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686
packages/flutter_web/test/widgets/scrollable_semantics_test.dart
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686
packages/flutter_web/test/widgets/scrollable_semantics_test.dart
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// Copyright 2017 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 'package:flutter_web_ui/ui.dart';
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import 'package:flutter_web/material.dart';
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import 'package:flutter_web_test/flutter_web_test.dart';
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import 'package:flutter_web/rendering.dart';
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import 'package:flutter_web/widgets.dart';
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import 'package:flutter_web/gestures.dart' show DragStartBehavior;
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import 'semantics_tester.dart';
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void main() {
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SemanticsTester semantics;
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setUp(() {
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debugResetSemanticsIdCounter();
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});
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testWidgets('scrollable exposes the correct semantic actions',
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(WidgetTester tester) async {
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semantics = SemanticsTester(tester);
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final List<Widget> textWidgets = <Widget>[];
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for (int i = 0; i < 80; i++) textWidgets.add(Text('$i'));
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ListView(children: textWidgets),
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),
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);
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expect(semantics,
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includesNodeWith(actions: <SemanticsAction>[SemanticsAction.scrollUp]));
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await flingUp(tester);
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expect(
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semantics,
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includesNodeWith(actions: <SemanticsAction>[
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SemanticsAction.scrollUp,
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SemanticsAction.scrollDown
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]));
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await flingDown(tester, repetitions: 2);
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expect(semantics,
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includesNodeWith(actions: <SemanticsAction>[SemanticsAction.scrollUp]));
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await flingUp(tester, repetitions: 5);
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expect(
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semantics,
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includesNodeWith(
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actions: <SemanticsAction>[SemanticsAction.scrollDown]));
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await flingDown(tester);
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expect(
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semantics,
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includesNodeWith(actions: <SemanticsAction>[
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SemanticsAction.scrollUp,
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SemanticsAction.scrollDown
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]));
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semantics.dispose();
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});
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testWidgets('showOnScreen works in scrollable', (WidgetTester tester) async {
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semantics = SemanticsTester(tester); // enables semantics tree generation
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const double kItemHeight = 40.0;
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final List<Widget> containers = <Widget>[];
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for (int i = 0; i < 80; i++)
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containers.add(MergeSemantics(
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child: Container(
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height: kItemHeight,
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child: Text('container $i', textDirection: TextDirection.ltr),
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)));
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final ScrollController scrollController = ScrollController(
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initialScrollOffset: kItemHeight / 2,
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);
