Support for observable models, fixes #259

test/data/expected/element_ctor_test.html.txt

Index: test/data/expected/element_ctor_test.html.txt
diff --git a/test/data/expected/element_ctor_test.html.txt b/test/data/expected/element_ctor_test.html.txt
index f30cee96f59bee3589e0205bb8a3a83ec7abe4db..7a6bc55a24f65ff4f9b7c42809725d84a53ac12d 100644
--- a/test/data/expected/element_ctor_test.html.txt
+++ b/test/data/expected/element_ctor_test.html.txt
@@ -1,9 +1,9 @@
 Content-Type: text/plain
 layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
-layer at (0,0) size 800x163
-  RenderBlock {HTML} at (0,0) size 800x163
-    RenderBody {BODY} at (8,16) size 784x139
+layer at (0,0) size 800x217
+  RenderBlock {HTML} at (0,0) size 800x218
+    RenderBody {BODY} at (8,16) size 784x180
       RenderBlock {P} at (0,0) size 784x20
         RenderText {#text} at (0,0) size 203x19
           text run at (0,0) width 203: "This tests data binding of heading."
@@ -19,4 +19,7 @@ layer at (0,0) size 800x163
             text run at (0,0) width 38: "PASS"
         RenderText {#text} at (0,0) size 0x0
         RenderText {#text} at (0,0) size 0x0
+      RenderBlock {H4} at (0,159) size 784x21
+        RenderText {#text} at (0,0) size 235x19
+          text run at (0,0) width 235: "You should see two \"PASS\" above."
 #EOF