node/test/parallel/test-dgram-custom-lookup.js

49 lines
1.2 KiB
JavaScript

'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();
}));
}
{
// 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)
});
});
}