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