Use 'Directory.watch' on Windows in pkg/watcher, instead of pooling.

pkg/watcher/test/directory_watcher/windows_test.dart

+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:path/path.dart' as p;
+import 'package:scheduled_test/scheduled_test.dart';
+import 'package:watcher/src/directory_watcher/windows.dart';
+import 'package:watcher/watcher.dart';
+
+import 'shared.dart';
+import '../utils.dart';
+
+main() {
+  initConfig();
+
+  watcherFactory = (dir) => new WindowsDirectoryWatcher(dir);
+
+  setUp(createSandbox);
+
+  sharedTests();
+
+  test('DirectoryWatcher creates a WindowsDirectoryWatcher on Windows', () {
+    expect(new DirectoryWatcher('.'),
+        new isInstanceOf<WindowsDirectoryWatcher>());
+  });
+
+  test('when the watched directory is moved, removes all files', () {

[Bob Nystrom, 2014/06/04 15:48:29]

Huh, I'm surprised we aren't already testing this on all platforms. I see we
have a delete test for this, but not move.

Move this to shared.dart.

[Anders Johnsen, 2014/06/10 06:47:15]

Done.

+    writeFile("dir/a.txt");
+    writeFile("dir/b.txt");
+
+    startWatcher(dir: "dir");
+
+    renameDir("dir", "moved_dir");

[Søren Gjesse, 2014/06/04 10:04:52]

I assume that the sandbox takes care of deleting these files when the test is
done.

[Anders Johnsen, 2014/06/04 10:15:53]

Yes.

+    createDir("dir");
+    inAnyOrder([
+      isRemoveEvent("dir/a.txt"),
+      isRemoveEvent("dir/b.txt")
+    ]);
+  });
+}
+