overlay_test.html - Android社区 - https://www.androidos.net.cn/

<!DOCTYPE html>
<html>
<!--
Copyright (c) 2012 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<head>
<title>Overlay tests</title>
<script src="base.js"></script>
</head>
<body>
<script>
'use strict';

base.require('unittest');
base.require('test_utils');
base.require('overlay');

var sandbox = document.getElementById('sandbox');
var overlay;


function testShowHideUnparented() {
  overlay = new tracing.ui.Overlay();
  overlay.innerHTML =
      '<h3>Hello</h3>B1:<button>foo</button></p>B2:<button>blah</button>';
  overlay.visible = true;
  assertNotEquals(overlay.parentNode, null);

  overlay.visible = false;
  assertEquals(overlay.parentNode, null);
}

function testShowHideParented() {
  overlay = new tracing.ui.Overlay();
  overlay.innerHTML =
      '<h3>Hello</h3>B1:<button>foo</button></p>B2:<button>blah</button>';
  document.body.appendChild(overlay);
  overlay.visible = true;
  assertNotEquals(overlay.parentNode, null);

  overlay.visible = false;
  assertEquals(overlay.parentNode, document.body);
}

</script>

</body>
</html>