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await tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: ListView(
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controller: scrollController,
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children: containers,
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),
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),
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);
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expect(scrollController.offset, kItemHeight / 2);
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final int firstContainerId =
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tester.renderObject(find.byWidget(containers.first)).debugSemantics.id;
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tester.binding.pipelineOwner.semanticsOwner
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.performAction(firstContainerId, SemanticsAction.showOnScreen);
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await tester.pump();
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await tester.pump(const Duration(seconds: 5));
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expect(scrollController.offset, 0.0);
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semantics.dispose();
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});
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testWidgets('showOnScreen works with pinned app bar and sliver list',
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(WidgetTester tester) async {
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semantics = SemanticsTester(tester); // enables semantics tree generation
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const double kItemHeight = 100.0;
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const double kExpandedAppBarHeight = 56.0;
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final List<Widget> containers = <Widget>[];
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for (int i = 0; i < 80; i++)
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containers.add(MergeSemantics(
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child: Container(
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height: kItemHeight,
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child: Text('container $i'),
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)));
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final ScrollController scrollController = ScrollController(
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initialScrollOffset: kItemHeight / 2,
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);
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await tester.pumpWidget(Directionality(
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textDirection: TextDirection.ltr,
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child: Localizations(
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locale: const Locale('en', 'us'),
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delegates: const <LocalizationsDelegate<dynamic>>[
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DefaultWidgetsLocalizations.delegate,
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DefaultMaterialLocalizations.delegate,
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],
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child: MediaQuery(
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data: const MediaQueryData(),
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child: Scrollable(
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controller: scrollController,
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viewportBuilder: (BuildContext context, ViewportOffset offset) {
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return Viewport(
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offset: offset,
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slivers: <Widget>[
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const SliverAppBar(
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pinned: true,
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expandedHeight: kExpandedAppBarHeight,
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flexibleSpace: FlexibleSpaceBar(
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title: Text('App Bar'),
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),
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),
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SliverList(
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delegate: SliverChildListDelegate(containers),
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)
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],
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);
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}),
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),
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),
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));
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expect(scrollController.offset, kItemHeight / 2);
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final int firstContainerId =
