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test-viewport.js
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test-viewport.js
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/**
* Copyright 2015 The AMP HTML Authors. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import {AmpDocSingle, installDocService} from '../../src/service/ampdoc-impl';
import {
installViewportServiceForDoc,
Viewport,
ViewportBindingDef,
ViewportBindingIosEmbedWrapper_,
ViewportBindingNatural_,
ViewportBindingNaturalIosEmbed_,
parseViewportMeta,
stringifyViewportMeta,
updateViewportMetaString,
} from '../../src/service/viewport-impl';
import {getStyle} from '../../src/style';
import {installPlatformService} from '../../src/service/platform-impl';
import {installTimerService} from '../../src/service/timer-impl';
import {installViewerServiceForDoc} from '../../src/service/viewer-impl';
import {loadPromise} from '../../src/event-helper';
import {setParentWindow} from '../../src/service';
import {toggleExperiment} from '../../src/experiments';
import {vsyncFor} from '../../src/vsync';
import * as sinon from 'sinon';
describe('Viewport', () => {
let sandbox;
let clock;
let viewport;
let binding;
let viewer;
let viewerMock;
let windowApi;
let ampdoc;
let viewerViewportHandler;
let updatedPaddingTop;
let viewportSize;
let vsyncTasks;
beforeEach(() => {
sandbox = sinon.sandbox.create();
clock = sandbox.useFakeTimers();
viewerViewportHandler = undefined;
viewer = {
isEmbedded: () => false,
getPaddingTop: () => 19,
onViewportEvent: handler => {
viewerViewportHandler = handler;
},
requestFullOverlay: () => {},
cancelFullOverlay: () => {},
postScroll: sandbox.spy(),
isVisible: () => true,
onVisibilityChanged: () => {},
};
viewerMock = sandbox.mock(viewer);
windowApi = {
document: {
documentElement: {
nodeType: 1,
style: {},
classList: {
add: function() {},
},
},
},
location: {},
navigator: window.navigator,
setTimeout: window.setTimeout,
clearTimeout: window.clearTimeout,
requestAnimationFrame: fn => window.setTimeout(fn, 16),
};
const ampdocService = installDocService(windowApi, /* isSingleDoc */ true);
ampdoc = ampdocService.getAmpDoc();
installTimerService(windowApi);
installPlatformService(windowApi);
installViewerServiceForDoc(ampdoc);
binding = new ViewportBindingDef();
viewportSize = {width: 111, height: 222};
binding.getSize = () => {
return {width: viewportSize.width, height: viewportSize.height};
};
binding.getScrollTop = () => 17;
binding.getScrollLeft = () => 0;
binding.connect = sandbox.spy();
binding.disconnect = sandbox.spy();
updatedPaddingTop = undefined;
binding.updatePaddingTop = paddingTop => updatedPaddingTop = paddingTop;
viewport = new Viewport(ampdoc, binding, viewer);
viewport.fixedLayer_ = {
update: () => {
return {then: callback => callback()};
},
updatePaddingTop: () => {},
};
viewport.getSize();
// Use window since Animation by default will use window.
const vsync = vsyncFor(window);
vsyncTasks = [];
sandbox.stub(vsync, 'canAnimate').returns(true);
sandbox.stub(vsync, 'createAnimTask', (unusedContextNode, task) => {
return () => {
vsyncTasks.push(task);
};
});
});
afterEach(() => {
expect(vsyncTasks.length).to.equal(0);
viewerMock.verify();
sandbox.restore();
});
function runVsync() {
const tasks = vsyncTasks.slice(0);
vsyncTasks = [];
tasks.forEach(function(task) {
const state = {};
if (task.measure) {
task.measure(state);
}
task.mutate(state);
});
}
it('should connect binding right away when visible', () => {
expect(binding.connect).to.be.calledOnce;
expect(binding.disconnect).to.not.be.called;
});
it('should disconnect binding on dispose', () => {
viewport.dispose();
expect(binding.disconnect).to.be.calledOnce;
});
it('should connect binding later when visibility changes', () => {
binding.connect = sandbox.spy();
binding.disconnect = sandbox.spy();
viewer.isVisible = () => false;
let onVisibilityHandler;
viewer.onVisibilityChanged = handler => onVisibilityHandler = handler;
viewport = new Viewport(ampdoc, binding, viewer);
// Hasn't been called at first.
