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20 lines
587 B
JavaScript
20 lines
587 B
JavaScript
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'use strict';
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const common = require('../common');
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const assert = require('assert');
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const dnsPromises = require('dns').promises;
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dnsPromises.lookupService('127.0.0.1', 22).then(common.mustCall((result) => {
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assert.strictEqual(result.service, 'ssh');
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assert.strictEqual(typeof result.hostname, 'string');
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assert.notStrictEqual(result.hostname.length, 0);
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}));
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// Use an IP from the RFC 5737 test range to cause an error.
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// Refs: https://tools.ietf.org/html/rfc5737
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assert.rejects(
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() => dnsPromises.lookupService('192.0.2.1', 22),
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{ code: /^(?:ENOTFOUND|EAI_AGAIN)$/ }
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);
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