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'use strict';
const common = require('../common');
common.skipIfInspectorDisabled();
common.skipIfWorker(); // https://github.com/nodejs/node/issues/22767
const assert = require('assert');
const { performance } = require('perf_hooks');
const { Session } = require('inspector');
const session = new Session();
function post(message, data) {
return new Promise((resolve, reject) => {
session.post(message, data, (err, result) => {
if (err)
reject(new Error(JSON.stringify(err)));
else
resolve(result);
});
});
}
async function test() {
session.connect();
let traceNotification = null;
let tracingComplete = false;
session.on('NodeTracing.dataCollected', (n) => traceNotification = n);
session.on('NodeTracing.tracingComplete', () => tracingComplete = true);
// Generate a node.perf event before tracing is enabled.
performance.mark('mark1');
const traceConfig = { includedCategories: ['node.perf'] };
await post('NodeTracing.start', { traceConfig });
// Generate a node.perf event after tracing is enabled. This should be the
// mark event captured.
performance.mark('mark2');
await post('NodeTracing.stop', { traceConfig });
performance.mark('mark3');
session.disconnect();
assert.ok(tracingComplete);
assert.ok(traceNotification);
assert.ok(traceNotification.data && traceNotification.data.value);
const events = traceNotification.data.value;
const marks = events.filter((t) => null !== /node\.perf\.usertim/.exec(t.cat));
assert.strictEqual(marks.length, 1);
assert.strictEqual(marks[0].name, 'mark2');
}
test();
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