[whatwg/dom] Test multiple text nodes (#528)

Make sure something like http://jsbin.com/yanutavebu/1/edit?html,js,output is in web-platform-tests.
```
var body = document.body;

var firstName = document.createTextNode('');
var lastName = document.createTextNode('');
var boundary = document.createTextNode('');

body.appendChild(document.createTextNode(''));
body.appendChild(firstName);
body.appendChild(boundary);
body.appendChild(document.createTextNode(' '));
body.appendChild(lastName);
body.appendChild(document.createTextNode(''));
body.appendChild(document.createTextNode(''));

setTimeout(function(){
  boundary.nodeValue = ' ';
  setTimeout(() => boundary.nodeValue = '');
  firstName.nodeValue = 'Freddie';
  lastName.nodeValue = 'Mercury';
}, 2000);
```
Text nodes not being reliable across browsers is rather sad.

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/whatwg/dom/issues/528