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bower_components/iron-list/test/physical-count.html 2.55 KB
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  <!doctype html>
  <!--
  @license
  Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
  This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE
  The complete set of authors may be found at http://polymer.github.io/AUTHORS
  The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS
  Code distributed by Google as part of the polymer project is also
  subject to an additional IP rights grant found at http://polymer.github.io/PATENTS
  -->
  <html>
  <head>
    <meta charset="UTF-8">
    <title>iron-list test</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0">
  
    <script src="../../webcomponentsjs/webcomponents-lite.js"></script>
    <script src="../../web-component-tester/browser.js"></script>
    <script src="../../test-fixture/test-fixture-mocha.js"></script>
  
    <link rel="import" href="../../test-fixture/test-fixture.html">
    <link rel="import" href="../../paper-styles/paper-styles.html">
    <link rel="import" href="helpers.html">
    <link rel="import" href="x-list.html">
  
  </head>
  <body>
  
    <test-fixture id="trivialList">
      <template>
        <x-list item-height="2" list-height="300"></x-list>
      </template>
    </test-fixture>
  
    <script>
  
      suite('dynamic physical count', function() {
        var list, container;
  
        setup(function() {
          container = fixture('trivialList');
          list = container.list;
        });
  
        test('increase pool size', function(done) {
          list.items = buildDataSet(1000);
  
          flush(function() {
            var lastItem = getLastItemFromList(list);
            var lastItemHeight = lastItem.offsetHeight;
            var expectedFinalItem = list.offsetHeight/lastItemHeight;
  
            assert.equal(lastItemHeight, 2);
            assert.equal(getLastItemFromList(list).textContent, expectedFinalItem);
            done();
          });
        });
  
        test('increase pool size on resize', function(done) {
          list.items = buildDataSet(1000);
  
          flush(function() {
            // change the height of the list
            container.listHeight = 500;
            // resize
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            list.fire('iron-resize');
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            flush(function() {
              var lastItem = getLastItemFromList(list);
              var lastItemHeight = lastItem.offsetHeight;
              var expectedFinalItem = list.offsetHeight/lastItemHeight;
  
              assert.equal(lastItemHeight, 2);
              assert.equal(getLastItemFromList(list).textContent, expectedFinalItem);
              done();
            });
          });
        });
  
      });
  
    </script>
  
  </body>
  </html>