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'use strict';

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

if (common.isWindows)

common.skip('test not supported on Windows');

const assert = require('assert');

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

const fs = require('fs');

assert.strictEqual(process.listenerCount('SIGUSR2'), 1);

process.kill(process.pid, 'SIGUSR2');

process.kill(process.pid, 'SIGUSR2');

// Asynchronously wait for the snapshot. Use an async loop to be a bit more

// robust in case platform or machine differences throw off the timing.

(function validate() {

const files = fs.readdirSync(process.cwd());

if (files.length === 0)

return setImmediate(validate);

assert.strictEqual(files.length, 2);

for (let i = 0; i < files.length; i++) {

assert.match(files[i], /^Heap\..+\.heapsnapshot$/);

JSON.parse(fs.readFileSync(files[i]));

}

})();

} else {

const { spawnSync } = require('child_process');

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

tmpdir.refresh();

const args = ['--heapsnapshot-signal', 'SIGUSR2', __filename, 'child'];

const child = spawnSync(process.execPath, args, { cwd: tmpdir.path });

assert.strictEqual(child.status, 0);

assert.strictEqual(child.signal, null);

}