Support for observable models, fixes #259

test/data/input/component_field_test.html

Index: test/data/input/component_field_test.html
diff --git a/test/data/input/component_field_test.html b/test/data/input/component_field_test.html
index 1c07ebcb39e14efeaaed7c39f9a5bf872d779d70..1a9d023fda6b215f1f8f120e0ee39d6044704e5f 100644
--- a/test/data/input/component_field_test.html
+++ b/test/data/input/component_field_test.html
@@ -38,9 +38,15 @@
     import 'dart:html';
     import 'package:unittest/unittest.dart';
 
-    var greetings = ['hello', 'hi'];
-    var names = ['world', 'universe'];
-    var endings = ['??', '!!'];
+    @observable
+    var greetings = toObservable(['hello', 'hi']);
+
+    @observable
+    var names = toObservable(['world', 'universe']);
+
+    @observable
+    var endings = toObservable(['??', '!!']);
+
     main() {
       window.setTimeout(() {
         expect(query('x-greeter').attributes, { 'title': 'world' });