xref: /third_party/node/test/parallel/test-net-dns-lookup.js

// Copyright Joyent, Inc. and other Node contributors.
//
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// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
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// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
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'use strict';
const common = require('../common');
const assert = require('assert');
const net = require('net');

const server = net.createServer(function(client) {
  client.end();
  server.close();
});

server.listen(0, common.mustCall(function() {
  net.connect(this.address().port, 'localhost')
    .on('lookup', common.mustCallAtLeast(function(err, ip, type, host) {
      assert.strictEqual(err, null);
      assert.match(ip, /^(127\.0\.0\.1|::1)$/);
      assert.match(type.toString(), /^(4|6)$/);
      assert.strictEqual(host, 'localhost');
    }, 1));
}));