Fix a null-pointer reference and minor clean-up

pkg/analysis_server/test/services/correction/fix_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.correction.fix;
 
 import 'package:analysis_server/src/protocol.dart' hide AnalysisError;
 import 'package:analysis_server/src/services/correction/fix.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
@@ skipping 403 matching lines @@
 
   method() {}
 }
 main() {
   new A.named(1, 2.0);
 }
 ''');
     _assertLinkedGroup(change.linkedEditGroups[0], ['named(int ', 'named(1']);
   }
 
+  void test_createConstructorForFinalFields_inTopLevelMethod() {
+    resolveTestUnit('''
+main() {
+  final int v;
+}
+''');
+    assertNoFix(FixKind.CREATE_CONSTRUCTOR_FOR_FINAL_FIELDS);
+  }
+
+  void test_createConstructorForFinalFields_topLevelField() {
+    resolveTestUnit('''
+final int v;
+''');
+    assertNoFix(FixKind.CREATE_CONSTRUCTOR_FOR_FINAL_FIELDS);
+  }
+
   void test_createConstructorSuperExplicit() {
     resolveTestUnit('''
 class A {
   A(bool p1, int p2, double p3, String p4, {p5});
 }
 class B extends A {
   B() {}
 }
 ''');
     assertHasFix(FixKind.ADD_SUPER_CONSTRUCTOR_INVOCATION, '''
@@ skipping 3072 matching lines @@
 
   List<Position> _findResultPositions(List<String> searchStrings) {
     List<Position> positions = <Position>[];
     for (String search in searchStrings) {
       int offset = resultCode.indexOf(search);
       positions.add(new Position(testFile, offset));
     }
     return positions;
   }
 }