Fix bug in Uri.removeFragment.

tests/corelib/uri_test.dart

 // Copyright (c) 2012, 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 uriTest;
 
 import "package:expect/expect.dart";
 import 'dart:convert';
 
-testUri(String uri, bool isAbsolute) {
-  Expect.equals(isAbsolute, Uri.parse(uri).isAbsolute);
-  Expect.stringEquals(uri, Uri.parse(uri).toString());
+testUri(String uriText, bool isAbsolute) {
+  var uri = Uri.parse(uriText);
+
+  Expect.equals(isAbsolute, uri.isAbsolute);
+  Expect.stringEquals(uriText, uri.toString());
 
   // Test equals and hashCode members.
-  Expect.equals(Uri.parse(uri), Uri.parse(uri));
-  Expect.equals(Uri.parse(uri).hashCode, Uri.parse(uri).hashCode);
+  var uri2 = Uri.parse(uriText);
+  Expect.equals(uri, uri2);
+  Expect.equals(uri.hashCode, uri2.hashCode);
+
+  // Test that removeFragment doesn't change anything else.
+  if (uri.hasFragment) {
+    Expect.equals(Uri.parse(uriText.substring(0, uriText.indexOf('#'))),
+                  uri.removeFragment());
+  } else {
+    Expect.equals(uri,
+                  Uri.parse(uriText + "#fragment").removeFragment());
+  }
 }
 
 testEncodeDecode(String orig, String encoded) {
   var e = Uri.encodeFull(orig);
   Expect.stringEquals(encoded, e);
   var d = Uri.decodeFull(encoded);
   Expect.stringEquals(orig, d);
 }
 
 testEncodeDecodeComponent(String orig, String encoded) {
@@ skipping 581 matching lines @@
 String dump(Uri uri) {
   return "URI: $uri\n"
       "  Scheme:    ${uri.scheme} #${uri.scheme.length}\n"
       "  User-info: ${uri.userInfo} #${uri.userInfo.length}\n"
       "  Host:      ${uri.host} #${uri.host.length}\n"
       "  Port:      ${uri.port}\n"
       "  Path:      ${uri.path} #${uri.path.length}\n"
       "  Query:     ${uri.query} #${uri.query.length}\n"
       "  Fragment:  ${uri.fragment} #${uri.fragment.length}\n";
 }