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