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'use strict';
const common = require('../common');
const assert = require('assert');
const cp = require('child_process');
const fs = require('fs');
const CODE = 'for (var i = 0; i < 100000; i++) { "test" + i }';
const FILE_NAME = 'node_trace.1.log';
common.refreshTmpDir();
process.chdir(common.tmpDir);
const proc_no_categories = cp.spawn(
process.execPath,
[ '--trace-events-enabled', '--trace-event-categories', '""', '-e', CODE ]
);
proc_no_categories.once('exit', common.mustCall(() => {
assert(!common.fileExists(FILE_NAME));
const proc = cp.spawn(process.execPath,
[ '--trace-events-enabled', '-e', CODE ]);
proc.once('exit', common.mustCall(() => {
assert(common.fileExists(FILE_NAME));
fs.readFile(FILE_NAME, common.mustCall((err, data) => {
const traces = JSON.parse(data.toString()).traceEvents;
assert(traces.length > 0);
// Values that should be present on all runs to approximate correctness.
assert(traces.some((trace) => {
if (trace.pid !== proc.pid)
return false;
if (trace.cat !== 'v8')
return false;
if (trace.name !== 'V8.ScriptCompiler')
return false;
return true;
}));
}));
}));
}));