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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 2008 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: antman@google.com (Reuben Antman)
-->
<head>
  <title>Closure Unit Tests - goog.ui.DatePicker</title>
  <script src="../base.js"></script>
  <script>
    goog.require('goog.dom');
    goog.require('goog.events');
    goog.require('goog.i18n.DateTimeSymbols_en_US');
    goog.require('goog.i18n.DateTimeSymbols_zh_HK');
    goog.require('goog.style');
    goog.require('goog.testing.jsunit');
    goog.require('goog.ui.DatePicker');
  </script>
</head>
<body>
<div id="sandbox"></div>
<script>
  var picker;
  var $$ = goog.dom.getElementsByTagNameAndClass;
  var sandbox = goog.dom.getElement('sandbox');

  function tearDown() {
    picker.dispose();
    goog.dom.removeChildren(sandbox);
  }

  function testIsMonthOnLeft() {
    goog.i18n.DateTimeSymbols = goog.i18n.DateTimeSymbols_en_US;
    picker = new goog.ui.DatePicker();
    picker.create(sandbox);
    var head = $$('tr', 'goog-date-picker-head')[0];
    var month = $$('button', 'goog-date-picker-month',
        head.firstChild)[0];
    assertSameElements(
        'Button element must have expected class names',
        ['goog-date-picker-btn','goog-date-picker-month'],
        goog.dom.classes.get(month)
    );
  }

  function testIsYearOnLeft() {
    goog.i18n.DateTimeSymbols = goog.i18n.DateTimeSymbols_zh_HK;
    picker = new goog.ui.DatePicker();
    picker.create(sandbox);
    var head = $$('tr', 'goog-date-picker-head')[0];
    var year = $$('button', 'goog-date-picker-year',
        head.firstChild)[0];
    assertSameElements(
        'Button element must have expected class names',
        ['goog-date-picker-btn','goog-date-picker-year'],
        goog.dom.classes.get(year)
    );
  }

  function testHidingOfTableFoot0() {
    picker = new goog.ui.DatePicker();
    picker.setAllowNone(false);
    picker.setShowToday(false);
    picker.create(sandbox);
    var tFoot = $$('tfoot')[0];
    assertFalse(goog.style.isElementShown(tFoot))
  }

  function testHidingOfTableFoot1() {
    picker = new goog.ui.DatePicker();
    picker.setAllowNone(false);
    picker.setShowToday(true);
    picker.create(sandbox);
    var tFoot = $$('tfoot')[0];
    assertTrue(goog.style.isElementShown(tFoot))
  }

  function testHidingOfTableFoot2() {
    picker = new goog.ui.DatePicker();
    picker.setAllowNone(true);
    picker.setShowToday(false);
    picker.create(sandbox);
    var tFoot = $$('tfoot')[0];
    assertTrue(goog.style.isElementShown(tFoot))
  }

  function testHidingOfTableFoot3() {
    picker = new goog.ui.DatePicker();
    picker.setAllowNone(true);
    picker.setShowToday(true);
    picker.create(sandbox);
    var tFoot = $$('tfoot')[0];
    assertTrue(goog.style.isElementShown(tFoot))
  }

  function testHidingOfTableFootAfterCreate0() {
    picker = new goog.ui.DatePicker();
    picker.create(sandbox);
    picker.setAllowNone(false);
    picker.setShowToday(false);
    var tFoot = $$('tfoot')[0];
    assertFalse(goog.style.isElementShown(tFoot))
  }

  function testHidingOfTableFootAfterCreate1() {
    picker = new goog.ui.DatePicker();
    picker.create(sandbox);
    picker.setAllowNone(false);
    picker.setShowToday(true);
    var tFoot = $$('tfoot')[0];
    assertTrue(goog.style.isElementShown(tFoot))
  }

  function testHidingOfTableFootAfterCreate2() {
    picker = new goog.ui.DatePicker();
    picker.create(sandbox);
    picker.setAllowNone(true);
    picker.setShowToday(false);
    var tFoot = $$('tfoot')[0];
    assertTrue(goog.style.isElementShown(tFoot))
  }

  function testHidingOfTableFootAfterCreate3() {
    picker = new goog.ui.DatePicker();
    picker.create(sandbox);
    picker.setAllowNone(true);
    picker.setShowToday(true);
    var tFoot = $$('tfoot')[0];
    assertTrue(goog.style.isElementShown(tFoot))
  }

  function testSetDate() {
    picker = new goog.ui.DatePicker();
    picker.createDom();
    picker.enterDocument();
    var selectEvents = 0;
    var changeEvents = 0;
    goog.events.listen(picker, goog.ui.DatePicker.Events.SELECT,
        function() {
          selectEvents++;
        });
    goog.events.listen(picker, goog.ui.DatePicker.Events.CHANGE,
        function() {
          changeEvents++;
        });

    // Set date.
    picker.setDate(new Date(2010, 1, 26));
    assertEquals('no select event dispatched', 1, selectEvents);
    assertEquals('no change event dispatched', 1, changeEvents);
    assertTrue('date is set',
        new goog.date.Date(2010, 1, 26).equals(picker.getDate()));

    // Set date to same date.
    picker.setDate(new Date(2010, 1, 26));
    assertEquals('1 select event dispatched', 2, selectEvents);
    assertEquals('no change event dispatched', 1, changeEvents);

    // Set date to different date.
    picker.setDate(new Date(2010, 1, 27));
    assertEquals('another select event dispatched', 3, selectEvents);
    assertEquals('1 change event dispatched', 2, changeEvents);

    // Set date to none.
    picker.setDate(null);
    assertEquals('another select event dispatched', 4, selectEvents);
    assertEquals('another change event dispatched', 3, changeEvents);
    assertNull('date cleared', picker.getDate());
  }

  function testEventListenerLeaks() {
    var listeners = goog.events.getTotalListenerCount();
    picker = new goog.ui.DatePicker();
    assertEquals('no listeners registered in constructor', listeners,
        goog.events.getTotalListenerCount());
    picker.createDom();
    picker.enterDocument();
    picker.exitDocument();
    assertEquals('exitDocument cleans up all listeners', listeners,
        goog.events.getTotalListenerCount());
  }

</script>
</body>
</html>