'use strict'; const common = require('../common'); const assert = require('assert'); const net = require('net'); const invalidPort = -1 >>> 0; const errorMessage = /"port" argument must be \>= 0 and \< 65536/; net.Server().listen(common.PORT, function() { const address = this.address(); const key = `${address.family.slice(-1)}:${address.address}:${common.PORT}`; assert.equal(this._connectionKey, key); this.close(); }); // The first argument is a configuration object assert.throws(() => { net.Server().listen({ port: invalidPort }, common.fail); }, errorMessage); // The first argument is the port, no IP given. assert.throws(() => { net.Server().listen(invalidPort, common.fail); }, errorMessage); // The first argument is the port, the second an IP. assert.throws(() => { net.Server().listen(invalidPort, '0.0.0.0', common.fail); }, errorMessage);