fix(testability): properly throw when no testability available

goderbauer · hankduan · commit 841206c6784e · 2015-08-15T19:44:58.000-07:00
diff --git a/modules/angular2/src/core/testability/get_testability.dart b/modules/angular2/src/core/testability/get_testability.dart
@@ -114,7 +114,9 @@ class GetTestability {
     object['getAngularTestability'] = _jsify((Element elem,
         bool findInAncestors) {
       var testability = registry.findTestabilityInTree(elem, findInAncestors);
-      return _jsify(new PublicTestability(testability));
+      return testability == null
+          ? null
+          : _jsify(new PublicTestability(testability));
     });
     object['getAllAngularTestabilities'] = _jsify(() {
       var publicTestabilities = registry
