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156b4220b4
Updates documentation and non-public API to use American spellings for consistency with the rest of the codebase. No changes to behaviour... other than how it's spelt.
196 lines
9.1 KiB
Dart
196 lines
9.1 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_test/flutter_test.dart';
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import 'package:flutter/widgets.dart';
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import 'package:meta/meta.dart';
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Widget _buildScroller({ List<String> log }) {
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return 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: SingleChildScrollView(
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child: 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<void> animateTo(WidgetTester tester, double newScrollOffset, { @required Duration duration }) {
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final Completer<void> completer = Completer<void>();
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final ScrollableState scrollable = tester.state(find.byType(Scrollable));
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scrollable.position.animateTo(newScrollOffset, duration: duration, curve: Curves.linear).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 = 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(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(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<void> 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']));
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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(log, equals(<String>['scroll-start', 'scroll-update', 'scroll-update', 'scroll-end']));
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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(log, equals(<String>['scroll-start', 'scroll-update', 'scroll-end']));
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await tester.pump();
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expect(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<void> 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']));
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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(log, equals(<String>['scroll-start', 'scroll-update', 'scroll-end', 'scroll-start', 'scroll-update', 'scroll-end']));
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await tester.pump(const Duration(milliseconds: 100));
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expect(log, equals(<String>['scroll-start', 'scroll-update', 'scroll-end', 'scroll-start', 'scroll-update', 'scroll-end']));
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expect(completer.isCompleted, isTrue);
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await tester.pump(const Duration(milliseconds: 1500));
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expect(log, equals(<String>['scroll-start', 'scroll-update', 'scroll-end', 'scroll-start', 'scroll-update', 'scroll-end']));
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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<void> 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']));
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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(log, equals(<String>['scroll-start', 'scroll-update', 'scroll-update', 'scroll-end']));
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expect(completer.isCompleted, isTrue);
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});
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testWidgets('fling, fling generates two start/end pairs', (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 behavior 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(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(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(log, equals(<String>['scroll-start', 'scroll-end', 'scroll-start', 'scroll-end']));
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});
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testWidgets('fling, pause, fling generates two start/end pairs', (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(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(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(log, equals(<String>['scroll-start', 'scroll-end', 'scroll-start', 'scroll-end']));
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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(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(tester.state<ScrollableState>(find.byType(Scrollable)).position.pixels, equals(0.0));
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});
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}
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