expect(binding.connect).to.not.be.called;
expect(binding.disconnect).to.not.be.called;
// When becomes visible - it gets called.
viewer.isVisible = () => true;
onVisibilityHandler();
expect(binding.connect).to.be.calledOnce;
expect(binding.disconnect).to.not.be.called;
// Repeat visibility calls do not affect anything.
onVisibilityHandler();
expect(binding.connect).to.be.calledOnce;
expect(binding.disconnect).to.not.be.called;
// When becomes invisible - it gets disconnected.
viewer.isVisible = () => false;
onVisibilityHandler();
expect(binding.connect).to.be.calledOnce;
expect(binding.disconnect).to.be.calledOnce;
});
it('should pass through size and scroll', () => {
expect(viewport.getPaddingTop()).to.equal(19);
expect(updatedPaddingTop).to.equal(19);
expect(viewport.getSize().width).to.equal(111);
expect(viewport.getSize().height).to.equal(222);
expect(viewport.getTop()).to.equal(17);
expect(viewport.getRect().left).to.equal(0);
expect(viewport.getRect().top).to.equal(17);
expect(viewport.getRect().width).to.equal(111);
expect(viewport.getRect().height).to.equal(222);
});
it('should cache result for getRect()', () => {
assert.strictEqual(viewport.getRect(), viewport.getRect());
});
it('should invalidate getRect() cache after scroll', () => {
expect(viewport.getRect().top).to.equal(17);
// Scroll vertically.
binding.getScrollTop = () => 44;
viewport.scroll_();
expect(viewport.getRect().top).to.equal(44);
});
it('should invalidate getRect() cache after resize', () => {
expect(viewport.getRect().width).to.equal(111);
// Resize horizontally.
viewportSize.width = 112;
viewport.resize_();
expect(viewport.getRect().width).to.equal(112);
});
it('should not relayout on height resize', () => {
let changeEvent = null;
viewport.onChanged(event => {
changeEvent = event;
});
viewportSize.height = 223;
viewport.resize_();
expect(changeEvent).to.not.equal(null);
expect(changeEvent.relayoutAll).to.equal(false);
expect(changeEvent.velocity).to.equal(0);
});
it('should relayout on width resize', () => {
let changeEvent = null;
viewport.onChanged(event => {
changeEvent = event;
});
viewportSize.width = 112;
viewport.resize_();
expect(changeEvent).to.not.equal(null);
expect(changeEvent.relayoutAll).to.equal(true);
expect(changeEvent.velocity).to.equal(0);
});
it('should defer change event until fixed layer is complete', () => {
let changeEvent = null;
viewport.onChanged(event => {
changeEvent = event;
});
let fixedResolver;
const fixedPromise = new Promise(resolve => fixedResolver = resolve);
viewport.fixedLayer_ = {update: () => fixedPromise};
viewportSize.width = 112;
viewport.resize_();
expect(changeEvent).to.be.null;
fixedResolver();
return fixedPromise.then(() => {
expect(changeEvent).to.not.be.null;
});
});
it('should not do anything if padding is not changed', () => {
const bindingMock = sandbox.mock(binding);
viewerViewportHandler({paddingTop: 19});
bindingMock.verify();
});
it('should update non-transient padding', () => {
const bindingMock = sandbox.mock(binding);
const fixedLayerMock = sandbox.mock(viewport.fixedLayer_);
fixedLayerMock.expects('updatePaddingTop')
.withExactArgs(/* paddingTop */ 0, /* transient */ undefined)
.once();
viewerViewportHandler({paddingTop: 0});
bindingMock.verify();
fixedLayerMock.verify();
});
it('should update padding when viewer wants to hide header', () => {
const bindingMock = sandbox.mock(binding);
const fixedLayerMock = sandbox.mock(viewport.fixedLayer_);
fixedLayerMock.expects('updatePaddingTop')
.withExactArgs(/* paddingTop */ 0, /* transient */ true)
.once();
bindingMock.expects('hideViewerHeader').withArgs(true, 19).once();
viewerViewportHandler({paddingTop: 0, duation: 300, curve: 'ease-in',
transient: true});
bindingMock.verify();
fixedLayerMock.verify();
});
it('should update padding for fixed layer when viewer wants to ' +
'hide header', () => {
