Document-implementation.html

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This WPT test may be referenced by the following Test IDs:
- /dom/nodes/Document-implementation.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset=utf-8>

<title>Document.implementation</title>

<link rel=help href="https://dom.spec.whatwg.org/#dom-document-implementation">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<div id="log"></div>

<script>

test(function() {

  var implementation = document.implementation;

  assert_true(implementation instanceof DOMImplementation,

              "implementation should implement DOMImplementation");

  assert_equals(document.implementation, implementation);

}, "Getting implementation off the same document");

test(function() {

  var doc = document.implementation.createHTMLDocument();

  assert_not_equals(document.implementation, doc.implementation);

}, "Getting implementation off different documents");

</script>