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270 lines
9.7 KiB
Dart
270 lines
9.7 KiB
Dart
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:async';
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import 'package:flutter_web_test/flutter_web_test.dart';
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import 'package:flutter_web/widgets.dart';
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Widget _buildScroller({List<String> log}) {
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return new NotificationListener<ScrollNotification>(
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onNotification: (ScrollNotification notification) {
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if (notification is ScrollStartNotification) {
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log.add('scroll-start');
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} else if (notification is ScrollUpdateNotification) {
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log.add('scroll-update');
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} else if (notification is ScrollEndNotification) {
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log.add('scroll-end');
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}
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return false;
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},
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child: new SingleChildScrollView(
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child: new Container(width: 1000.0, height: 1000.0),
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),
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);
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}
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void main() {
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Completer<Null> animateTo(WidgetTester tester, double newScrollOffset,
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{@required Duration duration}) {
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final Completer<Null> completer = new Completer<Null>();
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final ScrollableState scrollable = tester.state(find.byType(Scrollable));
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scrollable.position
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.animateTo(newScrollOffset, duration: duration, curve: Curves.linear)
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.whenComplete(completer.complete);
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return completer;
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}
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void jumpTo(WidgetTester tester, double newScrollOffset) {
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final ScrollableState scrollable = tester.state(find.byType(Scrollable));
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scrollable.position.jumpTo(newScrollOffset);
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}
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testWidgets('Scroll event drag', (WidgetTester tester) async {
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final List<String> log = <String>[];
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await tester.pumpWidget(_buildScroller(log: log));
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expect(log, equals(<String>[]));
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final TestGesture gesture =
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await tester.startGesture(const Offset(100.0, 100.0));
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expect(log, equals(<String>['scroll-start']));
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await tester.pump(const Duration(seconds: 1));
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expect(log, equals(<String>['scroll-start']));
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await gesture.moveBy(const Offset(-10.0, -10.0));
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expect(log, equals(<String>['scroll-start', 'scroll-update']));
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await tester.pump(const Duration(seconds: 1));
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expect(log, equals(<String>['scroll-start', 'scroll-update']));
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await gesture.up();
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expect(
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log, equals(<String>['scroll-start', 'scroll-update', 'scroll-end']));
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await tester.pump(const Duration(seconds: 1));
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expect(
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log, equals(<String>['scroll-start', 'scroll-update', 'scroll-end']));
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});
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testWidgets('Scroll animateTo', (WidgetTester tester) async {
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final List<String> log = <String>[];
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await tester.pumpWidget(_buildScroller(log: log));
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expect(log, equals(<String>[]));
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final Completer<Null> completer =
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animateTo(tester, 100.0, duration: const Duration(seconds: 1));
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expect(completer.isCompleted, isFalse);
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expect(log, equals(<String>['scroll-start']));
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await tester.pump(const Duration(milliseconds: 100));
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expect(log, equals(<String>['scroll-start']));
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await tester.pump(const Duration(milliseconds: 100));
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expect(log, equals(<String>['scroll-start', 'scroll-update']));
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await tester.pump(const Duration(milliseconds: 1500));
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expect(
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log,
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equals(<String>[
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'scroll-start',
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'scroll-update',
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'scroll-update',
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'scroll-end'
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]));
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expect(completer.isCompleted, isTrue);
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});
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testWidgets('Scroll jumpTo', (WidgetTester tester) async {
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final List<String> log = <String>[];
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await tester.pumpWidget(_buildScroller(log: log));
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expect(log, equals(<String>[]));
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jumpTo(tester, 100.0);
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expect(
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log, equals(<String>['scroll-start', 'scroll-update', 'scroll-end']));
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await tester.pump();
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expect(
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log, equals(<String>['scroll-start', 'scroll-update', 'scroll-end']));
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});
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testWidgets('Scroll jumpTo during animation', (WidgetTester tester) async {
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final List<String> log = <String>[];
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await tester.pumpWidget(_buildScroller(log: log));
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expect(log, equals(<String>[]));
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final Completer<Null> completer =
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animateTo(tester, 100.0, duration: const Duration(seconds: 1));
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expect(completer.isCompleted, isFalse);
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expect(log, equals(<String>['scroll-start']));
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await tester.pump(const Duration(milliseconds: 100));
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expect(log, equals(<String>['scroll-start']));
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await tester.pump(const Duration(milliseconds: 100));
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expect(log, equals(<String>['scroll-start', 'scroll-update']));
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expect(completer.isCompleted, isFalse);
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jumpTo(tester, 100.0);
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expect(completer.isCompleted, isFalse);
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expect(
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log,
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equals(<String>[
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'scroll-start',
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'scroll-update',
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'scroll-end',
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'scroll-start',
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'scroll-update',
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'scroll-end'
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]));
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await tester.pump(const Duration(milliseconds: 100));
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expect(
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log,
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equals(<String>[
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'scroll-start',
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'scroll-update',
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'scroll-end',
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'scroll-start',
