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Skulpt is a Javascript implementation of Python 2.x. Python that runs in your browser!
www.skulpt.org
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HTML
<!DOCTYPE html>
<html>
<!--
Copyright 2009 The Closure Library Authors. All Rights Reserved.

Use of this source code is governed by an Apache 2.0 License.
See the COPYING file for details.
-->
<!--
  Author: goto@google.com (Sam Goto)
-->
<head>
<title>Closure Unit Tests - goog.ui.media.Youtube</title>
<script src="../../base.js"></script>
<script>
  goog.require('goog.debug.Logger');
  goog.require('goog.dom');
  goog.require('goog.events');
  goog.require('goog.testing.jsunit');
  goog.require('goog.testing.LooseMock');
  goog.require('goog.ui.Component');
  goog.require('goog.ui.Control');
  goog.require('goog.ui.ControlRenderer');
  goog.require('goog.ui.media.FlashObject');
  goog.require('goog.ui.media.Media');
  goog.require('goog.ui.media.Youtube');
  goog.require('goog.ui.media.YoutubeModel');
</script>
</head>
<body>
<script>

  var youtube;
  var control;
  var YOUTUBE_VIDEO_ID = 'dMH0bHeiRNg';
  var YOUTUBE_URL = 'http://www.youtube.com/watch?v=' + YOUTUBE_VIDEO_ID;
  var parent = goog.dom.createElement('div');

  function setUp() {
    var model = new goog.ui.media.YoutubeModel(
        YOUTUBE_VIDEO_ID, 'evolution of dance');
    control = goog.ui.media.Youtube.newControl(model);
  }

  function tearDown() {
    control.dispose();
  }

  function testBasicRendering() {
    control.render(parent);
    var el = goog.dom.getElementsByTagNameAndClass('div',
        goog.ui.media.Youtube.CSS_CLASS, parent);
    assertEquals(1, el.length);
  }

  function testParsingUrl() {
    var model = goog.ui.media.YoutubeModel.newInstance(YOUTUBE_URL);
    assertEquals('dMH0bHeiRNg', model.getVideoId());

    var model = goog.ui.media.YoutubeModel.newInstance(
        'http://br.youtube.com/watch?v=dMH0bHeiRNg');
    assertEquals('dMH0bHeiRNg', model.getVideoId());

    assertEquals('dMH0bHeiRNg', goog.ui.media.YoutubeModel.newInstance(
        'https://br.youtube.com/watch?v=dMH0bHeiRNg').getVideoId());

    assertEquals('dMH0bHeiRNg', goog.ui.media.YoutubeModel.newInstance(
        'https://br.youtube.com/watch?v=dMH0bHeiRNg&featured=dir')
        .getVideoId());

    assertEquals('dMH0bHeiRNg', goog.ui.media.YoutubeModel.newInstance(
        'https://br.youtube.com/watch?featured=dir&amp;v=dMH0bHeiRNg')
        .getVideoId());

    assertEquals('qbce2yN81mE', goog.ui.media.YoutubeModel.newInstance(
        'http://www.youtube.com/watch?usg=AFQjCNFf90gdVBmPp-Wgya5_CTSaw&amp;' +
        'v=qbce2yN81mE&amp;source=video&amp;vgc=rss').getVideoId());

    assertThrows('youtube parser expects a well formed URL', function() {
      var videoId = goog.ui.media.YoutubeModel.newInstance(
          'http://invalidUrl/watch?v=dMH0bHeiRNg').getVideoId();
    });
  }

  function testBuildingUrl() {
    assertEquals(
        YOUTUBE_URL, goog.ui.media.YoutubeModel.buildUrl(YOUTUBE_VIDEO_ID));
  }

  function testCreatingModel() {
    var model = new goog.ui.media.YoutubeModel(YOUTUBE_VIDEO_ID);
    assertEquals(YOUTUBE_VIDEO_ID, model.getVideoId());
    assertEquals(YOUTUBE_URL, model.getUrl());
    assertUndefined(model.getCaption());
  }

  function testCreatingDomOnInitialState() {
    control.render(parent);
    var preview = goog.dom.getElementsByTagNameAndClass(
        'img',
        goog.ui.media.Youtube.CSS_CLASS + '-thumbnail0',
        parent);
    assertEquals(1, preview.length);

    var caption = goog.dom.getElementsByTagNameAndClass(
        'div',
        goog.ui.media.Youtube.CSS_CLASS + '-caption',
        parent);
    assertEquals(1, caption.length);

    var flash = goog.dom.getElementsByTagNameAndClass('div',
        goog.ui.media.FlashObject.CSS_CLASS);
    assertEquals(0, flash.length);
  }

  function testCreatingDomOnSelectedState() {
    control.render(parent);
    control.setSelected(true);
    var preview = goog.dom.getElementsByTagNameAndClass(
        'img',
        goog.ui.media.Youtube.CSS_CLASS + '-preview',
        parent);
    assertEquals(0, preview.length);

    var caption = goog.dom.getElementsByTagNameAndClass(
        'div',
        goog.ui.media.Youtube.CSS_CLASS + '-caption',
        parent);
    assertEquals(1, caption.length);

    var flash = goog.dom.getElementsByTagNameAndClass('div',
        goog.ui.media.FlashObject.CSS_CLASS, parent);
    assertEquals(1, flash.length);
  }

  function testSettingSelectedStateAfterRender() {
    control.render(parent);
    control.setSelected(true);

    var preview = goog.dom.getElementsByTagNameAndClass(
        'img',
        goog.ui.media.Youtube.CSS_CLASS + '-preview',
        parent);
    assertEquals(0, preview.length);

    var caption = goog.dom.getElementsByTagNameAndClass(
        'div',
        goog.ui.media.Youtube.CSS_CLASS + '-caption',
        parent);
    assertEquals(1, caption.length);

    var flash = goog.dom.getElementsByTagNameAndClass('div',
        goog.ui.media.FlashObject.CSS_CLASS. parent);
    assertEquals(1, flash.length);

    control.setSelected(false);

    var preview = goog.dom.getElementsByTagNameAndClass(
        'img',
        goog.ui.media.Youtube.CSS_CLASS + '-thumbnail0',
        parent);
    assertEquals(1, preview.length);

    var caption = goog.dom.getElementsByTagNameAndClass(
        'div',
        goog.ui.media.Youtube.CSS_CLASS + '-caption',
        parent);
    assertEquals(1, caption.length);

    // setting select as false doesn't actually remove the flash movie from
    // the DOM tree, which means that setting selected to true won't actually
    // restart the movie. TODO(user): fix this.
    var flash = goog.dom.getElementsByTagNameAndClass('div',
        goog.ui.media.FlashObject.CSS_CLASS, parent);
    assertEquals(1, flash.length);

    control.setSelected(true);

    var flash = goog.dom.getElementsByTagNameAndClass('div',
        goog.ui.media.FlashObject.CSS_CLASS, parent);
    assertEquals(1, flash.length);
  }
</script>
</body>
</html>