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'use strict';
const common = require('../common');
const assert = require('assert');
const cp = require('child_process');
const path = require('path');
const tmpdir = require('../common/tmpdir');
const fs = require('fs');
const util = require('util');
if (!common.isMainThread)
common.skip('process.chdir is not available in Workers');
const traceFile = 'node_trace.1.log';
tmpdir.refresh();
process.chdir(tmpdir.path);
const test_str = 'const dns = require("dns");' +
'const options = {' +
' family: 4,' +
' hints: dns.ADDRCONFIG | dns.V4MAPPED,' +
'};';
const tests = {
'lookup': 'dns.lookup("example.com", options, (err, address, family) => {});',
'lookupService': 'dns.lookupService("127.0.0.1", 22, ' +
'(err, hostname, service) => {});',
'reverse': 'dns.reverse("8.8.8.8", (err, hostnames) => {});',
'resolveAny': 'dns.resolveAny("example.com", (err, res) => {});',
'resolve4': 'dns.resolve4("example.com", (err, res) => {});',
'resolve6': 'dns.resolve6("example.com", (err, res) => {});',
'resolveCname': 'dns.resolveCname("example.com", (err, res) => {});',
'resolveMx': 'dns.resolveMx("example.com", (err, res) => {});',
'resolveNs': 'dns.resolveNs("example.com", (err, res) => {});',
'resolveTxt': 'dns.resolveTxt("example.com", (err, res) => {});',
'resolveSrv': 'dns.resolveSrv("example.com", (err, res) => {});',
'resolvePtr': 'dns.resolvePtr("example.com", (err, res) => {});',
'resolveNaptr': 'dns.resolveNaptr("example.com", (err, res) => {});',
'resolveSoa': 'dns.resolveSoa("example.com", (err, res) => {});'
};
for (const tr in tests) {
const proc = cp.spawnSync(process.execPath,
[ '--trace-event-categories',
'node.dns.native',
'-e',
test_str + tests[tr]
],
{ encoding: 'utf8' });
// Make sure the operation is successful.
// Don't use assert with a custom message here. Otherwise the
// inspection in the message is done eagerly and wastes a lot of CPU
// time.
if (proc.status !== 0) {
throw new Error(`${tr}:\n${util.inspect(proc)}`);
}
const file = path.join(tmpdir.path, traceFile);
const data = fs.readFileSync(file);
const traces = JSON.parse(data.toString()).traceEvents
.filter((trace) => trace.cat !== '__metadata');
assert(traces.length > 0);
// DNS native trace events should be generated.
assert(traces.some((trace) => {
return (trace.name === tr && trace.pid === proc.pid);
}));
}