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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @suppress {checkTypes}
*
* @fileoverview
* Browser test for the scenario below:
* 1. Resize the client window to various sizes and verify the existence of
* horizontal and/or vertical scroll-bars.
* 2. TODO(jamiewalch): Connect to a host and toggle various combinations of
* scale and resize; repeat test 1.
* 3. TODO(jamiewalch): Disconnect; repeat test 1.
*/
'use strict';
/** @constructor */
browserTest.Scrollbars = function() {
this.scroller_ = document.getElementById('scroller');
this.SCROLLBAR_WIDTH_ = 16;
this.BORDER_WIDTH_ = 1;
// The top border is already accounted for by getBoundingClientRect, but
// the bottom border is not.
var marker = document.getElementById('bottom-marker');
this.CONTENT_HEIGHT_ =
marker.getBoundingClientRect().top + this.BORDER_WIDTH_;
// The width of the content is computed from the width of a <section> (690px)
// plus the margin of the "inset" class (20px). There's no easy way to get
// that without hard-coding it. In fact, this is a bit simplistic because
// the horizontal space required by the header depends on the length of the
// product name.
this.CONTENT_WIDTH_ = 690 + 20 + 2 * this.BORDER_WIDTH_;
};
browserTest.Scrollbars.prototype.run = function(data) {
if (!base.isAppsV2()) {
browserTest.fail(
'Scroll-bar testing requires resizing the app window, which can ' +
'only be done programmatically in apps v2.');
}
// Verify that scrollbars are added/removed correctly on the home screen.
this.verifyHomeScreenScrollbars_()
.then(browserTest.pass, browserTest.fail);
};
/**
* Verify the test cases for the home-screen.
*/
browserTest.Scrollbars.prototype.verifyHomeScreenScrollbars_ = function() {
// Note that, due to crbug.com/240772, if the window already has
// scroll-bars, they will not be removed if the window size is
// increased by less than the scroll-bar width. We work around that
// when connected to a host because we know how big the content is
// (in fact, testing this work-around is the main motivation for
// writing this test), but it's not worth it for the home screen,
// so make the window large not to require scrollbars before each test.
var tooWide = this.CONTENT_WIDTH_ + 100;
var tooTall = this.CONTENT_HEIGHT_ + 100;
var removeScrollbars = this.resize_.bind(this, tooWide, tooTall);
// Verify there are no scroll-bars if the window is as big as it needs
// to be.
return removeScrollbars()
.then(this.resizeAndVerifyScroll_(
this.CONTENT_WIDTH_,
this.CONTENT_HEIGHT_,
false, false))
// Verify there is a vertical scroll-bar if the window is shorter than it
// needs to be.
.then(removeScrollbars)
.then(this.resizeAndVerifyScroll_.bind(
this,
this.CONTENT_WIDTH_ + this.SCROLLBAR_WIDTH_,
this.CONTENT_HEIGHT_ - 1,
false, true))
// Verify there is a horizontal scroll-bar if the window is narrow than it
// needs to be.
.then(removeScrollbars)
.then(this.resizeAndVerifyScroll_.bind(
this,
this.CONTENT_WIDTH_ - 1,
this.CONTENT_HEIGHT_ + this.SCROLLBAR_WIDTH_,
true, false))
// Verify there are both horizontal and vertical scroll-bars, even if one
// is only needed as a result of the space occupied by the other.
.then(removeScrollbars)
.then(this.resizeAndVerifyScroll_.bind(
this,
this.CONTENT_WIDTH_,
this.CONTENT_HEIGHT_ - 1,
true, true))
.then(removeScrollbars)
.then(this.resizeAndVerifyScroll_.bind(
this,
this.CONTENT_WIDTH_ - 1,
this.CONTENT_HEIGHT_,
true, true))
// Verify there are both horizontal and vertical scroll-bars, if both are
// required independently.
.then(removeScrollbars)
.then(this.resizeAndVerifyScroll_.bind(
this,
this.CONTENT_WIDTH_ - 1,
this.CONTENT_HEIGHT_ - 1,
true, true));
};
/**
* Returns whether or not horizontal and vertical scroll-bars are expected
* and visible. To do this, it performs a hit-test close to the right and
* bottom edges of the scroller <div>; since the content of that <div> fills
* it completely, the hit-test will return the content unless there is a
* scroll-bar visible on the corresponding edge, in which case it will return
* the scroller <div> itself.
*
* @private
*/
browserTest.Scrollbars.prototype.getScrollbarState_ = function() {
var rect = this.scroller_.getBoundingClientRect();
var rightElement = document.elementFromPoint(
rect.right - 1, (rect.top + rect.bottom) / 2);
var bottomElement = document.elementFromPoint(
(rect.left + rect.right) / 2, rect.bottom - 1);
return {
horizontal: bottomElement === this.scroller_,
vertical: rightElement === this.scroller_
};
};
/**
* Returns a promise that resolves if the scroll-bar state is as expected, or
* rejects otherwise.
*
* @private
*/
browserTest.Scrollbars.prototype.verifyScrollbarState_ =
function(horizontalExpected, verticalExpected) {
var scrollbarState = this.getScrollbarState_();
if (scrollbarState.horizontal && !horizontalExpected) {
return Promise.reject(new Error(
'Horizontal scrollbar present but not expected.'));
} else if (!scrollbarState.horizontal && horizontalExpected) {
return Promise.reject(new Error(
'Horizontal scrollbar expected but not present.'));
} else if (scrollbarState.vertical && !verticalExpected) {
return Promise.reject(new Error(
'Vertical scrollbar present but not expected.'));
} else if (!scrollbarState.vertical && verticalExpected) {
return Promise.reject(new Error(
'Vertical scrollbar expected but not present.'));
}
return Promise.resolve();
};
/**
* @private
* @return {Promise} A promise that will be fulfilled when the window has
* been resized and it's safe to test scroll-bar visibility.
*/
browserTest.Scrollbars.prototype.resize_ = function(width, height) {
var win = chrome.app.window.current();
win.resizeTo(width, height);
// Chrome takes a while to update the scroll-bars, so don't resolve
// immediately. Waiting for the onBoundsChanged event would be cleaner,
// but isn't reliable.
return base.Promise.sleep(500);
};
/**
* @private
* @return {Promise} A promise that will be fulfilled when the window has
* been resized and it's safe to test scroll-bar visibility.
*/
browserTest.Scrollbars.prototype.resizeAndVerifyScroll_ =
function(width, height, horizontalExpected, verticalExpected) {
return this.resize_(width, height).then(
this.verifyScrollbarState_.bind(
this, horizontalExpected, verticalExpected));
};
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