Fix invalid initializing formal by adding a field

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.
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/edit/fix/fix_core.dart';
 import 'package:analysis_server/plugin/edit/fix/fix_dart.dart';
 import 'package:analysis_server/src/services/correction/fix.dart';
 import 'package:analysis_server/src/services/correction/fix_internal.dart';
@@ skipping 1939 matching lines @@
 import 'libB.dart';
 class C {
   A test;
 }
 main(C c) {
   c.test = getA();
 }
 ''');
   }
 
+  test_createField_invalidInitializer_withoutType() async {
+    await resolveTestUnit('''
+class C {
+  C(this.text);
+}
+''');
+    await assertHasFix(
+        DartFixKind.CREATE_FIELD,
+        '''
+class C {
+  var text;
+
+  C(this.text);
+}
+''');
+  }
+
+  test_createField_invalidInitializer_withType() async {
+    await resolveTestUnit('''
+class C {
+  C(String this.text);
+}
+''');
+    await assertHasFix(
+        DartFixKind.CREATE_FIELD,
+        '''
+class C {
+  String text;
+
+  C(String this.text);
+}
+''');
+  }
+
   test_createField_setter_generic_BAD() async {
     await resolveTestUnit('''
 class A {
 }
 class B<T> {
   List<T> items;
   main(A a) {
     a.test = items;
   }
 }
@@ skipping 4897 matching lines @@
   @override
   final AnalysisError error;
 
   _DartFixContextImpl(this.resourceProvider, this.analysisDriver,
       this.astProvider, this.unit, this.error);
 
   @override
   GetTopLevelDeclarations get getTopLevelDeclarations =>
       analysisDriver.getTopLevelNameDeclarations;
 }