
process.on('message', common.mustCall((m) => {
if (m === 'QUIT') process.exit();
assert.strictEqual(m, 'START');
server.listen(common.PORT, common.fail);
server.on('error', common.mustCall((e) => {
assert.strictEqual(e.code, 'EADDRINUSE');
process.send(e.code);
}));
}, 2));
} else {
assert(0); // bad command line argument
}
function startWorker() {
const worker = cluster.fork();
worker.on('exit', process.exit);
worker.on('message', process.send.bind(process));
process.on('message', worker.send.bind(worker));
}