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| Current File : //proc/thread-self/root/home/ubuntu/node-v16.18.1/test/parallel/test-dns-channel-cancel-promise.js |
'use strict';
const common = require('../common');
const { promises: dnsPromises } = require('dns');
const assert = require('assert');
const dgram = require('dgram');
const server = dgram.createSocket('udp4');
const resolver = new dnsPromises.Resolver();
const addMessageListener = () => {
server.removeAllListeners('message');
server.once('message', () => {
server.once('message', common.mustNotCall);
resolver.cancel();
});
};
server.bind(0, common.mustCall(async () => {
resolver.setServers([`127.0.0.1:${server.address().port}`]);
addMessageListener();
// Single promise
{
const hostname = 'example0.org';
await assert.rejects(
resolver.resolve4(hostname),
{
code: 'ECANCELLED',
syscall: 'queryA',
hostname
}
);
}
addMessageListener();
// Multiple promises
{
const assertions = [];
const assertionCount = 10;
for (let i = 1; i <= assertionCount; i++) {
const hostname = `example${i}.org`;
assertions.push(
assert.rejects(
resolver.resolve4(hostname),
{
code: 'ECANCELLED',
syscall: 'queryA',
hostname: hostname
}
)
);
}
await Promise.all(assertions);
}
server.close();
}));
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