  assert.equal(s1.nextElementSibling, s2);
});

test('distribute (forced)', function() {
  var rere = testElement.root.querySelector('x-rereproject');
  var re = rere.root.querySelector('x-reproject');
  var p = re.root.querySelector('x-project');
  var s = document.createElement('span');
  s.id = 'light';
  s.textContent = 'Light';
  rere.appendChild(s);
  assert.equal(rere.querySelector('#light'), s);
  assert.equal(s.parentNode, rere);
  if (checkUnpatchedDom) {
    assert.notEqual(Polymer.TreeApi.Compos