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tester.renderObject(find.byWidget(containers.first)).debugSemantics.id;
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tester.binding.pipelineOwner.semanticsOwner
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.performAction(firstContainerId, SemanticsAction.showOnScreen);
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await tester.pump();
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await tester.pump(const Duration(seconds: 5));
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expect(tester.getTopLeft(find.byWidget(containers.first)).dy,
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kExpandedAppBarHeight);
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semantics.dispose();
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});
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testWidgets('showOnScreen works with pinned app bar and individual slivers',
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(WidgetTester tester) async {
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semantics = SemanticsTester(tester); // enables semantics tree generation
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const double kItemHeight = 100.0;
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const double kExpandedAppBarHeight = 256.0;
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final List<Widget> children = <Widget>[];
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final List<Widget> slivers = List<Widget>.generate(30, (int i) {
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final Widget child = MergeSemantics(
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child: Container(
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child: Text('Item $i'),
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height: 72.0,
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),
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);
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children.add(child);
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return SliverToBoxAdapter(
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child: child,
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);
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});
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final ScrollController scrollController = ScrollController(
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initialScrollOffset: 2.5 * kItemHeight,
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);
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await tester.pumpWidget(Directionality(
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textDirection: TextDirection.ltr,
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child: MediaQuery(
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data: const MediaQueryData(),
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child: Localizations(
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locale: const Locale('en', 'us'),
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delegates: const <LocalizationsDelegate<dynamic>>[
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DefaultWidgetsLocalizations.delegate,
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DefaultMaterialLocalizations.delegate,
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],
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child: Scrollable(
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controller: scrollController,
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viewportBuilder: (BuildContext context, ViewportOffset offset) {
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return Viewport(
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offset: offset,
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slivers: <Widget>[
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const SliverAppBar(
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pinned: true,
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expandedHeight: kExpandedAppBarHeight,
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flexibleSpace: FlexibleSpaceBar(
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title: Text('App Bar'),
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),
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),
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]..addAll(slivers),
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);
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},
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),
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),
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),
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));
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expect(scrollController.offset, 2.5 * kItemHeight);
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final int id0 =
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tester.renderObject(find.byWidget(children[0])).debugSemantics.id;
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tester.binding.pipelineOwner.semanticsOwner
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.performAction(id0, SemanticsAction.showOnScreen);
