ode;
    while (node = walker.nextNode()) {
      if (node.nextSibling) {
        assert_not_equals(node.nextSibling.nodeType, Node.TEXT_NODE,
                          'text node "' + node.nodeValue + '" is next to "' +
                          node.nextSibling.nodeValue + '"');
      }
    }
  }, desc);
}

[
  ['<img src="#">foo<img src="#">',
   () => {
     getSelection().collapse(div, 1);
     document.execCommand("inserttext", false, "x");
   },
   "Simple insertText"],
  ['<p>editor</p>',
   () => {