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test: improve test coverage of dns/promises #41133

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merged 2 commits into from Dec 19, 2021
Merged

test: improve test coverage of dns/promises #41133

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test: improve test coverage of dns/promises
kuriyosh Dec 10, 2021
53771fb
test: fix dns/promise import & hints type error
kuriyosh Dec 11, 2021
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32 changes: 32 additions & 0 deletions test/parallel/test-dns-lookup-promises-options-deprecated.js
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@@ -0,0 +1,32 @@
// Flags: --expose-internals
'use strict';
const common = require('../common');
const assert = require('assert');
const { internalBinding } = require('internal/test/binding');
const cares = internalBinding('cares_wrap');
cares.getaddrinfo = () => internalBinding('uv').UV_ENOMEM;

// This test ensures that dns.lookup issue a DeprecationWarning
// when invalid options type is given

const dnsPromises = require('dns/promises');

common.expectWarning({
'internal/test/binding': [
'These APIs are for internal testing only. Do not use them.',
],
'DeprecationWarning': {
DEP0153: 'Type coercion of dns.lookup options is deprecated'
}
});

assert.throws(() => {
dnsPromises.lookup('127.0.0.1', { hints: '-1' });
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This test only check whether DeprecationWarning is emitted when hints is not a number.
Since the valid string value of hints depends on the OS environment, give an invalid string value here and assert the error.

}, {
code: 'ERR_INVALID_ARG_VALUE',
name: 'TypeError'
});
dnsPromises.lookup('127.0.0.1', { family: '6' });
dnsPromises.lookup('127.0.0.1', { all: 'true' });
dnsPromises.lookup('127.0.0.1', { verbatim: 'true' });
dnsPromises.lookup('127.0.0.1', '6');