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await tester.pump();
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await tester.pump(const Duration(seconds: 5));
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expect(tester.getTopLeft(find.byWidget(children[0])).dy, kToolbarHeight);
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semantics.dispose();
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});
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testWidgets('correct scrollProgress', (WidgetTester tester) async {
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semantics = SemanticsTester(tester);
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final List<Widget> textWidgets = <Widget>[];
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for (int i = 0; i < 80; i++) textWidgets.add(Text('$i'));
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await tester.pumpWidget(Directionality(
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textDirection: TextDirection.ltr,
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child: ListView(children: textWidgets),
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));
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expect(
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semantics,
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includesNodeWith(
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scrollExtentMin: 0.0,
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scrollPosition: 0.0,
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scrollExtentMax: 520.0,
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actions: <SemanticsAction>[
|
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SemanticsAction.scrollUp,
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],
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));
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await flingUp(tester);
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expect(
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semantics,
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includesNodeWith(
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scrollExtentMin: 0.0,
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scrollPosition: 380.2,
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scrollExtentMax: 520.0,
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actions: <SemanticsAction>[
|
||||
SemanticsAction.scrollUp,
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SemanticsAction.scrollDown,
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],
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));
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await flingUp(tester);
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expect(
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semantics,
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includesNodeWith(
|
||||
scrollExtentMin: 0.0,
|
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scrollPosition: 520.0,
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scrollExtentMax: 520.0,
|
||||
actions: <SemanticsAction>[
|
||||
SemanticsAction.scrollDown,
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],
|
||||
));
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semantics.dispose();
|
||||
});
|
||||
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testWidgets('correct scrollProgress for unbound',
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(WidgetTester tester) async {
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semantics = SemanticsTester(tester);
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await tester.pumpWidget(Directionality(
|
||||
textDirection: TextDirection.ltr,
|
||||
child: ListView.builder(
|
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dragStartBehavior: DragStartBehavior.down,
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||||
itemExtent: 20.0,
|
||||
itemBuilder: (BuildContext context, int index) {
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return Text('entry $index');
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||||
},
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||||
),
|
||||
));
|
||||
|
||||
expect(
|
||||
semantics,
|
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includesNodeWith(
|
||||
scrollExtentMin: 0.0,
|
||||
scrollPosition: 0.0,
|
||||
scrollExtentMax: double.infinity,
|
||||
actions: <SemanticsAction>[
|
||||
SemanticsAction.scrollUp,
|
||||
],
|
||||
));
|
||||
|
||||
await flingUp(tester);
|
||||
|
||||
expect(
|
||||
semantics,
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includesNodeWith(
|
||||
scrollExtentMin: 0.0,
|
||||
scrollPosition: 380.2,
|
||||
scrollExtentMax: double.infinity,
|
||||
actions: <SemanticsAction>[
|
||||
SemanticsAction.scrollUp,
|
||||
SemanticsAction.scrollDown,
|
||||
],
|
||||
));
|
||||
|
||||
await flingUp(tester);
|
||||
|
||||
expect(
|
||||
semantics,
|
||||
includesNodeWith(
|
||||
scrollExtentMin: 0.0,
|
||||
scrollPosition: 760.4,
|
||||
scrollExtentMax: double.infinity,
|
||||
actions: <SemanticsAction>[
|
||||
SemanticsAction.scrollUp,
|
||||
SemanticsAction.scrollDown,
|
||||
],
|
||||
));
|
||||
|
