Add test for Polymer.dom().getOwnerRoot.

test/unit/polymer-dom-elements.html

@@ -58,24 +58,33 @@
 </script>
 
 <dom-module id="x-distribute">
-    <template>
-      <div>
-        <span>Elements without test attribute</span>
-        <div id="notTestContainer" style="color: white; background-color: green; min-height: 1em;">
-          <content id="notTestContent" select=":not([test])"></content>
-        </div>
-        <span>Elements with test attribute</span>
-        <div style="color: white; background-color: red; min-height: 1em;">
-          <div id="testContainer">
-            <content id="testContent" select="[test]"></content>
-          </div>
+  <template>
+    <div>
+      <span>Elements without test attribute</span>
+      <div id="notTestContainer" style="color: white; background-color: green; min-height: 1em;">
+        <content id="notTestContent" select=":not([test])"></content>
+      </div>
+      <span>Elements with test attribute</span>
+      <div style="color: white; background-color: red; min-height: 1em;">
+        <div id="testContainer">
+          <content id="testContent" select="[test]"></content>
         </div>
       </div>
-    </template>
-  </dom-element>
-  
-  <script>
-    Polymer({
-      is: "x-distribute"      
-    });
-  </script>
+    </div>
+  </template>
+</dom-element>
+
+<script>
+  Polymer({
+    is: "x-distribute"      
+  });
+</script>
+
+<dom-module id="x-compose">
+  <template><x-project id="project"></x-project></template>
+</dom-module>
+<script>
+  Polymer({
+    is: 'x-compose'
+  });
+</script>

test/unit/polymer-dom.js

@@ -373,4 +373,18 @@ suite('Polymer.dom non-distributed elements', function() {
     testWithAttr();
   });
 
-});
+  test('getOwnerRoot', function() {
+    var test = document.createElement('div');
+    var c1 = document.createElement('x-compose');
+    var c2 = document.createElement('x-compose');
+    Polymer.dom(c1.$.project).appendChild(test);
+    Polymer.dom.flush();
+    assert.equal(Polymer.dom(test).getOwnerRoot(), c1.root, 'getOwnerRoot incorrect for child added to element in root');
+    Polymer.dom(c2.$.project).appendChild(test);
+    Polymer.dom.flush();
+    assert.equal(Polymer.dom(test).getOwnerRoot(), c2.root, 'getOwnerRoot not correctly reset when element moved to different root');
+    Polymer.dom(c1).appendChild(test);
+    assert.notOk(Polymer.dom(test).getOwnerRoot(), 'getOwnerRoot incorrect for child moved from a root to no root');
+  });
+
+});