Resynthesize ParameterElementImpl.parameterKind lazily.

pkg/analyzer/test/src/summary/resynthesize_test.dart

 // Copyright (c) 2015, 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.src.serialization.elements_test;
 
 import 'dart:convert';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/constant/value.dart';
@@ skipping 898 matching lines @@
           originalParameters[i],
           '$desc parameter ${originalParameters[i].name}');
     }
   }
 
   void compareParameterElements(
       ParameterElement resynthesized, ParameterElement original, String desc) {
     compareVariableElements(resynthesized, original, desc);
     compareParameterElementLists(
         resynthesized.parameters, original.parameters, desc);
-    expect(resynthesized.parameterKind, original.parameterKind);
+    expect(resynthesized.parameterKind, original.parameterKind, reason: desc);
     expect(resynthesized.isInitializingFormal, original.isInitializingFormal,
         reason: desc);
     expect(resynthesized is FieldFormalParameterElementImpl,
         original is FieldFormalParameterElementImpl);
     if (resynthesized is FieldFormalParameterElementImpl &&
         original is FieldFormalParameterElementImpl) {
       if (original.field == null) {
         expect(resynthesized.field, isNull, reason: '$desc field');
       } else {
         expect(resynthesized.field, isNotNull, reason: '$desc field');
@@ skipping 3682 matching lines @@
       fail('Unexpectedly tried to get unlinked summary for $uri');
     }
     return serializedUnit;
   }
 
   @override
   bool hasLibrarySummary(String uri) {
     return true;
   }
 }