Updating custom element's preregister test to follow new contracts.

tests/html/custom_elements_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.
 
 library custom_elements_test;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_individual_config.dart';
 import 'dart:html';
 
 class CustomMixin {
@@ skipping 72 matching lines @@
     });
   });
 
   group('preregister', () {
     // TODO(vsm): Modify this test once we agree on the proper semantics.
     test('pre-registration construction', () {
       var tag = nextTag;
       var dom = new Element.html('<div><$tag></$tag></div>');
       var preElement = dom.children[0];
       expect(preElement, isNotNull);
-      expect(preElement is UnknownElement, isTrue);
+      expect(preElement is HtmlElement, isTrue);
+      expect(preElement is CustomType, isFalse);
       var firedOnPre = false;
       preElement.onFocus.listen((_) {
         firedOnPre = true;
       });
 
       document.register(tag, CustomType);
 
       var postElement = dom.children[0];
       expect(postElement, isNotNull);
       expect(postElement is CustomType, isTrue);
       expect(postElement.onCreatedCalled, isTrue);
 
       // Element from first query remains an UnknownElement.
-      expect(preElement is UnknownElement, isTrue);
-      expect(preElement.parent, isNull);
+      expect(preElement is HtmlElement, isTrue);
+      expect(preElement.parent, dom);
       expect(dom.children.length, 1);
 
       var firedOnPost = false;
       postElement.onFocus.listen((_) {
         firedOnPost = true;
       });
       // Event handlers should not persist to new element.
       postElement.dispatchEvent(new Event('focus'));
-      expect(firedOnPre, isFalse);
+      expect(firedOnPre, isTrue);

[vsm, 2013/08/16 18:28:51]

This doesn't match the comment on line #116.

[blois, 2013/08/16 19:45:48]

Done.

       expect(firedOnPost, isTrue);
     });
   });
 
   group('innerHtml', () {
     test('query', () {
       var tag = nextTag;
       document.register(tag, CustomType);
       var element = new DivElement();
       element.innerHtml = '<$tag></$tag>';
@@ skipping 35 matching lines @@
     test('can invoke mixin methods', () {
       var tag = nextTag;
       document.register(tag, CustomType);
 
       var element = new Element.tag(tag);
       element.invokeMixinMethod();
       expect(element.mixinMethodCalled, isTrue);
     });
   });
 }