Fix a null-pointer reference and minor clean-up

pkg/analysis_server/test/services/correction/fix_test.dart

Index: pkg/analysis_server/test/services/correction/fix_test.dart
diff --git a/pkg/analysis_server/test/services/correction/fix_test.dart b/pkg/analysis_server/test/services/correction/fix_test.dart
index 1136a5e828e297573c22beb8e4ee914633acfc9d..65892205fb70e123f4289e5dcfcf47fd23aae8c3 100644
--- a/pkg/analysis_server/test/services/correction/fix_test.dart
+++ b/pkg/analysis_server/test/services/correction/fix_test.dart
@@ -421,6 +421,22 @@ main() {
     _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 {