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

pkg/analyzer/test/file_system/memory_file_system_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.
 
 library analyzer.test.file_system.memory_file_system_test;
 
 import 'dart:async';
 import 'dart:core' hide Resource;
 
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 597 matching lines @@
       provider.newFolder('');
     }, throwsA(new isInstanceOf<ArgumentError>()));
   }
 
   void test_newFolder_notAbsolute() {
     expect(() {
       provider.newFolder('not/absolute');
     }, throwsA(new isInstanceOf<ArgumentError>()));
   }
 
+  test_getModificationTimes() async {
+    File file = provider.newFile('/test.dart', '');
+    Source source = file.createSource();
+    List<int> times = await provider.getModificationTimes([source]);
+    expect(times, [source.modificationStamp]);
+  }
+
   test_watch_createFile() {
     String rootPath = '/my/path';
     provider.newFolder(rootPath);
     return _watchingFolder(rootPath, (changesReceived) {
       expect(changesReceived, hasLength(0));
       String path = posix.join(rootPath, 'foo');
       provider.newFile(path, 'contents');
       return _delayed(() {
         expect(changesReceived, hasLength(1));
         expect(changesReceived[0].type, equals(ChangeType.ADD));
@@ skipping 56 matching lines @@
     return new Future.delayed(Duration.ZERO, computation);
   }
 
   _watchingFolder(String path, test(List<WatchEvent> changesReceived)) {
     Folder folder = provider.getResource(path);
     var changesReceived = <WatchEvent>[];
     folder.changes.listen(changesReceived.add);
     return test(changesReceived);
   }
 }