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'use strict';
var common = require('../common');
var assert = require('assert');
var cluster = require('cluster');
var net = require('net');
if (cluster.isMaster) {
cluster.fork();
cluster.on('listening', common.mustCall(function(worker, address) {
const port = address.port;
// ensure that the port is not 0 or null
assert(port);
// ensure that the port is numerical
assert.strictEqual(typeof port, 'number');
worker.kill();
}));
} else {
net.createServer(common.fail).listen(0);
}
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