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var assert = require('assert');
var cluster = require('cluster');
var net = require('net');
if (cluster.isMaster) {
var port = null;
cluster.fork();
cluster.on('listening', function(worker, address) {
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();
});
process.on('exit', function() {
// ensure that the 'listening' handler has been called
assert(port);
});
}
else {
net.createServer(assert.fail).listen(0);
}
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