Normalize paths when matching them.

pkg/watcher/test/utils.dart

 // Copyright (c) 2012, 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.
 
 library watcher.test.utils;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:path/path.dart' as p;
@@ skipping 172 matching lines @@
   /// The expected path.
   final String path;
 
   _ChangeMatcher(this.type, this.path);
 
   Description describe(Description description) {
     description.add("$type $path");
   }
 
   bool matches(item, Map matchState) =>
-      item is WatchEvent && item.type == type && item.path == path;
+      item is WatchEvent &&
+      item.type == type &&
+      p.normalize(item.path) == p.normalize(path);
 }