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'use strict';
require('../common');
const assert = require('assert');
const dns = require('dns');
const existing = dns.getServers();
assert(existing.length > 0);
// Verify that setServers() handles arrays with holes and other oddities
assert.doesNotThrow(() => {
const servers = [];
servers[0] = '127.0.0.1';
servers[2] = '0.0.0.0';
dns.setServers(servers);
});
assert.doesNotThrow(() => {
const servers = ['127.0.0.1', '192.168.1.1'];
servers[3] = '127.1.0.1';
servers[4] = '127.1.0.1';
servers[5] = '127.1.1.1';
Object.defineProperty(servers, 2, {
enumerable: true,
get: () => {
servers.length = 3;
return '0.0.0.0';
}
});
dns.setServers(servers);
});
function noop() {}
const goog = [
'8.8.8.8',
'8.8.4.4',
];
assert.doesNotThrow(() => dns.setServers(goog));
assert.deepStrictEqual(dns.getServers(), goog);
assert.throws(() => dns.setServers(['foobar']),
/^Error: IP address is not properly formatted: foobar$/);
assert.deepStrictEqual(dns.getServers(), goog);
const goog6 = [
'2001:4860:4860::8888',
'2001:4860:4860::8844',
];
assert.doesNotThrow(() => dns.setServers(goog6));
assert.deepStrictEqual(dns.getServers(), goog6);
goog6.push('4.4.4.4');
dns.setServers(goog6);
assert.deepStrictEqual(dns.getServers(), goog6);
const ports = [
'4.4.4.4:53',
'[2001:4860:4860::8888]:53',
];
const portsExpected = [
'4.4.4.4',
'2001:4860:4860::8888',
];
dns.setServers(ports);
assert.deepStrictEqual(dns.getServers(), portsExpected);
assert.doesNotThrow(() => dns.setServers([]));
assert.deepStrictEqual(dns.getServers(), []);
assert.throws(() => {
dns.resolve('test.com', [], noop);
}, function(err) {
return !(err instanceof TypeError);
}, 'Unexpected error');
// dns.lookup should accept falsey and string values
const errorReg =
/^TypeError: Invalid arguments: hostname must be a string or falsey$/;
assert.throws(() => dns.lookup({}, noop), errorReg);
assert.throws(() => dns.lookup([], noop), errorReg);
assert.throws(() => dns.lookup(true, noop), errorReg);
assert.throws(() => dns.lookup(1, noop), errorReg);
assert.throws(() => dns.lookup(noop, noop), errorReg);
assert.doesNotThrow(() => dns.lookup('', noop));
assert.doesNotThrow(() => dns.lookup(null, noop));
assert.doesNotThrow(() => dns.lookup(undefined, noop));
assert.doesNotThrow(() => dns.lookup(0, noop));
assert.doesNotThrow(() => 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(() => {
dns.lookup('www.google.com', { hints: (dns.V4MAPPED | dns.ADDRCONFIG) + 1 },
noop);
}, /^TypeError: Invalid argument: hints must use valid flags$/);
assert.throws(() => dns.lookup('www.google.com'),
/^TypeError: Invalid arguments: callback must be passed$/);
assert.throws(() => dns.lookup('www.google.com', 4),
/^TypeError: Invalid arguments: callback must be passed$/);
assert.doesNotThrow(() => dns.lookup('www.google.com', 6, noop));
assert.doesNotThrow(() => dns.lookup('www.google.com', {}, noop));
assert.doesNotThrow(() => dns.lookup('', {family: 4, hints: 0}, noop));
assert.doesNotThrow(() => {
dns.lookup('', {
family: 6,
hints: dns.ADDRCONFIG
}, noop);
});
assert.doesNotThrow(() => dns.lookup('', {hints: dns.V4MAPPED}, noop));
assert.doesNotThrow(() => {
dns.lookup('', {
hints: dns.ADDRCONFIG | dns.V4MAPPED
}, noop);
});
assert.throws(() => dns.lookupService('0.0.0.0'),
/^Error: Invalid arguments$/);
assert.throws(() => dns.lookupService('fasdfdsaf', 0, noop),
/^TypeError: "host" argument needs to be a valid IP address$/);
assert.doesNotThrow(() => dns.lookupService('0.0.0.0', '0', noop));
assert.doesNotThrow(() => dns.lookupService('0.0.0.0', 0, noop));
assert.throws(() => dns.lookupService('0.0.0.0', null, noop),
/^TypeError: "port" should be >= 0 and < 65536, got "null"$/);
assert.throws(
() => dns.lookupService('0.0.0.0', undefined, noop),
/^TypeError: "port" should be >= 0 and < 65536, got "undefined"$/
);
assert.throws(() => dns.lookupService('0.0.0.0', 65538, noop),
/^TypeError: "port" should be >= 0 and < 65536, got "65538"$/);
assert.throws(() => dns.lookupService('0.0.0.0', 'test', noop),
/^TypeError: "port" should be >= 0 and < 65536, got "test"$/);
assert.throws(() => dns.lookupService('0.0.0.0', 80, null),
/^TypeError: "callback" argument must be a function$/);
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