Token of an empty comment reference should end with EOF.

pkg/analyzer/test/generated/parser_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 analyzer.test.generated.parser_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/src/dart/ast/token.dart';
@@ skipping 6245 matching lines @@
         parse("parseCommentReference", <Object>["", 5], "");
     SimpleIdentifier identifier = EngineTestCase.assertInstanceOf(
         (obj) => obj is SimpleIdentifier,
         SimpleIdentifier,
         reference.identifier);
     expect(identifier, isNotNull);
     expect(identifier.isSynthetic, isTrue);
     expect(identifier.token, isNotNull);
     expect(identifier.name, "");
     expect(identifier.offset, 5);
+    // Should end with EOF token.
+    Token nextToken = identifier.token.next;
+    expect(nextToken, isNotNull);
+    expect(nextToken.type, TokenType.EOF);
   }
 
   void test_parseCommentReferences_multiLine() {
     DocumentationCommentToken token = new DocumentationCommentToken(
         TokenType.MULTI_LINE_COMMENT, "/** xxx [a] yyy [bb] zzz */", 3);
     List<DocumentationCommentToken> tokens = <DocumentationCommentToken>[token];
     List<CommentReference> references =
         parse("parseCommentReferences", <Object>[tokens], "")
         as List<CommentReference>;
     List<Token> tokenReferences = token.references;
@@ skipping 4897 matching lines @@
         new Scanner(null, new CharSequenceReader(source), listener);
     Token tokenStream = scanner.tokenize();
     //
     // Parse the source.
     //
     Parser parser = new Parser(null, listener);
     return invokeParserMethodImpl(
         parser, methodName, <Object>[tokenStream], tokenStream) as Token;
   }
 }