Switch analysis_server to use 'package:test'.

pkg/analysis_server/test/services/refactoring/move_file_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.refactoring.move_files;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/services/refactoring/refactoring.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../../abstract_context.dart';
 import '../../utils.dart';
 import 'abstract_refactoring.dart';
 
 main() {
   initializeTestEnvironment();
-  defineReflectiveTests(MoveFileTest);
+  defineReflectiveSuite(() {
+    defineReflectiveTests(MoveFileTest);
+  });
 }
 
 @reflectiveTest
 class MoveFileTest extends RefactoringTest {
   MoveFileRefactoring refactoring;
 
   test_file_definingUnit() async {
     String pathA = '/project/000/1111/a.dart';
     String pathB = '/project/000/1111/b.dart';
     String pathC = '/project/000/1111/22/c.dart';
@@ skipping 257 matching lines @@
         break;
       }
       for (ChangeNotice notice in result.changeNotices) {
         if (notice.source.fullName.startsWith('/project/')) {
           index.indexUnit(notice.resolvedDartUnit);
         }
       }
     }
   }
 }