Reset refactoring manager on any analysis.

pkg/analysis_server/test/analysis_abstract.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.abstract;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/domain_analysis.dart';
@@ skipping 66 matching lines @@
     resourceProvider.newFile(path, content);
     return path;
   }
 
   String addTestFile(String content) {
     addFile(testFile, content);
     this.testCode = content;
     return testFile;
   }
 
+  String modifyTestFile(String content) {
+    addFile(testFile, content);
+    this.testCode = content;
+    return testFile;
+  }
+
   Index createIndex() {
     return null;
   }
 
   /**
    * Creates a project `/project`.
    */
   void createProject() {
     resourceProvider.newFolder(projectPath);
     Request request = new AnalysisSetAnalysisRootsParams([projectPath],
@@ skipping 153 matching lines @@
     return waitForServerOperationsPerformed(server);
   }
 
   static String _getCodeString(code) {
     if (code is List<String>) {
       code = code.join('\n');
     }
     return code as String;
   }
 }