dynamic-item-size.html
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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>
<script src="../../iron-test-helpers/mock-interactions.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="0" pre></x-list>
</template>
</test-fixture>
<script>
suite('Dynamic item size', function() {
var list, container;
setup(function() {
container = fixture('trivialList');
list = container.list;
});
test('update size using item index', function(done) {
list.items = buildDataSet(100);
flush(function() {
var firstItem = getFirstItemFromList(list);
var initHeight = firstItem.offsetHeight;
list.set('items.0.index', '1\n2\n3\n4');
list.updateSizeForItem(0);
assert.isAbove(firstItem.offsetHeight, initHeight*3);
list.set('items.0.index', '1');
list.updateSizeForItem(0);
assert.equal(firstItem.offsetHeight, initHeight);
done();
});
});
test('update size using item object', function(done) {
list.items = buildDataSet(100);
flush(function() {
var firstItem = getFirstItemFromList(list);
var initHeight = firstItem.offsetHeight;
list.set('items.0.index', '1\n2\n3\n4');
list.updateSizeForItem(list.items[0]);
assert.isAbove(firstItem.offsetHeight, initHeight*3);
list.set('items.0.index', '1');
list.updateSizeForItem(list.items[0]);
assert.equal(firstItem.offsetHeight, initHeight);
done();
});
});
test('ignore items that are not rendered', function(done) {
list.items = buildDataSet(100);
flush(function() {
list.updateSizeForItem(list.items[list._physicalCount + 1]);
done();
});
});
test('throw if the item is invalid', function(done) {
list.items = buildDataSet(100);
flush(function() {
var firstItem = getFirstItemFromList(list);
var initHeight = firstItem.offsetHeight;
var throws = 0;
try {
list.updateSizeForItem(100);
} catch (error) {
throws++;
}
try {
list.updateSizeForItem({});
} catch (error) {
throws++;
}
assert.equal(throws, 2);
done();
});
});
});
</script>
</body>
</html>