Tests for LocalIndex and Dart index contributor.

pkg/analysis_services/test/index/local_file_index_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.services.src.index.local_file_index;
+
+import 'dart:io';
+
+import 'package:analysis_services/index/index.dart';
+import 'package:analysis_services/index/local_file_index.dart';
+import 'package:unittest/unittest.dart';
+
+
+main() {
+  groupSep = ' | ';
+  test('createLocalFileIndex', () {
+    Directory indexDirectory = Directory.systemTemp.createTempSync(
+        'AnalysisServer_index');
+    try {
+    Index index = createLocalFileIndex(indexDirectory);
+    expect(index, isNotNull);
+    } finally {
+      indexDirectory.delete(recursive: true);
+    }
+  });
+}