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

pkg/analyzer/test/file_system/physical_resource_provider_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.physical_resource_provider_test;
 
 import 'dart:async';
 import 'dart:core' hide Resource;
 import 'dart:io' as io;
 
@@ skipping 359 matching lines @@
       }
       expect(grandParent, new isInstanceOf<Folder>());
       expect(grandParent.path.length, lessThan(parent.path.length));
       parent = grandParent;
     }
   }
 }
 
 @reflectiveTest
 class PhysicalResourceProviderTest extends _BaseTest {
+  test_getModificationTimes() async {
+    PhysicalResourceProvider provider = PhysicalResourceProvider.INSTANCE;
+    String path = join(tempPath, 'file1.txt');
+    new io.File(path).writeAsStringSync('');
+    Source source = provider.getFile(path).createSource();
+    List<int> times = await provider.getModificationTimes([source]);
+    expect(times, [source.modificationStamp]);
+  }
+
   void test_getStateLocation_uniqueness() {
     PhysicalResourceProvider provider = PhysicalResourceProvider.INSTANCE;
     String idOne = 'one';
     Folder folderOne = provider.getStateLocation(idOne);
     expect(folderOne, isNotNull);
     String idTwo = 'two';
     Folder folderTwo = provider.getStateLocation(idTwo);
     expect(folderTwo, isNotNull);
     expect(folderTwo, isNot(equals(folderOne)));
     expect(provider.getStateLocation(idOne), equals(folderOne));
@@ skipping 154 matching lines @@
 
   setUp() {
     tempDirectory = io.Directory.systemTemp.createTempSync('test_resource');
     tempPath = tempDirectory.absolute.path;
   }
 
   tearDown() {
     tempDirectory.deleteSync(recursive: true);
   }
 }