281 lines
9.0 KiB
JavaScript
281 lines
9.0 KiB
JavaScript
/*
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Copyright 2016 OpenMarket Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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const React = require('react');
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const ReactDOM = require("react-dom");
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const ReactTestUtils = require('react-addons-test-utils');
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const expect = require('expect');
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import Promise from 'bluebird';
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const sdk = require('matrix-react-sdk');
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const ScrollPanel = sdk.getComponent('structures.ScrollPanel');
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const test_utils = require('test-utils');
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const Tester = React.createClass({
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getInitialState: function() {
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return {
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tileKeys: [],
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};
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},
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componentWillMount: function() {
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this.fillCounts = {'b': 0, 'f': 0};
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this._fillHandlers = {'b': null, 'f': null};
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this._fillDefers = {'b': null, 'f': null};
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this._scrollDefer = null;
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// scrollTop at the last scroll event
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this.lastScrollEvent = null;
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},
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_onFillRequest: function(back) {
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const dir = back ? 'b': 'f';
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console.log("FillRequest: " + dir);
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this.fillCounts[dir]++;
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const handler = this._fillHandlers[dir];
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const defer = this._fillDefers[dir];
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// don't use the same handler twice
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this._fillHandlers[dir] = null;
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this._fillDefers[dir] = null;
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let res;
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if (handler) {
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res = handler();
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} else {
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res = Promise.resolve(false);
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}
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if (defer) {
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defer.resolve();
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}
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return res;
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},
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addFillHandler: function(dir, handler) {
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this._fillHandlers[dir] = handler;
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},
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/* returns a promise which will resolve when the fill happens */
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awaitFill: function(dir) {
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console.log("ScrollPanel Tester: awaiting " + dir + " fill");
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const defer = Promise.defer();
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this._fillDefers[dir] = defer;
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return defer.promise;
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},
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_onScroll: function(ev) {
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const st = ev.target.scrollTop;
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console.log("ScrollPanel Tester: scroll event; scrollTop: " + st);
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this.lastScrollEvent = st;
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const d = this._scrollDefer;
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if (d) {
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this._scrollDefer = null;
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d.resolve();
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}
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},
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/* returns a promise which will resolve when a scroll event happens */
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awaitScroll: function() {
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console.log("Awaiting scroll");
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this._scrollDefer = Promise.defer();
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return this._scrollDefer.promise;
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},
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setTileKeys: function(keys) {
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console.log("Updating keys: len=" + keys.length);
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this.setState({tileKeys: keys.slice()});
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},
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scrollPanel: function() {
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return this.refs.sp;
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},
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_mkTile: function(key) {
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// each tile is 150 pixels high:
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// 98 pixels of body
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// 2 pixels of border
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// 50 pixels of margin
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//
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// there is an extra 50 pixels of margin at the bottom.
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return (
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<li key={key} data-scroll-tokens={key}>
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<div style={{height: '98px', margin: '50px', border: '1px solid black',
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backgroundColor: '#fff8dc' }}>
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{ key }
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</div>
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</li>
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);
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},
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render: function() {
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const tiles = this.state.tileKeys.map(this._mkTile);
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console.log("rendering with " + tiles.length + " tiles");
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return (
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<ScrollPanel ref="sp"
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onScroll={this._onScroll}
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onFillRequest={this._onFillRequest}>
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{ tiles }
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</ScrollPanel>
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);
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},
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});
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describe('ScrollPanel', function() {
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let parentDiv;
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let tester;
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let scrollingDiv;
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beforeEach(function(done) {
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test_utils.beforeEach(this);
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// create a div of a useful size to put our panel in, and attach it to
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// the document so that we can interact with it properly.
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parentDiv = document.createElement('div');
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parentDiv.style.width = '800px';
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parentDiv.style.height = '600px';
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parentDiv.style.overflow = 'hidden';
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document.body.appendChild(parentDiv);
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tester = ReactDOM.render(<Tester />, parentDiv);
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expect(tester.fillCounts.b).toEqual(1);
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expect(tester.fillCounts.f).toEqual(1);
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scrollingDiv = ReactTestUtils.findRenderedDOMComponentWithClass(
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tester, "gm-scroll-view");
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// we need to make sure we don't call done() until q has finished
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// running the completion handlers from the fill requests. We can't
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// just use .done(), because that will end up ahead of those handlers
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// in the queue. We can't use window.setTimeout(0), because that also might
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// run ahead of those handlers.