viewport.fixedLayer_ = {updatePaddingTop: () => {}};
const fixedLayerMock = sandbox.mock(viewport.fixedLayer_);
fixedLayerMock.expects('updatePaddingTop').withArgs(0).once();
viewerViewportHandler({paddingTop: 0, duation: 300, curve: 'ease-in',
transient: 'true'});
fixedLayerMock.verify();
});
it('should update viewport when entering lightbox mode', () => {
viewport.vsync_ = {mutate: callback => callback()};
viewerMock.expects('requestFullOverlay').once();
const disableTouchZoomStub = sandbox.stub(viewport, 'disableTouchZoom');
const hideFixedLayerStub = sandbox.stub(viewport, 'hideFixedLayer');
const bindingMock = sandbox.mock(binding);
bindingMock.expects('updateLightboxMode').withArgs(true).once();
viewport.enterLightboxMode();
bindingMock.verify();
expect(disableTouchZoomStub.callCount).to.equal(1);
expect(hideFixedLayerStub.callCount).to.equal(1);
});
it('should update viewport when leaving lightbox mode', () => {
viewport.vsync_ = {mutate: callback => callback()};
viewerMock.expects('cancelFullOverlay').once();
const restoreOriginalTouchZoomStub = sandbox.stub(viewport,
'restoreOriginalTouchZoom');
const showFixedLayerStub = sandbox.stub(viewport, 'showFixedLayer');
const bindingMock = sandbox.mock(binding);
bindingMock.expects('updateLightboxMode').withArgs(false).once();
viewport.leaveLightboxMode();
bindingMock.verify();
expect(restoreOriginalTouchZoomStub.callCount).to.equal(1);
expect(showFixedLayerStub.callCount).to.equal(1);
});
it('should send scroll events', () => {
// 0 -> 6 -> 12 -> 16 -> 18
// scroll-10 scroll-20 scroll-30 2nd anim frame scroll-40
// when there's no scroll
expect(viewport.scrollAnimationFrameThrottled_).to.be.false;
expect(viewer.postScroll.callCount).to.equal(0);
// scroll to 10
viewport.getScrollTop = () => 10;
viewport.sendScrollMessage_();
expect(viewport.scrollAnimationFrameThrottled_).to.be.true;
expect(viewer.postScroll.callCount).to.equal(0);
// 6 ticks later, still during first animation frame
clock.tick(6);
expect(viewport.scrollAnimationFrameThrottled_).to.be.true;
// scroll to 20
viewport.getScrollTop = () => 20;
viewport.sendScrollMessage_();
expect(viewport.scrollAnimationFrameThrottled_).to.be.true;
expect(viewer.postScroll.callCount).to.equal(0);
// 6 ticks later, still during first animation frame
clock.tick(6);
expect(viewport.scrollAnimationFrameThrottled_).to.be.true;
// scroll to 30
viewport.getScrollTop = () => 30;
viewport.sendScrollMessage_();
expect(viewport.scrollAnimationFrameThrottled_).to.be.true;
expect(viewer.postScroll.callCount).to.equal(0);
// 6 ticks later, second animation frame starts
clock.tick(6);
expect(viewport.scrollAnimationFrameThrottled_).to.be.false;
expect(viewer.postScroll.callCount).to.equal(1);
expect(viewer.postScroll.withArgs(30).calledOnce).to.be.true;
// scroll to 40
viewport.getScrollTop = () => 40;
viewport.sendScrollMessage_();
expect(viewport.scrollAnimationFrameThrottled_).to.be.true;
expect(viewer.postScroll.callCount).to.equal(1);
});
it('should defer scroll events', () => {
let changeEvent = null;
let eventCount = 0;
viewport.onChanged(event => {
changeEvent = event;
eventCount++;
});
// when there's no scroll
expect(viewport.scrollTracking_).to.be.false;
// expect(changeEvent).to.equal(null);
expect(viewer.postScroll.callCount).to.equal(0);
// time 0: scroll to 34
// raf for viewer.postScroll, delay 36 ticks till raf for throttledScroll_
binding.getScrollTop = () => 34;
viewport.scroll_();
expect(viewport.scrollTracking_).to.be.true;
viewport.scroll_();
viewport.scroll_();
expect(changeEvent).to.equal(null);
expect(viewport.scrollTracking_).to.be.true;
clock.tick(8);
expect(changeEvent).to.equal(null);
clock.tick(8);
// time 16: scroll to 35
// call viewer.postScroll, raf for viewer.postScroll
expect(changeEvent).to.equal(null);
expect(viewer.postScroll.callCount).to.equal(1);
binding.getScrollTop = () => 35;
