73bcce88
 luigser
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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="../iron-list.html">
</head>
<body>
<test-fixture id="trivialList">
<template>
<template is="dom-bind">
<style>
:host {
@apply(--layout-fit);
@apply(--layout-vertical);
display: block;
}
iron-list {
height: 300px;
}
.item:nth-child(odd) {
height: 100px;
background-color: green;
color: white;
}
.item:nth-child(even) {
height: 100px;
background-color: red;
color: white;
}
</style>
<iron-list items="[[data]]" as="item">
<template>
<div class="item">[[item.index]]</div>
</template>
</iron-list>
</template>
</template>
</test-fixture>
<script>
function findElementInList(container, selector) {
var i = 0;
var children = container._children;
var ms = Polymer.DomApi.matchesSelector;
for (; i < children.length; i++) {
if (children[i].nodeType === Node.ELEMENT_NODE && ms.call(children[i], selector)) {
return children[i];
}
}
return null;
}
function buildItem(index) {
return {
index: index
};
}
function buildDataSet(size) {
var data = [];
while (data.length < size) {
data.push(buildItem(data.length));
}
return data;
}
function simulateScroll(config, fn) {
var list = config.list;
var target = config.target;
var delay = config.delay || 1;
var contribution = config.contribution || 100;
function scroll(dir, prevVal) {
list.scrollTop = list.scrollTop + dir;
if (list.scrollTop !== target && prevVal !== list.scrollTop) {
setTimeout(scroll.bind(null, dir, list.scrollTop), delay);
} else {
setTimeout(fn.bind(null, list.scrollTop), 100);
}
}
if (list.scrollTop < target) {
scroll(Math.abs(contribution), -1);
} else if (list.scrollTop > target) {
scroll(-Math.abs(contribution), -1);
}
}
function getFirstItemFromList(list) {
var listRect = list.getBoundingClientRect();
return document.elementFromPoint(listRect.left + 1, listRect.top + 1);
}
suite('mutations to items', function() {
var list, ajax, container;
setup(function() {
container = fixture('trivialList');
ajax = findElementInList(container, 'iron-ajax');
list = findElementInList(container, 'iron-list');
});
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,
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,
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();
});
});
});
</script>
</body>
</html>
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