Add unit tests for copy/paste support

pkg/analysis_server/test/src/test_all.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.
 
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
+import 'computer/test_all.dart' as computer_all;
 import 'domain_abstract_test.dart' as domain_abstract_test;
 import 'plugin/test_all.dart' as plugin_all;
+import 'utilities/test_all.dart' as utilities_all;
+import 'watch_manager_test.dart' as watch_manager_test;
 
 /**
  * Utility for manually running all tests.
  */
 main() {
   defineReflectiveSuite(() {
+    computer_all.main();
     domain_abstract_test.main();
     plugin_all.main();
+    utilities_all.main();
+    watch_manager_test.main();
   }, name: 'src');
 }