viewport.scroll_();
clock.tick(16);
// time 32: scroll to 35
// call viewer.postScroll, raf for viewer.postScroll
viewport.scroll_();
expect(changeEvent).to.equal(null);
expect(viewport.scrollTracking_).to.be.true;
expect(viewer.postScroll.callCount).to.equal(2);
// time 36:
// raf for throttledScroll_
clock.tick(16);
// time 48: scroll to 35
// call viewer.postScroll, call throttledScroll_
// raf for viewer.postScroll
// delay 36 ticks till raf for throttledScroll_
expect(viewport.scrollTracking_).to.be.false;
viewport.scroll_();
expect(changeEvent).to.not.equal(null);
expect(changeEvent.relayoutAll).to.equal(false);
expect(changeEvent.velocity).to.be.closeTo(0.020833, 1e-4);
expect(eventCount).to.equal(1);
expect(viewport.scrollTracking_).to.be.true;
expect(viewer.postScroll.callCount).to.equal(3);
changeEvent = null;
clock.tick(16);
// time 64:
// call viewer.postScroll
expect(viewer.postScroll.callCount).to.equal(4);
clock.tick(20);
// time 84:
// raf for throttledScroll_
clock.tick(16);
// time 100:
// call throttledScroll_
expect(changeEvent).to.not.equal(null);
expect(changeEvent.relayoutAll).to.equal(false);
expect(viewport.scrollTracking_).to.be.false;
expect(changeEvent.velocity).to.be.equal(0);
expect(eventCount).to.equal(2);
});
it('should update scroll pos and reset cache', () => {
const bindingMock = sandbox.mock(binding);
bindingMock.expects('setScrollTop').withArgs(117).once();
viewport.setScrollTop(117);
expect(viewport./*OK*/scrollTop_).to.be.null;
});
it('should change scrollTop for scrollIntoView and respect padding', () => {
const element = document.createElement('div');
const bindingMock = sandbox.mock(binding);
bindingMock.expects('getLayoutRect').withArgs(element)
.returns({top: 111}).once();
bindingMock.expects('setScrollTop').withArgs(111 - /* padding */ 19).once();
viewport.scrollIntoView(element);
bindingMock.verify();
});
it('should change scrollTop for animateScrollIntoView and respect ' +
'padding', () => {
const element = document.createElement('div');
const bindingMock = sandbox.mock(binding);
bindingMock.expects('getLayoutRect').withArgs(element)
.returns({top: 111}).once();
bindingMock.expects('setScrollTop').withArgs(111 - /* padding */ 19).once();
const duration = 1000;
const promise = viewport.animateScrollIntoView(element, 1000).then(() => {
bindingMock.verify();
});
clock.tick(duration);
runVsync();
return promise;
});
it('should not change scrollTop for animateScrollIntoView', () => {
const element = document.createElement('div');
const bindingMock = sandbox.mock(binding);
bindingMock.expects('getLayoutRect').withArgs(element)
.returns({top: 111}).once();
viewport.paddingTop_ = 0;
sandbox.stub(viewport, 'getScrollTop').returns(111);
bindingMock.expects('setScrollTop').withArgs(111).never();
const duration = 1000;
const promise = viewport.animateScrollIntoView(element, 1000).then(() => {
bindingMock.verify();
});
clock.tick(duration);
runVsync();
return promise;
});
it('should send cached scroll pos to getLayoutRect', () => {
const element = document.createElement('div');
const bindingMock = sandbox.mock(binding);
viewport.scrollTop_ = 111;
viewport.scrollLeft_ = 222;
bindingMock.expects('getLayoutRect').withArgs(element, 222, 111)
.returns('sentinel').once();
expect(viewport.getLayoutRect(element)).to.equal('sentinel');
});
it('should deletegate scrollWidth', () => {
const bindingMock = sandbox.mock(binding);
bindingMock.expects('getScrollWidth').withArgs().returns(111).once();
expect(viewport.getScrollWidth()).to.equal(111);
});
it('should deletegate scrollHeight', () => {
const bindingMock = sandbox.mock(binding);
bindingMock.expects('getScrollHeight').withArgs().returns(117).once();
expect(viewport.getScrollHeight()).to.equal(117);
});
it('should not set pan-y w/o experiment', () => {
// TODO(dvoytenko, #4894): Cleanup the experiment.
