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// Flags: --expose-internals
'use strict';
const common = require('../common');
const assert = require('assert');
const { internalBinding } = require('internal/test/binding');
const cares = internalBinding('cares_wrap');
// Stub `getaddrinfo` to *always* error. This has to be done before we load the
// `dns` module to guarantee that the `dns` module uses the stub.
cares.getaddrinfo = () => internalBinding('uv').UV_ENOMEM;
const dns = require('dns');
const dnsPromises = dns.promises;
{
const err = {
code: 'ERR_INVALID_ARG_TYPE',
type: TypeError,
message: /^The "hostname" argument must be of type string\. Received type number/
};
common.expectsError(() => dns.lookup(1, {}), err);
common.expectsError(() => dnsPromises.lookup(1, {}), err);
}
// This also verifies different expectWarning notations.
common.expectWarning({
// For 'internal/test/binding' module.
'internal/test/binding': [
'These APIs are for internal testing only. Do not use them.'
],
// For calling `dns.lookup` with falsy `hostname`.
'DeprecationWarning': {
DEP0118: 'The provided hostname "false" is not a valid ' +
'hostname, and is supported in the dns module solely for compatibility.'
}
});
common.expectsError(() => {
dns.lookup(false, 'cb');
}, {
code: 'ERR_INVALID_CALLBACK',
type: TypeError
});
common.expectsError(() => {
dns.lookup(false, 'options', 'cb');
}, {
code: 'ERR_INVALID_CALLBACK',
type: TypeError
});
{
const err = {
code: 'ERR_INVALID_OPT_VALUE',
type: TypeError,
message: 'The value "100" is invalid for option "hints"'
};
const options = {
hints: 100,
family: 0,
all: false
};
common.expectsError(() => { dnsPromises.lookup(false, options); }, err);
common.expectsError(() => {
dns.lookup(false, options, common.mustNotCall());
}, err);
}
{
const err = {
code: 'ERR_INVALID_OPT_VALUE',
type: TypeError,
message: 'The value "20" is invalid for option "family"'
};
const options = {
hints: 0,
family: 20,
all: false
};
common.expectsError(() => { dnsPromises.lookup(false, options); }, err);
common.expectsError(() => {
dns.lookup(false, options, common.mustNotCall());
}, err);
}
(async function() {
let res;
res = await dnsPromises.lookup(false, {
hints: 0,
family: 0,
all: true
});
assert.deepStrictEqual(res, []);
res = await dnsPromises.lookup('127.0.0.1', {
hints: 0,
family: 4,
all: true
});
assert.deepStrictEqual(res, [{ address: '127.0.0.1', family: 4 }]);
res = await dnsPromises.lookup('127.0.0.1', {
hints: 0,
family: 4,
all: false
});
assert.deepStrictEqual(res, { address: '127.0.0.1', family: 4 });
})();
dns.lookup(false, {
hints: 0,
family: 0,
all: true
}, common.mustCall((error, result, addressType) => {
assert.ifError(error);
assert.deepStrictEqual(result, []);
assert.strictEqual(addressType, undefined);
}));
dns.lookup('127.0.0.1', {
hints: 0,
family: 4,
all: true
}, common.mustCall((error, result, addressType) => {
assert.ifError(error);
assert.deepStrictEqual(result, [{
address: '127.0.0.1',
family: 4
}]);
assert.strictEqual(addressType, undefined);
}));
dns.lookup('127.0.0.1', {
hints: 0,
family: 4,
all: false
}, common.mustCall((error, result, addressType) => {
assert.ifError(error);
assert.deepStrictEqual(result, '127.0.0.1');
assert.strictEqual(addressType, 4);
}));
let tickValue = 0;
// Should fail due to stub.
dns.lookup('example.com', common.mustCall((error, result, addressType) => {
assert(error);
assert.strictEqual(tickValue, 1);
assert.strictEqual(error.code, 'ENOMEM');
const descriptor = Object.getOwnPropertyDescriptor(error, 'message');
// The error message should be non-enumerable.
assert.strictEqual(descriptor.enumerable, false);
}));
// Make sure that the error callback is called on next tick.
tickValue = 1;
// Should fail due to stub.
assert.rejects(dnsPromises.lookup('example.com'),
{ code: 'ENOMEM', hostname: 'example.com' });
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