'use strict'; require('../common'); var assert = require('assert'); var dns = require('dns'); var existing = dns.getServers(); assert(existing.length); function noop() {} var goog = [ '8.8.8.8', '8.8.4.4', ]; assert.doesNotThrow(function() { dns.setServers(goog); }); assert.deepEqual(dns.getServers(), goog); assert.throws(function() { dns.setServers(['foobar']); }); assert.deepEqual(dns.getServers(), goog); var goog6 = [ '2001:4860:4860::8888', '2001:4860:4860::8844', ]; assert.doesNotThrow(function() { dns.setServers(goog6); }); assert.deepEqual(dns.getServers(), goog6); goog6.push('4.4.4.4'); dns.setServers(goog6); assert.deepEqual(dns.getServers(), goog6); var ports = [ '4.4.4.4:53', '[2001:4860:4860::8888]:53', ]; var portsExpected = [ '4.4.4.4', '2001:4860:4860::8888', ]; dns.setServers(ports); assert.deepEqual(dns.getServers(), portsExpected); assert.doesNotThrow(function() { dns.setServers([]); }); assert.deepEqual(dns.getServers(), []); assert.throws(function() { dns.resolve('test.com', [], noop); }, function(err) { return !(err instanceof TypeError); }, 'Unexpected error'); // dns.lookup should accept falsey and string values assert.throws(function() { dns.lookup({}, noop); }, 'invalid arguments: hostname must be a string or falsey'); assert.throws(function() { dns.lookup([], noop); }, 'invalid arguments: hostname must be a string or falsey'); assert.throws(function() { dns.lookup(true, noop); }, 'invalid arguments: hostname must be a string or falsey'); assert.throws(function() { dns.lookup(1, noop); }, 'invalid arguments: hostname must be a string or falsey'); assert.throws(function() { dns.lookup(noop, noop); }, 'invalid arguments: hostname must be a string or falsey'); assert.doesNotThrow(function() { dns.lookup('', noop); }); assert.doesNotThrow(function() { dns.lookup(null, noop); }); assert.doesNotThrow(function() { dns.lookup(undefined, noop); }); assert.doesNotThrow(function() { dns.lookup(0, noop); }); assert.doesNotThrow(function() { dns.lookup(NaN, noop); }); /* * Make sure that dns.lookup throws if hints does not represent a valid flag. * (dns.V4MAPPED | dns.ADDRCONFIG) + 1 is invalid because: * - it's different from dns.V4MAPPED and dns.ADDRCONFIG. * - it's different from them bitwise ored. * - it's different from 0. * - it's an odd number different than 1, and thus is invalid, because * flags are either === 1 or even. */ assert.throws(function() { dns.lookup('www.google.com', { hints: (dns.V4MAPPED | dns.ADDRCONFIG) + 1 }, noop); }); assert.throws(function() { dns.lookup('www.google.com'); }, 'invalid arguments: callback must be passed'); assert.throws(function() { dns.lookup('www.google.com', 4); }, 'invalid arguments: callback must be passed'); assert.doesNotThrow(function() { dns.lookup('www.google.com', 6, noop); }); assert.doesNotThrow(function() { dns.lookup('www.google.com', {}, noop); }); assert.doesNotThrow(function() { dns.lookup('www.google.com', { family: 4, hints: 0 }, noop); }); assert.doesNotThrow(function() { dns.lookup('www.google.com', { family: 6, hints: dns.ADDRCONFIG }, noop); }); assert.doesNotThrow(function() { dns.lookup('www.google.com', { hints: dns.V4MAPPED }, noop); }); assert.doesNotThrow(function() { dns.lookup('www.google.com', { hints: dns.ADDRCONFIG | dns.V4MAPPED }, noop); });