||||
semantics.dispose();
|
||||
});
|
||||
|
||||
testWidgets('Semantics tree is populated mid-scroll',
|
||||
(WidgetTester tester) async {
|
||||
semantics = SemanticsTester(tester);
|
||||
|
||||
final List<Widget> children = <Widget>[];
|
||||
for (int i = 0; i < 80; i++)
|
||||
children.add(Container(
|
||||
child: Text('Item $i'),
|
||||
height: 40.0,
|
||||
));
|
||||
await tester.pumpWidget(
|
||||
Directionality(
|
||||
textDirection: TextDirection.ltr,
|
||||
child: ListView(children: children),
|
||||
),
|
||||
);
|
||||
|
||||
final TestGesture gesture =
|
||||
await tester.startGesture(tester.getCenter(find.byType(ListView)));
|
||||
await gesture.moveBy(const Offset(0.0, -40.0));
|
||||
await tester.pump();
|
||||
|
||||
expect(semantics, includesNodeWith(label: 'Item 1'));
|
||||
expect(semantics, includesNodeWith(label: 'Item 2'));
|
||||
expect(semantics, includesNodeWith(label: 'Item 3'));
|
||||
|
||||
semantics.dispose();
|
||||
});
|
||||
|
||||
testWidgets('Can toggle semantics on, off, on without crash',
|
||||
(WidgetTester tester) async {
|
||||
await tester.pumpWidget(
|
||||
Directionality(
|
||||
textDirection: TextDirection.ltr,
|
||||
child: ListView(
|
||||
children: List<Widget>.generate(40, (int i) {
|
||||
return Container(
|
||||
child: Text('item $i'),
|
||||
height: 400.0,
|
||||
);
|
||||
}),
|
||||
),
|
||||
),
|
||||
);
|
||||
|
||||
final TestSemantics expectedSemantics = TestSemantics.root(
|
||||
children: <TestSemantics>[
|
||||
TestSemantics.rootChild(
|
||||
children: <TestSemantics>[
|
||||
TestSemantics(
|
||||
flags: <SemanticsFlag>[
|
||||
SemanticsFlag.hasImplicitScrolling,
|
||||
],
|
||||
actions: <SemanticsAction>[SemanticsAction.scrollUp],
|
||||
children: <TestSemantics>[
|
||||
TestSemantics(
|
||||
label: r'item 0',
|
||||
textDirection: TextDirection.ltr,
|
||||
),
|
||||
TestSemantics(
|
||||
label: r'item 1',
|
||||
textDirection: TextDirection.ltr,
|
||||
),
|
||||
TestSemantics(
|
||||
flags: <SemanticsFlag>[
|
||||
SemanticsFlag.isHidden,
|
||||
],
|
||||
label: r'item 2',
|
||||
),
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
],
|
||||
);
|
||||
|
||||
// Start with semantics off.
|
||||
expect(tester.binding.pipelineOwner.semanticsOwner, isNull);
|
||||
|
||||
// Semantics on
|
||||
semantics = SemanticsTester(tester);
|
||||
await tester.pumpAndSettle();
|
||||
expect(tester.binding.pipelineOwner.semanticsOwner, isNotNull);
|
||||
expect(
|
||||
semantics,
|
||||
hasSemantics(expectedSemantics,
|
||||
ignoreId: true, ignoreRect: true, ignoreTransform: true));
|
||||
|
||||
// Semantics off
|
||||
semantics.dispose();
|
||||
await tester.pumpAndSettle();
|
||||
expect(tester.binding.pipelineOwner.semanticsOwner, isNull);
|
||||
|
||||
// Semantics on
|
||||
semantics = SemanticsTester(tester);
|
||||
await tester.pumpAndSettle();
|
||||
expect(tester.binding.pipelineOwner.semanticsOwner, isNotNull);
|
||||
expect(
|
||||
semantics,
|
||||
hasSemantics(expectedSemantics,
|
||||
ignoreId: true, ignoreRect: true, ignoreTransform: true));
|
||||
|
||||
semantics.dispose();
|
||||
});
|
||||
|
||||
group('showOnScreen', () {
|
||||
const double kItemHeight = 100.0;
|
||||
|
||||
List<Widget> children;
|
||||
ScrollController scrollController;
|
||||
Widget widgetUnderTest;
|
||||
|
||||
setUp(() {
|
||||
children = List<Widget>.generate(10, (int i) {
|
||||
return MergeSemantics(
|
||||
child: Container(
|
||||
height: kItemHeight,
|
||||
child: Text('container $i'),
|
||||
),
|
||||
);
|
||||
});
|
||||
|
||||
scrollController = ScrollController(
|
||||
initialScrollOffset: kItemHeight / 2,
|
||||
);
|
||||
|
||||
widgetUnderTest = Directionality(
|
||||
textDirection: TextDirection.ltr,
|
||||
child: Center(
|
||||
child: Container(
|
||||
height: 2 * kItemHeight,
|
||||
child: ListView(
|
||||
controller: scrollController,
|
||||
children: children,
|
||||
),
|
||||
),
|
||||
),
|
||||
);
|
||||
});
|
||||
|
||||
testWidgets('brings item above leading edge to leading edge',
|
||||
(WidgetTester tester) async {
|
||||
semantics = SemanticsTester(tester); // enables semantics tree generation
|
||||
|
||||
await tester.pumpWidget(widgetUnderTest);
|
||||
|
||||
expect(scrollController.offset, kItemHeight / 2);
|
||||
|
||||
final int firstContainerId =
|
||||
tester.renderObject(find.byWidget(children.first)).debugSemantics.id;
|
||||
tester.binding.pipelineOwner.semanticsOwner
|
||||
.performAction(firstContainerId, SemanticsAction.showOnScreen);
|
||||
await tester.pumpAndSettle();
|
||||
|
||||
expect(scrollController.offset, 0.0);
|
||||
|
||||
semantics.dispose();
|
||||
});
|
||||
|
||||
testWidgets('brings item below trailing edge to trailing edge',
|
||||
(WidgetTester tester) async {
|
||||
semantics = SemanticsTester(tester); // enables semantics tree generation
|
||||
|
||||
await tester.pumpWidget(widgetUnderTest);
|
||||
|
||||
expect(scrollController.offset, kItemHeight / 2);
|
||||
|
||||
final int firstContainerId =
|
||||
tester.renderObject(find.byWidget(children[2])).debugSemantics.id;
|
||||
tester.binding.pipelineOwner.semanticsOwner
|
||||
.performAction(firstContainerId, SemanticsAction.showOnScreen);
|
||||
await tester.pumpAndSettle();
|
||||
|
||||
expect(scrollController.offset, kItemHeight);
