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bower_components/iron-list/test/mutations.html 4.95 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>
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    <script src="../../test-fixture/test-fixture-mocha.js"></script>
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    <link rel="import" href="../../test-fixture/test-fixture.html">
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    <link rel="import" href="helpers.html">
    <link rel="import" href="x-list.html">
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  </head>
  <body>
  
    <test-fixture id="trivialList">
      <template>
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        <x-list></x-list>
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      </template>
    </test-fixture>
  
    <script>
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      suite('mutations to items', function() {
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        var list, container;
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        setup(function() {
          container = fixture('trivialList');
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          list = container.list;
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        });
  
        test('update physical item', function(done) {
          var setSize = 100;
          var phrase = 'It works!';
  
          list.items = buildDataSet(setSize);
  
          list.set('items.0.index', phrase);
  
          flush(function() {
            assert.equal(getFirstItemFromList(list).textContent, phrase);
            done();
          });
        });
  
        test('update virtual item', function(done) {
          var setSize = 100;
          var phrase = 'It works!';
  
          list.items = buildDataSet(setSize);
  
          function scrollBackUp() {
            simulateScroll({
              list: list,
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              contribution: 100,
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              target: 0
            }, function() {
              flush(function() {
                assert.equal(getFirstItemFromList(list).textContent, phrase);
                done();
              });
            });
          }
  
          flush(function() {
            var rowHeight = list._physicalItems[0].offsetHeight;
            // scroll down
            simulateScroll({
              list: list,
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              contribution: 100,
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              target: setSize*rowHeight
            }, function() {
              list.set('items.0.index', phrase);
              flush(scrollBackUp);
            });
          });
        });
  
        test('push', function(done) {
          var setSize = 100;
  
          list.items = buildDataSet(setSize);
          setSize = list.items.length;
  
          list.push('items', buildItem(setSize));
          assert.equal(list.items.length, setSize + 1);
  
          flush(function() {
            var rowHeight = list._physicalItems[0].offsetHeight;
            var viewportHeight = list.offsetHeight;
            var itemsPerViewport = Math.floor(viewportHeight/rowHeight);
  
            assert.equal(getFirstItemFromList(list).textContent, 0);
  
            simulateScroll({
              list: list,
              contribution: rowHeight,
              target: list.items.length*rowHeight
            }, function() {
              assert.equal(getFirstItemFromList(list).textContent,
                  list.items.length - itemsPerViewport);
              done();
            });
          })
        });
  
        test('pop', function(done) {
          var setSize = 100;
          list.items = buildDataSet(setSize);
  
          flush(function() {
            var rowHeight = list._physicalItems[0].offsetHeight;
  
            simulateScroll({
              list: list,
              contribution: rowHeight,
              target: setSize*rowHeight
            }, function() {
              var viewportHeight = list.offsetHeight;
              var itemsPerViewport = Math.floor(viewportHeight/rowHeight);
  
              list.pop('items');
  
              flush(function() {
                assert.equal(list.items.length, setSize-1);
                assert.equal(getFirstItemFromList(list).textContent, setSize - 3 - 1);
                done();
              });
            });
          });
        });
  
        test('splice', function(done) {
          var setSize = 45;
          var phrase = 'It works!'
          list.items = buildDataSet(setSize);
  
          list.splice('items', 0, setSize, buildItem(phrase));
  
          flush(function() {
            assert.equal(list.items.length, 1);
            assert.equal(getFirstItemFromList(list).textContent, phrase);
            done();
          });
        });
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        test('delete item and scroll to bottom', function() {
          var setSize = 100, index;
  
          list.items = buildDataSet(setSize);
  
          while (list.items.length > 10) {
            index = parseInt(list.items.length * Math.random());
            list.arrayDelete('items',  list.items[index]);
            list.scrollToIndex(list.items.length - 1);
            assert.isTrue(/^[0-9]*$/.test(getFirstItemFromList(list).textContent));
          }
        });
  
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      });
    </script>
  
  </body>
  </html>