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const sp = tester.scrollPanel();
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let retriesRemaining = 1;
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const awaitReady = function() {
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return Promise.resolve().then(() => {
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if (sp._pendingFillRequests.b === false &&
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sp._pendingFillRequests.f === false
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) {
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return;
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}
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if (retriesRemaining == 0) {
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throw new Error("fillRequests did not complete");
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}
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retriesRemaining--;
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return awaitReady();
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});
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};
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awaitReady().done(done);
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});
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afterEach(function() {
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if (parentDiv) {
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document.body.removeChild(parentDiv);
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parentDiv = null;
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}
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});
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it('should handle scrollEvent strangeness', function() {
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const events = [];
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return Promise.resolve().then(() => {
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// initialise with a load of events
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for (let i = 0; i < 20; i++) {
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events.push(i+80);
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}
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tester.setTileKeys(events);
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expect(scrollingDiv.scrollHeight).toEqual(3050); // 20*150 + 50
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expect(scrollingDiv.scrollTop).toEqual(3050 - 600);
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return tester.awaitScroll();
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}).then(() => {
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expect(tester.lastScrollEvent).toBe(3050 - 600);
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tester.scrollPanel().scrollToToken("92", 0);
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// at this point, ScrollPanel will have updated scrollTop, but
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// the event hasn't fired.
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expect(tester.lastScrollEvent).toEqual(3050 - 600);
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expect(scrollingDiv.scrollTop).toEqual(1950);
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// now stamp over the scrollTop.
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console.log('faking #528');
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scrollingDiv.scrollTop = 500;
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return tester.awaitScroll();
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}).then(() => {
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expect(tester.lastScrollEvent).toBe(1950);
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expect(scrollingDiv.scrollTop).toEqual(1950);
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});
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});
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it('should not get stuck in #528 workaround', function(done) {
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let events = [];
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Promise.resolve().then(() => {
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// initialise with a bunch of events
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for (let i = 0; i < 40; i++) {
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events.push(i);
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}
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tester.setTileKeys(events);
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expect(tester.fillCounts.b).toEqual(1);
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expect(tester.fillCounts.f).toEqual(2);
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expect(scrollingDiv.scrollHeight).toEqual(6050); // 40*150 + 50
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expect(scrollingDiv.scrollTop).toEqual(6050 - 600);
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// try to scroll up, to a non-integer offset.
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tester.scrollPanel().scrollToToken("30", -101/3);
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expect(scrollingDiv.scrollTop).toEqual(4616); // 31*150 - 34
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// wait for the scroll event to land
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return tester.awaitScroll(); // fails
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}).then(() => {
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expect(tester.lastScrollEvent).toEqual(4616);
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// Now one more event; this will make it reset the scroll, but
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// because the delta will be less than 1, will not trigger a
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// scroll event, this leaving recentEventScroll defined.
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console.log("Adding event 50");
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events.push(50);
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tester.setTileKeys(events);
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// wait for the scrollpanel to stop trying to paginate
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}).then(() => {
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// Now, simulate hitting "scroll to bottom".
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events = [];
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for (let i = 100; i < 120; i++) {
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events.push(i);
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}
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tester.setTileKeys(events);
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tester.scrollPanel().scrollToBottom();
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// wait for the scroll event to land
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return tester.awaitScroll(); // fails
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}).then(() => {
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expect(scrollingDiv.scrollTop).toEqual(20*150 + 50 - 600);
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// simulate a user-initiated scroll on the div
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scrollingDiv.scrollTop = 1200;
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return tester.awaitScroll();
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}).then(() => {
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expect(scrollingDiv.scrollTop).toEqual(1200);
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}).done(done);
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});
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});
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