Fix display of parameter lists in servers Element structure (issue 24194)

pkg/analysis_server/test/protocol_server_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.computer.element;
 
 import 'dart:mirrors';
 
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/protocol_server.dart';
@@ skipping 499 matching lines @@
     expect(element.parameters, isNull);
     expect(element.returnType, isNull);
     expect(element.flags, 0);
   }
 
   void test_fromElement_METHOD() {
     engine.Source source = addSource(
         '/test.dart',
         '''
 class A {
-  static List<String> myMethod(int a, {String b}) {
+  static List<String> myMethod(int a, {String b, int c}) {
     return null;
   }
 }''');
     engine.CompilationUnit unit = resolveLibraryUnit(source);
     engine.MethodElement engineElement = findElementInUnit(unit, 'myMethod');
     // create notification Element
     Element element = newElement_fromEngine(engineElement);
     expect(element.kind, ElementKind.METHOD);
     expect(element.name, 'myMethod');
     {
       Location location = element.location;
       expect(location.file, '/test.dart');
       expect(location.offset, 32);
       expect(location.length, 'myGetter'.length);
       expect(location.startLine, 2);
       expect(location.startColumn, 23);
     }
-    expect(element.parameters, '(int a, {String b})');
+    expect(element.parameters, '(int a, {String b, int c})');
     expect(element.returnType, 'List<String>');
     expect(element.flags, Element.FLAG_STATIC);
   }
 
   void test_fromElement_SETTER() {
     engine.Source source = addSource(
         '/test.dart',
         '''
 class A {
   set mySetter(String x) {}
@@ skipping 95 matching lines @@
           ApiEnum apiValue = convert(engineValue);
           expect(apiValue, equals(expectedResult));
         }
       } else {
         ApiEnum apiValue = convert(engineValue);
         expect(apiValue.name, equals(enumName));
       }
     });
   }
 }