Test that analysis server and analysis engine enums properly match.

pkg/analysis_server/tool/spec/codegen_dart_protocol.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 codegen.protocol;
 
 import 'dart:convert';
 
 import 'api.dart';
 import 'codegen_dart.dart';
@@ skipping 702 matching lines @@
    */
   void emitEnumClass(String className, TypeEnum type, ImpliedType impliedType) {
     docComment(toHtmlVisitor.collectHtml(() {
       toHtmlVisitor.p(() {
         toHtmlVisitor.write(impliedType.humanReadableName);
       });
       if (impliedType.type != null) {
         toHtmlVisitor.showType(null, impliedType.type);
       }
     }));
-    writeln('class $className {');
+    writeln('class $className implements Enum {');
     indent(() {
       if (emitSpecialStaticMembers(className)) {
         writeln();
       }
       for (TypeEnumValue value in type.values) {
         docComment(toHtmlVisitor.collectHtml(() {
           toHtmlVisitor.translateHtml(value.html);
         }));
         String valueString = literalString(value.value);
         writeln(
@@ skipping 439 matching lines @@
   CodegenProtocolVisitor visitor = new CodegenProtocolVisitor(readApi());
   return visitor.collectCode(visitor.visitApi);
 });
 
 /**
  * Translate spec_input.html into protocol_matchers.dart.
  */
 main() {
   target.generate();
 }