LayoutTests/fast/dom/StyleSheet/detached-stylesheet-without-wrapper_t01.dart

/*
 * Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 * for details. All rights reserved. Use of this source code is governed by a
 * BSD-style license that can be found in the LICENSE file.
 */
/**
 * @description Test that CSS stylesheets lacking wrappers are pruned from 
 * detached CSSOM subtrees. This is surprising behavior, but it's a very rare 
 * situation, and the behavior actually matches what both WebKit and Gecko 
 * do for DOM nodes in detached subtrees.
 */
import "dart:html";
import "../../../testcommon.dart";

main() {
  var style = new Element.html(
      '''
    <style>
    #test-element {
        text-decoration: line-through;
    }
    </style>
    ''',
      treeSanitizer: new NullTreeSanitizer());
  document.head.append(style);

  document.body.setInnerHtml(
      '''
    <span id="test-element"></div>
    <div>PASS</div>
    ''',
      treeSanitizer: new NullTreeSanitizer());

  int stylesNum = document.styleSheets.length;
  document.head.remove();

  shouldBe(document.getElementById("test-element").getComputedStyle()
      .getPropertyValue('text-decoration'), 'none');
  shouldBeTrue(stylesNum > document.styleSheets.length);
}