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denoland-deno/tests/node_compat/test/parallel/test-dgram-custom-lookup.js

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// deno-fmt-ignore-file
// deno-lint-ignore-file
// Copyright Joyent and Node contributors. All rights reserved. MIT license.
// Taken from Node 16.13.0
// This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually
'use strict';
const common = require('../common');
const assert = require('assert');
const dgram = require('dgram');
const dns = require('dns');
{
// Verify that the provided lookup function is called.
const lookup = common.mustCall((host, family, callback) => {
dns.lookup(host, family, callback);
});
const socket = dgram.createSocket({ type: 'udp4', lookup });
socket.bind(common.mustCall(() => {
socket.close();
}));
}
// TODO: unable to overwrite imports with spies
// {
// // Verify that lookup defaults to dns.lookup().
// const originalLookup = dns.lookup;
// dns.lookup = common.mustCall((host, family, callback) => {
// dns.lookup = originalLookup;
// originalLookup(host, family, callback);
// });
// const socket = dgram.createSocket({ type: 'udp4' });
// socket.bind(common.mustCall(() => {
// socket.close();
// }));
// }
{
// Verify that non-functions throw.
[null, true, false, 0, 1, NaN, '', 'foo', {}, Symbol()].forEach((value) => {
assert.throws(() => {
dgram.createSocket({ type: 'udp4', lookup: value });
}, {
code: 'ERR_INVALID_ARG_TYPE',
name: 'TypeError',
message: 'The "lookup" argument must be of type function.' +
common.invalidArgTypeHelper(value)
});
});
}