viewer.isEmbedded = () => true;
toggleExperiment(windowApi, 'pan-y', false);
viewport = new Viewport(ampdoc, binding, viewer);
expect(windowApi.document.documentElement.style['touch-action'])
.to.not.exist;
});
it('should not set pan-y when not embedded', () => {
// TODO(dvoytenko, #4894): Cleanup the experiment.
viewer.isEmbedded = () => false;
toggleExperiment(windowApi, 'pan-y', true);
viewport = new Viewport(ampdoc, binding, viewer);
expect(windowApi.document.documentElement.style['touch-action'])
.to.not.exist;
});
it('should set pan-y with experiment', () => {
// TODO(dvoytenko, #4894): Cleanup the experiment.
viewer.isEmbedded = () => true;
toggleExperiment(windowApi, 'pan-y', true);
viewport = new Viewport(ampdoc, binding, viewer);
expect(windowApi.document.documentElement.style['touch-action'])
.to.equal('pan-y');
});
it('should add class to HTML element with make-body-block experiment', () => {
viewer.isEmbedded = () => true;
toggleExperiment(windowApi, 'make-body-block', true);
const docElement = windowApi.document.documentElement;
const addStub = sandbox.stub(docElement.classList, 'add');
viewport = new Viewport(ampdoc, binding, viewer);
expect(addStub).to.be.calledWith('-amp-make-body-block');
});
describe('for child window', () => {
let viewport;
let bindingMock;
let iframe;
let iframeWin;
let ampdoc;
beforeEach(() => {
ampdoc = new AmpDocSingle(window);
viewport = new Viewport(ampdoc, binding, viewer);
bindingMock = sandbox.mock(binding);
iframe = document.createElement('iframe');
const html = '<div id="one"></div>';
let promise;
if ('srcdoc' in iframe) {
iframe.srcdoc = html;
promise = loadPromise(iframe);
document.body.appendChild(iframe);
} else {
iframe.src = 'about:blank';
document.body.appendChild(iframe);
const childDoc = iframe.contentWindow.document;
childDoc.open();
childDoc.write(html);
childDoc.close();
promise = Promise.resolve();
}
return promise.then(() => {
iframeWin = iframe.contentWindow;
setParentWindow(iframeWin, window);
});
});
afterEach(() => {
if (iframe.parentElement) {
iframe.parentElement.removeChild(iframe);
}
bindingMock.verify();
});
it('should calculate child window element rect via parent', () => {
viewport.scrollLeft_ = 0;
viewport.scrollTop_ = 0;
const element = iframeWin.document.createElement('div');
iframeWin.document.body.appendChild(element);
bindingMock.expects('getLayoutRect')
.withExactArgs(element, 0, 0)
.returns({left: 20, top: 10}).once();
bindingMock.expects('getLayoutRect')
.withExactArgs(iframe, 0, 0)
.returns({left: 211, top: 111}).once();
const rect = viewport.getLayoutRect(element);
expect(rect.left).to.equal(211 + 20);
expect(rect.top).to.equal(111 + 10);
});
it('should offset child window element with parent scroll pos', () => {
viewport.scrollLeft_ = 200;
viewport.scrollTop_ = 100;
const element = iframeWin.document.createElement('div');
iframeWin.document.body.appendChild(element);
bindingMock.expects('getLayoutRect')
.withExactArgs(element, 0, 0)
.returns({left: 20, top: 10}).once();
bindingMock.expects('getLayoutRect')
.withExactArgs(iframe, 200, 100)
.returns({left: 211, top: 111}).once();
const rect = viewport.getLayoutRect(element);
expect(rect.left).to.equal(211 + 20);
expect(rect.top).to.equal(111 + 10);
});
});
});
describe('Viewport META', () => {
describe('parseViewportMeta', () => {
it('should accept null or empty strings', () => {
