Extract testing utilities into a separate package.

pkg/analysis_server/test/analysis_hover_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.domain.analysis.hover;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/computer/computer_hover.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/protocol.dart';
+import 'package:analysis_testing/reflective_tests.dart';
 import 'package:unittest/unittest.dart';
 
 import 'analysis_abstract.dart';
-import 'reflective_tests.dart';
 
 
 main() {
   group('notification.hover', () {
     runReflectiveTests(AnalysisHoverTest);
   });
 }
 
 
 @ReflectiveTestCase()
@@ skipping 189 matching lines @@
       expect(hover.containingLibraryPath, testFile);
       expect(hover.dartDoc, isNull);
       expect(hover.elementDescription, 'dynamic vvv');
       expect(hover.elementKind, 'local variable');
       // types
       expect(hover.staticType, 'dynamic');
       expect(hover.propagatedType, 'int');
     });
   }
 }