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'use strict';
const common = require('../common');
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) => {
common.expectsError(() => {
dgram.createSocket({ type: 'udp4', lookup: value });
}, {
code: 'ERR_INVALID_ARG_TYPE',
type: TypeError,
message: 'The "lookup" argument must be of type Function. ' +
`Received type ${typeof value}`
});
});
}