Fixes #3730 and inspired by (#3585)

Polymer · Jun 22, 2016 · ab431ed · ab431ed
1 parent b78e5af
commit ab431ed
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/src/lib/dom-tree-api.html b/src/lib/dom-tree-api.html
@@ -215,7 +215,7 @@
         node.__dom.previousSibling.__dom.nextSibling = node;
       }
       // update node <-> ref_node
-      node.__dom.nextSibling = ref_node;
+      node.__dom.nextSibling = ref_node || null;
       if (node.__dom.nextSibling) {
         node.__dom.nextSibling.__dom.previousSibling = node;
       }

diff --git a/test/unit/polymer-dom.js b/test/unit/polymer-dom.js
@@ -704,11 +704,13 @@ suite('Polymer.dom accessors', function() {
     var after = document.createElement('div');
     Polymer.dom(noDistribute).insertBefore(before, child);
     Polymer.dom(noDistribute).appendChild(after);
+    Polymer.dom.flush();
     assert.equal(Polymer.dom(noDistribute).firstChild, before, 'firstChild incorrect');
     assert.equal(Polymer.dom(noDistribute).lastChild, after, 'lastChild incorrect');
     assert.equal(Polymer.dom(before).nextSibling, child, 'nextSibling incorrect');
     assert.equal(Polymer.dom(child).nextSibling, after, 'nextSibling incorrect');
     assert.equal(Polymer.dom(after).previousSibling, child, 'previousSibling incorrect');
+    assert.equal(Polymer.dom(after).nextSibling, null, 'nextSibling incorrect');
     assert.equal(Polymer.dom(child).previousSibling, before, 'previousSibling incorrect');
   });
 
@@ -719,11 +721,13 @@ suite('Polymer.dom accessors', function() {
     var after = document.createElement('div');
     Polymer.dom(distribute).insertBefore(before, child);
     Polymer.dom(distribute).appendChild(after);
+    Polymer.dom.flush();
     assert.equal(Polymer.dom(distribute).firstChild, before, 'firstChild incorrect');
     assert.equal(Polymer.dom(distribute).lastChild, after, 'lastChild incorrect');
     assert.equal(Polymer.dom(before).nextSibling, child, 'nextSibling incorrect');
     assert.equal(Polymer.dom(child).nextSibling, after, 'nextSibling incorrect');
     assert.equal(Polymer.dom(after).previousSibling, child, 'previousSibling incorrect');
+    assert.equal(Polymer.dom(after).nextSibling, null, 'nextSibling incorrect');
     assert.equal(Polymer.dom(child).previousSibling, before, 'previousSibling incorrect');
   });