1'use strict';
2const common = require('../common');
3const tmpdir = require('../common/tmpdir');
4const assert = require('assert');
5const cp = require('child_process');
6const fs = require('fs');
7const path = require('path');
8
9tmpdir.refresh();
10
11const CODE =
12  'setTimeout(() => { for (let i = 0; i < 100000; i++) { "test" + i } }, 1)';
13
14const proc = cp.spawn(process.execPath, [
15  '--trace-events-enabled',
16  '--trace-event-file-pattern',
17  // eslint-disable-next-line no-template-curly-in-string
18  '${pid}-${rotation}-${pid}-${rotation}.tracing.log',
19  '-e', CODE,
20], { cwd: tmpdir.path });
21
22proc.once('exit', common.mustCall(() => {
23  const expectedFilename = path.join(tmpdir.path,
24                                     `${proc.pid}-1-${proc.pid}-1.tracing.log`);
25
26  assert(fs.existsSync(expectedFilename));
27  fs.readFile(expectedFilename, common.mustCall((err, data) => {
28    const traces = JSON.parse(data.toString()).traceEvents;
29    assert(traces.length > 0);
30  }));
31}));
32