fasta.CommentToken implement analyzer.CommentToken

pkg/front_end/test/token_test.dart

Index: pkg/front_end/test/token_test.dart
diff --git a/pkg/front_end/test/token_test.dart b/pkg/front_end/test/token_test.dart
index 3570fb3d2e120cf416d66ef78680a050abd64ad3..b6c5497e6c1cd4bbc3249f7187e169917778676f 100644
--- a/pkg/front_end/test/token_test.dart
+++ b/pkg/front_end/test/token_test.dart
@@ -59,18 +59,22 @@ class Foo {
     fasta.Token comment = nextComment();
     expect(comment.lexeme, contains('Single line dartdoc comment'));
     expect(comment.type, TokenType.SINGLE_LINE_COMMENT);
+    expect(comment, new isInstanceOf<DocumentationCommentToken>());
 
     comment = nextComment();
     expect(comment.lexeme, contains('Multi-line dartdoc comment'));
     expect(comment.type, TokenType.MULTI_LINE_COMMENT);
+    expect(comment, new isInstanceOf<DocumentationCommentToken>());
 
     comment = nextComment();
     expect(comment.lexeme, contains('Single line comment'));
     expect(comment.type, TokenType.SINGLE_LINE_COMMENT);
+    expect(comment, new isInstanceOf<CommentToken>());
 
     comment = nextComment();
     expect(comment.lexeme, contains('Multi-line comment'));
     expect(comment.type, TokenType.MULTI_LINE_COMMENT);
+    expect(comment, new isInstanceOf<CommentToken>());
   }
 
   void test_copy() {