LibTest/html/Document/getElementsByClassName_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.

/// @assertion List<Node> getElementsByClassName(String tagname)
/// Returns a list of elements with the given class name.
/// @description Checks that a list of elements with the given class name is returned.

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

const myButton = "myButton";

main() {
  List<Node> lst = document.getElementsByClassName(myButton);
  Expect.equals(0, lst.length);

  var x1 = new Element.html('<button class="$myButton"></button>');
  var y = new DivElement();
  y.append(x1);
  document.body?.append(y);
  lst = document.getElementsByClassName(myButton);
  Expect.equals(1, lst.length);
  Expect.equals(x1, lst[0]);

  var x2 = new Element.html('<div class="$myButton"></div>');
  document.body?.append(x2);
  lst = document.getElementsByClassName(myButton);
  Expect.equals(2, lst.length);
  // order is not guarateed, so cannot compare lists directly
  Expect.isTrue(lst.contains(x1));
  Expect.isTrue(lst.contains(x2));
}