expect(parseViewportMeta(null)).to.be.empty;
});
it('should parse single key-value', () => {
expect(parseViewportMeta('width=device-width')).to.deep.equal({
'width': 'device-width',
});
});
it('should parse two key-values', () => {
expect(parseViewportMeta('width=device-width,minimum-scale=1')).to.deep
.equal({
'width': 'device-width',
'minimum-scale': '1',
});
});
it('should parse empty value', () => {
expect(parseViewportMeta('width=device-width,minimal-ui')).to.deep.equal({
'width': 'device-width',
'minimal-ui': '',
});
expect(parseViewportMeta('minimal-ui,width=device-width')).to.deep.equal({
'width': 'device-width',
'minimal-ui': '',
});
});
it('should return last dupe', () => {
expect(parseViewportMeta('width=100,width=200')).to.deep.equal({
'width': '200',
});
});
it('should ignore extra delims', () => {
expect(parseViewportMeta(',,,width=device-width,,,,minimum-scale=1,,,'))
.to.deep.equal({
'width': 'device-width',
'minimum-scale': '1',
});
});
it('should support semicolon', () => {
expect(parseViewportMeta('width=device-width;minimum-scale=1'))
.to.deep.equal({
'width': 'device-width',
'minimum-scale': '1',
});
});
it('should support mix of comma and semicolon', () => {
expect(parseViewportMeta('width=device-width,minimum-scale=1;test=3;'))
.to.deep.equal({
'width': 'device-width',
'minimum-scale': '1',
'test': '3',
});
});
it('should ignore extra mix delims', () => {
expect(parseViewportMeta(',,;;,width=device-width;;,minimum-scale=1,,;'))
.to.deep.equal({
'width': 'device-width',
'minimum-scale': '1',
});
});
});
describe('stringifyViewportMeta', () => {
it('should stringify empty', () => {
expect(stringifyViewportMeta({})).to.equal('');
});
it('should stringify single key-value', () => {
expect(stringifyViewportMeta({'width': 'device-width'}))
.to.equal('width=device-width');
});
it('should stringify two key-values', () => {
const res = stringifyViewportMeta({
'width': 'device-width',
'minimum-scale': '1',
});
expect(res == 'width=device-width,minimum-scale=1' ||
res == 'minimum-scale=1,width=device-width')
.to.be.true;
});
it('should stringify empty values', () => {
const res = stringifyViewportMeta({
'width': 'device-width',
'minimal-ui': '',
});
expect(res == 'width=device-width,minimal-ui' ||
res == 'minimal-ui,width=device-width')
.to.be.true;
});
});
describe('updateViewportMetaString', () => {
it('should do nothing with empty values', () => {
expect(updateViewportMetaString(
'', {})).to.equal('');
expect(updateViewportMetaString(
'width=device-width', {})).to.equal('width=device-width');
});
it('should add a new value', () => {
expect(updateViewportMetaString(
'', {'minimum-scale': '1'})).to.equal('minimum-scale=1');
expect(parseViewportMeta(updateViewportMetaString(
'width=device-width', {'minimum-scale': '1'})))
.to.deep.equal({
'width': 'device-width',
'minimum-scale': '1',
});
});
it('should replace the existing value', () => {
expect(parseViewportMeta(updateViewportMetaString(
'width=device-width,minimum-scale=2', {'minimum-scale': '1'})))
.to.deep.equal({
'width': 'device-width',
'minimum-scale': '1',
});
});
it('should delete the existing value', () => {
expect(parseViewportMeta(updateViewportMetaString(
'width=device-width,minimum-scale=1', {'minimum-scale': undefined})))
.to.deep.equal({
'width': 'device-width',
});
});
it('should ignore delete for a non-existing value', () => {
expect(parseViewportMeta(updateViewportMetaString(
