| /* |
| * 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. |
| */ |
| /** |
| * @assertion final Element previousElementSibling |
| * The element immediately preceding the given one in the tree, or null if |
| * there is no sibling element. |
| * @description Checks expected attribute values. |
| */ |
| import "dart:html"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| var x = new Element.html('<span></span>'); |
| Expect.isNull(x.previousElementSibling); |
| |
| x = new Element.html( |
| '<div><span id="span1"></span>text-node<span id="span2"></span></div>'); |
| var y = x.querySelector('#span2'); |
| |
| y = y?.previousElementSibling; // span1, text node should be skipped |
| Expect.isTrue(y is SpanElement?); |
| |
| y = y?.previousElementSibling; |
| Expect.isNull(y); |
| } |