Fix links of VirtualDirectory.

pkg/http_server/test/virtual_directory_test.dart

 // Copyright (c) 2013, 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.
 
 import 'dart:async';
 import 'dart:io';
 
 import "package:http_server/http_server.dart";
 import 'package:path/path.dart' as pathos;
 import "package:unittest/unittest.dart";
@@ skipping 98 matching lines @@
           new File('${dir.path}/$i').createSync();
         }
         virDir.allowDirectoryListing = true;
 
         return getAsString(virDir, '/')
           .then((result) {
             expect(result, contains('Index of &#x2F'));
           });
       });
 
+      testVirtualDir('dir-href', (dir) {
+        var virDir = new VirtualDirectory(dir.path);
+        new Directory('${dir.path}/dir').createSync();
+        virDir.allowDirectoryListing = true;
+
+        return getAsString(virDir, '/')
+          .then((result) {
+            expect(result, contains('<a href="dir/">'));
+          });
+      });
+
       testVirtualDir('dirs', (dir) {
         var virDir = new VirtualDirectory(dir.path);
         for (int i = 0; i < 10; i++) {
           new Directory('${dir.path}/$i').createSync();
         }
         virDir.allowDirectoryListing = true;
 
         return getAsString(virDir, '/')
           .then((result) {
             expect(result, contains('Index of &#x2F'));
@@ skipping 58 matching lines @@
         });
 
         testVirtualDir('encoded-path', (dir) {
           var virDir = new VirtualDirectory(dir.path);
           new Directory('${dir.path}/javascript:alert(document);"')
               .createSync();
           virDir.allowDirectoryListing = true;
 
           return getAsString(virDir, '/')
             .then((result) {
-              expect(result, contains('%2Fjavascript%3Aalert(document)%3B%22'));
+              expect(result, contains('javascript%3Aalert(document)%3B%22/'));
             });
         });
 
         testVirtualDir('encoded-special', (dir) {
           var virDir = new VirtualDirectory(dir.path);
           new Directory('${dir.path}/<>&"').createSync();
           virDir.allowDirectoryListing = true;
 
           return getAsString(virDir, '/')
             .then((result) {
               expect(result, contains('&lt;&gt;&amp;&quot;&#x2F;'));
-              expect(result, contains('href="%2F%3C%3E%26%22"'));
+              expect(result, contains('href="%3C%3E%26%22/"'));
             });
         });
       }
     });
 
     group('custom', () {
       testVirtualDir('simple', (dir) {
         var virDir = new VirtualDirectory(dir.path);
         virDir.allowDirectoryListing = true;
         virDir.directoryHandler = (dir2, request) {
@@ skipping 367 matching lines @@
           return virDir.serveFile(new File('${d.path}/file'), request);
         };
 
         return getAsString(virDir, '/')
           .then((result) {
             expect(result, 'file contents');
           });
     });
   });
 }