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'scroll-update',
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'scroll-end'
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]));
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expect(completer.isCompleted, isTrue);
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await tester.pump(const Duration(milliseconds: 1500));
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expect(
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log,
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equals(<String>[
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'scroll-start',
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'scroll-update',
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'scroll-end',
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'scroll-start',
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'scroll-update',
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'scroll-end'
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]));
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expect(completer.isCompleted, isTrue);
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});
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testWidgets('Scroll scrollTo during animation', (WidgetTester tester) async {
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final List<String> log = <String>[];
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await tester.pumpWidget(_buildScroller(log: log));
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expect(log, equals(<String>[]));
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Completer<Null> completer =
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animateTo(tester, 100.0, duration: const Duration(seconds: 1));
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expect(completer.isCompleted, isFalse);
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expect(log, equals(<String>['scroll-start']));
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await tester.pump(const Duration(milliseconds: 100));
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expect(log, equals(<String>['scroll-start']));
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await tester.pump(const Duration(milliseconds: 100));
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expect(log, equals(<String>['scroll-start', 'scroll-update']));
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expect(completer.isCompleted, isFalse);
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completer = animateTo(tester, 100.0, duration: const Duration(seconds: 1));
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expect(completer.isCompleted, isFalse);
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expect(log, equals(<String>['scroll-start', 'scroll-update']));
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await tester.pump(const Duration(milliseconds: 100));
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expect(log, equals(<String>['scroll-start', 'scroll-update']));
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await tester.pump(const Duration(milliseconds: 1500));
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expect(
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log,
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equals(<String>[
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'scroll-start',
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'scroll-update',
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'scroll-update',
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'scroll-end'
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]));
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expect(completer.isCompleted, isTrue);
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});
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testWidgets('fling, fling generates two start/end pairs',
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(WidgetTester tester) async {
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final List<String> log = <String>[];
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await tester.pumpWidget(_buildScroller(log: log));
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// The ideal behaviour here would be a single start/end pair, but for
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// simplicity of implementation we compromise here and accept two. Should
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// you find a way to make this work with just one without complicating the
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// API, feel free to change the expectation here.
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expect(log, equals(<String>[]));
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await tester.flingFrom(
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const Offset(100.0, 100.0), const Offset(-50.0, -50.0), 500.0);
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await tester.pump(const Duration(seconds: 1));
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log.removeWhere((String value) => value == 'scroll-update');
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expect(log, equals(<String>['scroll-start']));
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await tester.flingFrom(
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const Offset(100.0, 100.0), const Offset(-50.0, -50.0), 500.0);
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log.removeWhere((String value) => value == 'scroll-update');
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expect(log, equals(<String>['scroll-start', 'scroll-end', 'scroll-start']));
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await tester.pump(const Duration(seconds: 1));
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await tester.pump(const Duration(seconds: 1));
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log.removeWhere((String value) => value == 'scroll-update');
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expect(
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log,
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equals(<String>[
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'scroll-start',
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'scroll-end',
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'scroll-start',
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'scroll-end'
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]));
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});
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testWidgets('fling, pause, fling generates two start/end pairs',
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(WidgetTester tester) async {
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final List<String> log = <String>[];
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await tester.pumpWidget(_buildScroller(log: log));
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expect(log, equals(<String>[]));
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await tester.flingFrom(
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const Offset(100.0, 100.0), const Offset(-50.0, -50.0), 500.0);
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await tester.pump(const Duration(seconds: 1));
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log.removeWhere((String value) => value == 'scroll-update');
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expect(log, equals(<String>['scroll-start']));
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await tester.pump(const Duration(minutes: 1));
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await tester.flingFrom(
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const Offset(100.0, 100.0), const Offset(-50.0, -50.0), 500.0);
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log.removeWhere((String value) => value == 'scroll-update');
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expect(log, equals(<String>['scroll-start', 'scroll-end', 'scroll-start']));
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await tester.pump(const Duration(seconds: 1));
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await tester.pump(const Duration(seconds: 1));
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log.removeWhere((String value) => value == 'scroll-update');
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expect(
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log,
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equals(<String>[
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'scroll-start',
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'scroll-end',
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'scroll-start',
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'scroll-end'
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]));
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});
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testWidgets('fling up ends', (WidgetTester tester) async {
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final List<String> log = <String>[];
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await tester.pumpWidget(_buildScroller(log: log));
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expect(log, equals(<String>[]));
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await tester.flingFrom(
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const Offset(100.0, 100.0), const Offset(50.0, 50.0), 500.0);
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await tester.pump(const Duration(seconds: 1));
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await tester.pump(const Duration(seconds: 1));
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await tester.pump(const Duration(seconds: 1));
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expect(log.first, equals('scroll-start'));
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expect(log.last, equals('scroll-end'));
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log.removeWhere((String value) => value == 'scroll-update');
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expect(log.length, equals(2));
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expect(
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tester.state<ScrollableState>(find.byType(Scrollable)).position.pixels,
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equals(0.0));
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});
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}
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