'width=device-width', {'minimum-scale': undefined})))
.to.deep.equal({
'width': 'device-width',
});
});
it('should do nothing if values did not change', () => {
expect(updateViewportMetaString(
'width=device-width,minimum-scale=1', {'minimum-scale': '1'}))
.to.equal('width=device-width,minimum-scale=1');
});
});
describe('TouchZoom', () => {
let sandbox;
let clock;
let viewport;
let binding;
let viewer;
let viewerMock;
let windowApi;
let ampdoc;
let originalViewportMetaString, viewportMetaString;
let viewportMeta;
let viewportMetaSetter;
beforeEach(() => {
sandbox = sinon.sandbox.create();
clock = sandbox.useFakeTimers();
viewer = {
isEmbedded: () => false,
getPaddingTop: () => 0,
onViewportEvent: () => {},
isIframed: () => false,
isVisible: () => true,
onVisibilityChanged: () => {},
};
viewerMock = sandbox.mock(viewer);
originalViewportMetaString = 'width=device-width,minimum-scale=1';
viewportMetaString = originalViewportMetaString;
viewportMeta = Object.create(null);
viewportMetaSetter = sandbox.spy();
Object.defineProperty(viewportMeta, 'content', {
get: () => viewportMetaString,
set: value => {
viewportMetaSetter(value);
viewportMetaString = value;
},
});
windowApi = {
document: {
documentElement: {
style: {},
classList: {
add: function() {},
},
},
querySelector: selector => {
if (selector == 'meta[name=viewport]') {
return viewportMeta;
}
return undefined;
},
},
navigator: window.navigator,
setTimeout: window.setTimeout,
clearTimeout: window.clearTimeout,
location: {},
};
const ampdocService = installDocService(windowApi,
/* isSingleDoc */ true);
ampdoc = ampdocService.getAmpDoc();
installTimerService(windowApi);
installPlatformService(windowApi);
installViewerServiceForDoc(ampdoc);
binding = new ViewportBindingDef();
viewport = new Viewport(ampdoc, binding, viewer);
});
afterEach(() => {
sandbox.restore();
});
it('should initialize original viewport meta', () => {
viewport.getViewportMeta_();
expect(viewport.originalViewportMetaString_).to.equal(viewportMetaString);
expect(viewportMetaSetter.callCount).to.equal(0);
});
it('should disable TouchZoom', () => {
viewport.disableTouchZoom();
expect(viewportMetaSetter.callCount).to.equal(1);
expect(viewportMetaString).to.have.string('maximum-scale=1');
expect(viewportMetaString).to.have.string('user-scalable=no');
});
it('should ignore disable TouchZoom if already disabled', () => {
viewportMetaString = 'width=device-width,minimum-scale=1,' +
'maximum-scale=1,user-scalable=no';
viewport.disableTouchZoom();
expect(viewportMetaSetter.callCount).to.equal(0);
});
it('should ignore disable TouchZoom if embedded', () => {
viewerMock.expects('isIframed').returns(true).atLeast(1);
viewport.disableTouchZoom();
expect(viewportMetaSetter.callCount).to.equal(0);
});
it('should restore TouchZoom', () => {
viewport.disableTouchZoom();
expect(viewportMetaSetter.callCount).to.equal(1);
expect(viewportMetaString).to.have.string('maximum-scale=1');
expect(viewportMetaString).to.have.string('user-scalable=no');
viewport.restoreOriginalTouchZoom();
expect(viewportMetaSetter.callCount).to.equal(2);
expect(viewportMetaString).to.equal(originalViewportMetaString);
});
it('should reset TouchZoom; zooming state unknown', () => {
viewport.resetTouchZoom();
expect(viewportMetaSetter.callCount).to.equal(1);
expect(viewportMetaString).to.have.string('maximum-scale=1');
