update elements and fix some bugs

test/iron_selector_multi_test.dart

 // Copyright (c) 2015, 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.
 @TestOn('browser')
 library polymer_elements.test.iron_selector_multi_test;
 
 import 'dart:html';
+import 'package:polymer_interop/polymer_interop.dart';
 import 'package:polymer_elements/iron_selector.dart';
 import 'package:test/test.dart';
 import 'package:web_components/web_components.dart';
 import 'common.dart';
 
 main() async {
   await initWebComponents();
 
   group('multi', () {
     IronSelector s;
@@ skipping 56 matching lines @@
       // tap on already selected item should deselect it
       s.children[0].dispatchEvent(new CustomEvent('tap', canBubble: true));
       // check selectedValues
       expect(s.selectedValues.length, 0);
       // check class
       expect(s.children[0].classes.contains('iron-selected'), isFalse);
       // check events
       expect(selectEventCounter, 1);
       expect(deselectEventCounter, 1);
     });
+    
+    test('fires selected-values-changed when selection changes', () {
+      var selectedValuesChangedEventCounter = 0;
+
+      s.on['selected-values-changed'].listen((e) {
+        selectedValuesChangedEventCounter++;
+      });
+
+      tap(Polymer.dom(s).children[0]);
+      tap(Polymer.dom(s).children[0]);
+      tap(Polymer.dom(s).children[0]);
+
+      expect(selectedValuesChangedEventCounter, isNot(0));
+    });
+
+    test('selects from items created by dom-repeat', () async {
+      var selectEventCounter = 0;
+      var firstChild;
+
+      s = document.querySelector('#repeatedItems');
+      s.on['iron-select'].first.then((e) {
+        selectEventCounter++;
+      });
+
+      // NOTE(cdata): I guess `dom-repeat` doesn't stamp synchronously..
+      await wait(1);
+      firstChild = Polymer.dom(s).querySelector('div');
+      tap(firstChild);
+
+      expect(s.selectedItems[0].text, 'foo');
+    });
 
     /* test('toggle multi from true to false', () {
       // set selected
       s.selected = [0, 2];
       var first = s.selected[0];
       // set mutli to false, so to make it single-selection
       s.multi = false;
       // selected should not be an array
       assert.isNotArray(s.selected);
       // selected should be the first value from the old array
       expect(s.selected, first);
     }); */
 
   });
 }