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'use strict';
const common = require('../common');
const tmpdir = require('../common/tmpdir');
const assert = require('assert');
const cp = require('child_process');
const fs = require('fs');
const path = require('path');
tmpdir.refresh();
const CODE =
'setTimeout(() => { for (let i = 0; i < 100000; i++) { "test" + i } }, 1)';
const proc = cp.spawn(process.execPath, [
'--trace-events-enabled',
'--trace-event-file-pattern',
// eslint-disable-next-line no-template-curly-in-string
'${pid}-${rotation}-${pid}-${rotation}.tracing.log',
'-e', CODE,
], { cwd: tmpdir.path });
proc.once('exit', common.mustCall(() => {
const expectedFilename = path.join(tmpdir.path,
`${proc.pid}-1-${proc.pid}-1.tracing.log`);
assert(fs.existsSync(expectedFilename));
fs.readFile(expectedFilename, common.mustCall((err, data) => {
const traces = JSON.parse(data.toString()).traceEvents;
assert(traces.length > 0);
}));
}));
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