Make ContextDirectoryManager responsible for scanning directory contents.

pkg/analysis_server/test/context_directory_manager_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 test.context.directory.manager;
 
 import 'package:analysis_server/src/context_directory_manager.dart';
 import 'package:analysis_server/src/resource.dart';
+import 'package:path/path.dart';
 import 'package:unittest/unittest.dart';
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/source.dart';
 
 class TestContextDirectoryManager extends ContextDirectoryManager {
   TestContextDirectoryManager(MemoryResourceProvider provider) : super(provider);
 
   final Set<String> currentContextPaths = new Set<String>();
+  final Map<String, String> currentContextPubspecPaths = <String, String>{};
+  final Map<String, Set<String>> currentContextFilePaths = <String, Set<String>>{};
 
   @override
-  void addContext(Folder folder) {
+  void addContext(Folder folder, File pubspecFile) {
     currentContextPaths.add(folder.fullName);
+    currentContextPubspecPaths[folder.fullName] = pubspecFile != null ? pubspecFile.fullName : null;
+    currentContextFilePaths[folder.fullName] = new Set<String>();
+  }
+
+  @override
+  void applyChangesToContext(Folder contextFolder, ChangeSet changeSet) {
+    Set<String> filePaths = currentContextFilePaths[contextFolder.fullName];
+    for (Source source in changeSet.addedSources) {
+      filePaths.add(source.fullName);
+    }
+    // TODO(paulberry): handle source.changedSources and source.removedSources.
   }
 }
 
 main() {
   groupSep = ' | ';
 
   group('ContextDirectoryManager', () {
     TestContextDirectoryManager manager;
     MemoryResourceProvider provider;
 
     setUp(() {
       provider = new MemoryResourceProvider();
       manager = new TestContextDirectoryManager(provider);
     });
 
     test('add folder with pubspec', () {
-      provider.newFile('/my/proj/pubspec.yaml', 'pubspec');
-      manager.setRoots(<String>['/my/proj'], <String>[]);
+      String projPath = '/my/proj';
+      String pubspecPath = posix.join(projPath, 'pubspec.yaml');
+      provider.newFolder(projPath);
+      provider.newFile(pubspecPath, 'pubspec');
+      manager.setRoots(<String>[projPath], <String>[]);
       expect(manager.currentContextPaths, hasLength(1));
-      expect(manager.currentContextPaths, contains('/my/proj'));
+      expect(manager.currentContextPaths, contains(projPath));
+      expect(manager.currentContextPubspecPaths[projPath], equals(pubspecPath));
+      expect(manager.currentContextFilePaths[projPath], hasLength(0));
+    });
+
+    test('add folder without pubspec', () {
+      String projPath = '/my/proj';
+      provider.newFolder(projPath);
+      manager.setRoots(<String>[projPath], <String>[]);
+      expect(manager.currentContextPaths, hasLength(1));
+      expect(manager.currentContextPaths, contains(projPath));
+      expect(manager.currentContextPubspecPaths[projPath], isNull);
+      expect(manager.currentContextFilePaths[projPath], hasLength(0));
+    });
+
+    test('add folder with dart file', () {
+      String projPath = '/my/proj';
+      provider.newFolder(projPath);
+      String filePath = posix.join(projPath, 'foo.dart');
+      provider.newFile(filePath, 'contents');
+      manager.setRoots(<String>[projPath], <String>[]);
+      var filePaths = manager.currentContextFilePaths[projPath];
+      expect(filePaths, hasLength(1));
+      expect(filePaths, contains(filePath));
+    });
+
+    test('add folder with dart file in subdir', () {
+      String projPath = '/my/proj';
+      provider.newFolder(projPath);
+      String filePath = posix.join(projPath, 'foo', 'bar.dart');
+      provider.newFile(filePath, 'contents');
+      manager.setRoots(<String>[projPath], <String>[]);
+      var filePaths = manager.currentContextFilePaths[projPath];
+      expect(filePaths, hasLength(1));
+      expect(filePaths, contains(filePath));
     });
   });
 }