[mdv] template.ref must recursive to find the original source template

pkg/mdv/test/template_element_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 template_element_test;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:html';
 import 'dart:math' as math;
@@ skipping 1331 matching lines @@
     deliverChanges(m);
     expect(div.nodes.length, 7);
     expect(div.nodes[5].text, 'Name: Leela');
 
     m[sym('friend')] = toSymbols({'name': 'Leela'});
     deliverChanges(m);
     expect(div.nodes.length, 5);
     expect(div.nodes[3].text, 'Name: Leela');
   });
 
+  observeTest('RecursiveRef', () {
+    var div = createTestHtml(
+        '<template bind>' +

[justinfagnani, 2013/07/19 22:11:09]

no need for +s

[Jennifer Messerly, 2013/07/23 02:51:31]

Done.

+          '<template id=src>{{ foo }}</template>' +
+          '<template bind ref=src></template>' +
+        '</template>');
+
+    var m = toSymbols({ 'foo': 'bar'});

[justinfagnani, 2013/07/19 22:11:09]

extra space before 'foo'

[Jennifer Messerly, 2013/07/23 02:51:31]

Done.

+    recursivelySetTemplateModel(div, m);
+    performMicrotaskCheckpoint();
+
+    expect(div.nodes.length, 4);
+    expect(div.nodes[3].text, 'bar');
+  });
+
   observeTest('ChangeFromBindToRepeat', () {
     var div = createTestHtml(
         '<template bind="{{a}}">'
           '{{ length }}'
         '</template>');
     var template = div.nodes.first;
 
     // Note: this test data is a little different from the JS version, because
     // we allow binding to the "length" field of the Map in preference to
     // binding keys.
@@ skipping 320 matching lines @@
       k = k is String ? sym(k) : _deepToSymbol(k);
       result[k] = _deepToSymbol(v);
     });
     return result;
   }
   if (value is Iterable) {
     return value.map(_deepToSymbol).toList();
   }
   return value;
 }