test: enhance fs-watch-recursive test

This patch

  - issues a TAP plugin parsable message on non darwin/windows boxes
  - uses `const` wherever applicable
  - moves the test to parallel

PR-URL: #2599
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-fs-watch-recursive.js

@@ -0,0 +1,43 @@
+'use strict';
+
+const common = require('../common');
+
+if (!(process.platform === 'darwin' || common.isWindows)) {
+  console.log('1..0 # Skipped: recursive option is darwin/windows specific');
+  return;
+}
+
+const assert = require('assert');
+const path = require('path');
+const fs = require('fs');
+
+const testDir = common.tmpDir;
+const filenameOne = 'watch.txt';
+const testsubdirName = 'testsubdir';
+const testsubdir = path.join(testDir, testsubdirName);
+const relativePathOne = path.join('testsubdir', filenameOne);
+const filepathOne = path.join(testsubdir, filenameOne);
+
+common.refreshTmpDir();
+
+fs.mkdirSync(testsubdir, 0o700);
+
+const watcher = fs.watch(testDir, {recursive: true});
+
+var watcherClosed = false;
+watcher.on('change', function(event, filename) {
+  assert.ok('change' === event || 'rename' === event);
+
+  // Ignore stale events generated by mkdir and other tests
+  if (filename !== relativePathOne)
+    return;
+
+  watcher.close();
+  watcherClosed = true;
+});
+
+fs.writeFileSync(filepathOne, 'world');
+
+process.on('exit', function() {
+  assert(watcherClosed, 'watcher Object was not closed');
+});