Validate cache consistency asynchronously. Compute modification times of physical files in a separa…

pkg/analyzer/test/resource_utils.dart

 // Copyright (c) 2015, 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 analyzer.test.resource_utils;
 
+import 'dart:async';
 import 'dart:core' hide Resource;
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/util/absolute_path.dart';
 import 'package:path/path.dart' as path;
 import 'package:unittest/unittest.dart';
 
 bool get isWindows => path.Style.platform == path.Style.windows;
 
 /**
  * Assert that the given path is posix and absolute.
  */
 void expectAbsolutePosixPath(String posixPath) {
@@ skipping 76 matching lines @@
   @override
   path.Context get pathContext => _provider.pathContext;
 
   @override
   File getFile(String path) => _provider.getFile(_assertPath(path));
 
   @override
   Folder getFolder(String path) => _provider.getFolder(_assertPath(path));
 
   @override
+  Future<List<int>> getModificationTimes(List<Source> sources) async {
+    return sources.map((source) => 0).toList();
+  }
+
+  @override
   Resource getResource(String path) => _provider.getResource(_assertPath(path));
 
   @override
   Folder getStateLocation(String pluginId) =>
       _provider.getStateLocation(pluginId);
 
   /**
    * Assert that the given path is valid for the OS platform on which the
    * tests are running.
    */
   String _assertPath(String path) {
     if (isWindows) {
       if (path.contains('/')) {
         fail('Expected windows path, but found: $path');
       }
     } else {
       if (path.contains('\\')) {
         fail('Expected posix path, but found: $path');
       }
     }
     return path;
   }
 }