|
||||
|
||||
semantics.dispose();
|
||||
});
|
||||
|
||||
testWidgets('does not change position of items already fully on-screen',
|
||||
(WidgetTester tester) async {
|
||||
semantics = SemanticsTester(tester); // enables semantics tree generation
|
||||
|
||||
await tester.pumpWidget(widgetUnderTest);
|
||||
|
||||
expect(scrollController.offset, kItemHeight / 2);
|
||||
|
||||
final int firstContainerId =
|
||||
tester.renderObject(find.byWidget(children[1])).debugSemantics.id;
|
||||
tester.binding.pipelineOwner.semanticsOwner
|
||||
.performAction(firstContainerId, SemanticsAction.showOnScreen);
|
||||
await tester.pumpAndSettle();
|
||||
|
||||
expect(scrollController.offset, kItemHeight / 2);
|
||||
|
||||
semantics.dispose();
|
||||
});
|
||||
});
|
||||
|
||||
group('showOnScreen with negative children', () {
|
||||
const double kItemHeight = 100.0;
|
||||
|
||||
List<Widget> children;
|
||||
ScrollController scrollController;
|
||||
Widget widgetUnderTest;
|
||||
|
||||
setUp(() {
|
||||
final Key center = GlobalKey();
|
||||
|
||||
children = List<Widget>.generate(10, (int i) {
|
||||
return SliverToBoxAdapter(
|
||||
key: i == 5 ? center : null,
|
||||
child: MergeSemantics(
|
||||
key: ValueKey<int>(i),
|
||||
child: Container(
|
||||
height: kItemHeight,
|
||||
child: Text('container $i'),
|
||||
),
|
||||
),
|
||||
);
|
||||
});
|
||||
|
||||
scrollController = ScrollController(
|
||||
initialScrollOffset: -2.5 * kItemHeight,
|
||||
);
|
||||
|
||||
// 'container 0' is at offset -500
|
||||
// 'container 1' is at offset -400
|
||||
// 'container 2' is at offset -300
|
||||
// 'container 3' is at offset -200
|
||||
// 'container 4' is at offset -100
|
||||
// 'container 5' is at offset 0
|
||||
|
||||
widgetUnderTest = Directionality(
|
||||
textDirection: TextDirection.ltr,
|
||||
child: Center(
|
||||
child: Container(
|
||||
height: 2 * kItemHeight,
|
||||
child: Scrollable(
|
||||
controller: scrollController,
|
||||
viewportBuilder: (BuildContext context, ViewportOffset offset) {
|
||||
return Viewport(
|
||||
cacheExtent: 0.0,
|
||||
offset: offset,
|
||||
center: center,
|
||||
slivers: children);
|
||||
},
|
||||
),
|
||||
),
|
||||
),
|
||||
);
|
||||
});
|
||||
|
||||
testWidgets('brings item above leading edge to leading edge',
|
||||
(WidgetTester tester) async {
|
||||
semantics = SemanticsTester(tester); // enables semantics tree generation
|
||||
|
||||
await tester.pumpWidget(widgetUnderTest);
|
||||
|
||||
expect(scrollController.offset, -250.0);
|
||||
|
||||
final int firstContainerId = tester
|
||||
.renderObject(find.byKey(const ValueKey<int>(2)))
|
||||
.debugSemantics
|
||||
.id;
|
||||
tester.binding.pipelineOwner.semanticsOwner
|
||||
.performAction(firstContainerId, SemanticsAction.showOnScreen);
|
||||
await tester.pumpAndSettle();
|
||||
|
||||
expect(scrollController.offset, -300.0);
|
||||
|
||||
semantics.dispose();
|
||||
});
|
||||
|
||||
testWidgets('brings item below trailing edge to trailing edge',
|
||||
(WidgetTester tester) async {
|
||||
semantics = SemanticsTester(tester); // enables semantics tree generation
|
||||
|
||||
await tester.pumpWidget(widgetUnderTest);
|
||||
|
||||
expect(scrollController.offset, -250.0);
|
||||
|
||||
final int firstContainerId = tester
|
||||
.renderObject(find.byKey(const ValueKey<int>(4)))
|
||||
.debugSemantics
|
||||
.id;
|
||||
tester.binding.pipelineOwner.semanticsOwner
|
||||
.performAction(firstContainerId, SemanticsAction.showOnScreen);
|
||||
await tester.pumpAndSettle();
|
||||
|
||||
expect(scrollController.offset, -200.0);
|
||||
|
||||
semantics.dispose();
|
||||
});
|
||||
|
||||
testWidgets('does not change position of items already fully on-screen',
|
||||
(WidgetTester tester) async {
|
||||
semantics = SemanticsTester(tester); // enables semantics tree generation
|
||||
|
||||
await tester.pumpWidget(widgetUnderTest);
|
||||
|
||||
expect(scrollController.offset, -250.0);
|
||||
|
||||
final int firstContainerId = tester
|
||||
.renderObject(find.byKey(const ValueKey<int>(3)))
|
||||
.debugSemantics
|
||||
.id;
|
||||
tester.binding.pipelineOwner.semanticsOwner
|
||||
.performAction(firstContainerId, SemanticsAction.showOnScreen);
|
||||
await tester.pumpAndSettle();
|
||||
|
||||
expect(scrollController.offset, -250.0);
|
||||
|
||||
semantics.dispose();
|
||||
});
|
||||
});
|
||||
}
|
||||
|
||||
Future<void> flingUp(WidgetTester tester, {int repetitions = 1}) =>
|
||||
fling(tester, const Offset(0.0, -200.0), repetitions);
|
||||
|
||||
Future<void> flingDown(WidgetTester tester, {int repetitions = 1}) =>
|
||||
fling(tester, const Offset(0.0, 200.0), repetitions);
|
||||
|
||||
Future<void> flingRight(WidgetTester tester, {int repetitions = 1}) =>
|
||||
fling(tester, const Offset(200.0, 0.0), repetitions);
|
||||
|
||||
Future<void> flingLeft(WidgetTester tester, {int repetitions = 1}) =>
|
||||
fling(tester, const Offset(-200.0, 0.0), repetitions);
|
||||
|
||||
Future<void> fling(WidgetTester tester, Offset offset, int repetitions) async {
|
||||
while (repetitions-- > 0) {
|
||||
await tester.fling(find.byType(ListView), offset, 1000.0);
|
||||
await tester.pump();
|
||||
await tester.pump(const Duration(seconds: 5));
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user