test-fs-watch-recursive-assert-leaks.js

'use strict';

const common = require('../common');
const { setTimeout } = require('timers/promises');

if (common.isIBMi)
  common.skip('IBMi does not support `fs.watch()`');

// fs-watch on folders have limited capability in AIX.
// The testcase makes use of folder watching, and causes
// hang. This behavior is documented. Skip this for AIX.

if (common.isAIX)
  common.skip('folder watch capability is limited in AIX.');

const assert = require('assert');
const path = require('path');
const fs = require('fs');

const tmpdir = require('../common/tmpdir');
const testDir = tmpdir.path;
tmpdir.refresh();

(async () => {
  // Assert recursive watch does not leak handles
  const rootDirectory = fs.mkdtempSync(testDir + path.sep);
  const testDirectory = path.join(rootDirectory, 'test-7');
  const filePath = path.join(testDirectory, 'only-file.txt');
  fs.mkdirSync(testDirectory);

  let watcherClosed = false;
  const watcher = fs.watch(testDirectory, { recursive: true });
  watcher.on('change', common.mustCallAtLeast(async (event, filename) => {
    await setTimeout(common.platformTimeout(100));
    if (filename === path.basename(filePath)) {
      watcher.close();
      watcherClosed = true;
    }
    await setTimeout(common.platformTimeout(100));
    assert(!process._getActiveHandles().some((handle) => handle.constructor.name === 'StatWatcher'));
  }));

  process.on('exit', function() {
    assert(watcherClosed, 'watcher Object was not closed');
  });
  await setTimeout(common.platformTimeout(100));
  fs.writeFileSync(filePath, 'content');
})().then(common.mustCall());

(async () => {
  // Handle non-boolean values for options.recursive

  if (!common.isWindows && !common.isOSX) {
    assert.throws(() => {
      const testsubdir = fs.mkdtempSync(testDir + path.sep);
      fs.watch(testsubdir, { recursive: '1' });
    }, {
      code: 'ERR_INVALID_ARG_TYPE',
    });
  }
})().then(common.mustCall());