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'use strict';
const common = require('../common');
const assert = require('assert');
const cluster = require('cluster');
const net = require('net');
if (cluster.isWorker) {
net.createServer((socket) => {
socket.end('echo');
}).listen(common.PORT, '127.0.0.1');
net.createServer((socket) => {
socket.end('echo');
}).listen(common.PORT + 1, '127.0.0.1');
} else if (cluster.isMaster) {
const servers = 2;
// test a single TCP server
const testConnection = function(port, cb) {
const socket = net.connect(port, '127.0.0.1', () => {
// buffer result
let result = '';
socket.on('data', common.mustCall((chunk) => { result += chunk; }));
// check result
socket.on('end', common.mustCall(() => {
cb(result === 'echo');
}));
});
};
// test both servers created in the cluster
const testCluster = function(cb) {
let done = 0;
for (let i = 0, l = servers; i < l; i++) {
testConnection(common.PORT + i, (success) => {
assert.ok(success);
done += 1;
if (done === servers) {
cb();
}
});
}
};
// start two workers and execute callback when both is listening
const startCluster = function(cb) {
const workers = 8;
let online = 0;
for (let i = 0, l = workers; i < l; i++) {
cluster.fork().on('listening', common.mustCall(() => {
online += 1;
if (online === workers * servers) {
cb();
}
}, servers));
}
};
const results = {
start: 0,
test: 0,
disconnect: 0
};
const test = function(again) {
//1. start cluster
startCluster(() => {
results.start += 1;
//2. test cluster
testCluster(() => {
results.test += 1;
//3. disconnect cluster
cluster.disconnect(() => {
results.disconnect += 1;
// run test again to confirm cleanup
if (again) {
test();
}
});
});
});
};
test(true);
process.once('exit', () => {
assert.strictEqual(results.start, 2);
assert.strictEqual(results.test, 2);
assert.strictEqual(results.disconnect, 2);
});
}
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