node/test/parallel/test-trace-event-promises.js at 41ae423718cb312c52c7b3bca1988130a2c417f6 · nodejs/node

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'use strict';

const common = require('../common');

const assert = require('assert');

const cp = require('child_process');

const path = require('path');

const fs = require('fs');

const tmpdir = require('../common/tmpdir');

common.disableCrashOnUnhandledRejection();

if (!common.isMainThread)

common.skip('process.chdir is not available in Workers');

if (process.argv[2] === 'child') {

const p = Promise.reject(1); // Handled later

Promise.reject(2); // Unhandled

setImmediate(() => {

p.catch(() => { /* intentional noop */ });

});

} else {

tmpdir.refresh();

process.chdir(tmpdir.path);

const proc = cp.fork(__filename,

[ 'child' ], {

execArgv: [

'--no-warnings',

'--trace-event-categories',

'node.promises.rejections'

]

});

proc.once('exit', common.mustCall(() => {

const file = path.join(tmpdir.path, 'node_trace.1.log');

assert(common.fileExists(file));

fs.readFile(file, common.mustCall((err, data) => {

const traces = JSON.parse(data.toString()).traceEvents

.filter((trace) => trace.cat !== '__metadata');

traces.forEach((trace) => {

assert.strictEqual(trace.pid, proc.pid);

assert.strictEqual(trace.name, 'rejections');

assert(trace.args.unhandled <= 2);

assert(trace.args.handledAfter <= 1);

});

}));

}

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