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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.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
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.txt
-->
<html>
<head>
<meta charset="UTF-8">
<title>iron-dropdown-scroll-manager tests</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="../iron-dropdown-scroll-manager.html">
<link rel="import" href="../../test-fixture/test-fixture.html">
<link rel="import" href="x-scrollable-element.html">
</head>
<body>
<test-fixture id="DOMSubtree">
<template>
<x-scrollable-element id="Parent"></x-scrollable-element>
</template>
</test-fixture>
<script>
suite('IronDropdownScrollManager', function() {
var parent;
var childOne;
var childTwo;
var grandChildOne;
var grandChildTwo;
var ancestor;
setup(function() {
parent = fixture('DOMSubtree');
childOne = parent.$$('#ChildOne');
childTwo = parent.$$('#ChildTwo');
grandChildOne = parent.$$('#GrandchildOne');
grandChildTwo = parent.$$('#GrandchildTwo');
ancestor = document.body;
});
suite('constraining scroll in the DOM', function() {
setup(function() {
Polymer.IronDropdownScrollManager.pushScrollLock(childOne);
});
teardown(function() {
Polymer.IronDropdownScrollManager.removeScrollLock(childOne);
});
test('recognizes sibling as locked', function() {
expect(Polymer.IronDropdownScrollManager.elementIsScrollLocked(childTwo))
.to.be.equal(true);
});
test('recognizes neice as locked', function() {
expect(Polymer.IronDropdownScrollManager.elementIsScrollLocked(grandChildTwo))
.to.be.equal(true);
});
test('recognizes parent as locked', function() {
expect(Polymer.IronDropdownScrollManager.elementIsScrollLocked(parent))
.to.be.equal(true);
});
test('recognizes ancestor as locked', function() {
expect(Polymer.IronDropdownScrollManager.elementIsScrollLocked(ancestor))
.to.be.equal(true);
});
test('recognizes locking child as unlocked', function() {
expect(Polymer.IronDropdownScrollManager.elementIsScrollLocked(childOne))
.to.be.equal(false);
});
test('recognizes descendant of locking child as unlocked', function() {
expect(Polymer.IronDropdownScrollManager.elementIsScrollLocked(grandChildOne))
.to.be.equal(false);
});
test('unlocks locked elements when there are no locking elements', function() {
Polymer.IronDropdownScrollManager.removeScrollLock(childOne);
expect(Polymer.IronDropdownScrollManager.elementIsScrollLocked(parent))
.to.be.equal(false);
});
suite('various scroll events', function() {
var scrollEvents;
var events;
setup(function() {
scrollEvents = [
'wheel',
'mousewheel',
'DOMMouseScroll',
'touchmove'
];
events = scrollEvents.map(function(scrollEvent) {
var event = new CustomEvent(scrollEvent, {
bubbles: true,
cancelable: true
});
event.deltaX = 0;
event.deltaY = 10;
return event;
});
});
test('prevents wheel events from locked elements', function() {
events.forEach(function(event) {
childTwo.dispatchEvent(event);
expect(event.defaultPrevented).to.be.eql(true);
});
});
test('allows wheel events when there are no locking elements', function() {
Polymer.IronDropdownScrollManager.removeScrollLock(childOne);
events.forEach(function(event) {
childTwo.dispatchEvent(event);
expect(event.defaultPrevented).to.be.eql(false);
});
});
test('allows wheel events from unlocked elements', function() {
events.forEach(function(event) {
childOne.dispatchEvent(event);
expect(event.defaultPrevented).to.be.eql(false);
});
});
test('touchstart is prevented if dispatched by an element outside the locking element', function() {
var event = new CustomEvent('touchstart', {
bubbles: true,
cancelable: true
});
childTwo.dispatchEvent(event);
expect(event.defaultPrevented).to.be.eql(true);
});
test('touchstart is not prevented if dispatched by an element inside the locking element', function() {
var event = new CustomEvent('touchstart', {
bubbles: true,
cancelable: true
});
grandChildOne.dispatchEvent(event);
expect(event.defaultPrevented).to.be.eql(false);
});
test('arrow keyboard events not prevented by manager', function() {
// Even if these events might cause scrolling, they should not be
// prevented because they might cause a11y issues (e.g. arrow keys
// used for navigating the content). iron-dropdown is capable of
// restoring the scroll position of the document if necessary.
var left = MockInteractions.keyboardEventFor('keydown', 37);
var up = MockInteractions.keyboardEventFor('keydown', 38);
var right = MockInteractions.keyboardEventFor('keydown', 39);
var down = MockInteractions.keyboardEventFor('keydown', 40);
grandChildOne.dispatchEvent(left);
grandChildOne.dispatchEvent(up);
grandChildOne.dispatchEvent(right);
grandChildOne.dispatchEvent(down);
expect(left.defaultPrevented).to.be.eql(false);
expect(up.defaultPrevented).to.be.eql(false);
expect(right.defaultPrevented).to.be.eql(false);
expect(down.defaultPrevented).to.be.eql(false);
});
});
});
});
</script>
</body>
</html>
|
