LibTest/html/Element/attributeChanged_A01_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.

// @dart = 2.9

/// @assertion void attributeChanged(String name, String oldValue, String newValue)
/// Called by the DOM whenever an attribute on this has been changed.
/// @description Checks that attributeChanged is called and called with correct
/// parameters.
/// @needsreview causes timeout if Expect.equals fails

import "dart:html";
import "../../../Utils/expect.dart";
import "../testcommon.dart";

class Foo extends HtmlElement {
  Foo.created() : super.created();
  attributeChanged(String name, String oldValue, String newValue) {
    super.attributeChanged(name, oldValue, newValue);
    Expect.equals('foo', name, 'name');
    Expect.equals('old-val', oldValue, 'old-val');
    Expect.equals('new-val', newValue, 'new-val');
    asyncEnd();
  }
}

main() {
  var tag = 'x-foo';
  document.register(tag, Foo);
  var x = new Element.html('<$tag foo="old-val"></$tag>',
      treeSanitizer: new NullTreeSanitizer());

  asyncStart();
  x.attributes['foo'] = 'new-val';
}