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| Current File : //proc/self/root/home/ubuntu/node-v16.18.1/test/parallel/test-dns-lookupService-promises.js |
'use strict';
const common = require('../common');
const assert = require('assert');
const dnsPromises = require('dns').promises;
dnsPromises.lookupService('127.0.0.1', 22).then(common.mustCall((result) => {
assert(['ssh', '22'].includes(result.service));
assert.strictEqual(typeof result.hostname, 'string');
assert.notStrictEqual(result.hostname.length, 0);
}));
// Use an IP from the RFC 5737 test range to cause an error.
// Refs: https://tools.ietf.org/html/rfc5737
assert.rejects(
() => dnsPromises.lookupService('192.0.2.1', 22),
{ code: /^(?:ENOTFOUND|EAI_AGAIN)$/ }
);
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