expect(viewportMetaString).to.have.string('user-scalable=no');
clock.tick(1000);
expect(viewportMetaSetter.callCount).to.equal(2);
expect(viewportMetaString).to.equal(originalViewportMetaString);
});
it('should ignore reset TouchZoom if not currently zoomed', () => {
windowApi.document.documentElement.clientHeight = 500;
windowApi.innerHeight = 500;
viewport.resetTouchZoom();
expect(viewportMetaSetter.callCount).to.equal(0);
});
it('should proceed with reset TouchZoom if currently zoomed', () => {
windowApi.document.documentElement.clientHeight = 500;
windowApi.innerHeight = 300;
viewport.resetTouchZoom();
expect(viewportMetaSetter.callCount).to.equal(1);
});
it('should ignore reset TouchZoom if embedded', () => {
viewerMock.expects('isIframed').returns(true).atLeast(1);
viewport.resetTouchZoom();
expect(viewportMetaSetter.callCount).to.equal(0);
});
});
});
describe('ViewportBindingNatural', () => {
let sandbox;
let windowMock;
let binding;
let windowApi;
let documentElement;
let documentBody;
let windowEventHandlers;
let viewer;
let viewerMock;
beforeEach(() => {
sandbox = sinon.sandbox.create();
const WindowApi = function() {};
windowEventHandlers = {};
WindowApi.prototype.addEventListener = function(eventType, handler) {
windowEventHandlers[eventType] = handler;
};
WindowApi.prototype.removeEventListener = function(eventType, handler) {
if (windowEventHandlers[eventType] == handler) {
delete windowEventHandlers[eventType];
}
};
windowApi = new WindowApi();
documentElement = {
style: {},
};
documentBody = {
style: {},
};
windowApi.document = {
documentElement,
body: documentBody,
defaultView: windowApi,
};
windowApi.navigator = {userAgent: ''};
windowMock = sandbox.mock(windowApi);
installPlatformService(windowApi);
viewer = {
isEmbedded: () => false,
getPaddingTop: () => 19,
onViewportEvent: () => {},
requestFullOverlay: () => {},
cancelFullOverlay: () => {},
postScroll: sandbox.spy(),
};
viewerMock = sandbox.mock(viewer);
binding = new ViewportBindingNatural_(windowApi, viewer);
binding.connect();
});
afterEach(() => {
windowMock.verify();
viewerMock.verify();
sandbox.restore();
toggleExperiment(windowApi, 'make-body-relative', false);
});
it('should configure make-body-relative', () => {
toggleExperiment(windowApi, 'make-body-relative', true);
binding = new ViewportBindingNatural_(windowApi, viewer);
expect(documentBody.style.display).to.equal('block');
expect(documentBody.style.position).to.equal('relative');
expect(documentBody.style.overflowY).to.equal('visible');
expect(documentBody.style.overflowX).to.equal('hidden');
});
it('should setup overflow:visible on body', () => {
expect(documentBody.style.overflow).to.equal('visible');
});
it('should NOT require fixed layer transferring', () => {
expect(binding.requiresFixedLayerTransfer()).to.be.false;
});
it('should subscribe to scroll and resize events', () => {
expect(windowEventHandlers['scroll']).to.not.equal(undefined);
expect(windowEventHandlers['resize']).to.not.equal(undefined);
});
it('should connect/disconnect events', () => {
windowEventHandlers = {};
binding = new ViewportBindingNatural_(windowApi, viewer);
expect(Object.keys(windowEventHandlers)).to.have.length(0);
binding.connect();
expect(windowEventHandlers['scroll']).to.not.equal(undefined);
expect(windowEventHandlers['resize']).to.not.equal(undefined);
// After disconnect, there are no more listeners on window.
binding.disconnect();