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Add:创建 flutter go web 版
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ryan
254
packages/flutter_web/test/widgets/slivers_widgets_test.dart
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254
packages/flutter_web/test/widgets/slivers_widgets_test.dart
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// Copyright 2016 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_test/flutter_web_test.dart';
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import 'package:flutter_web/widgets.dart';
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import 'package:flutter_web/rendering.dart';
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Future<void> test(WidgetTester tester, double offset, {double anchor = 0.0}) {
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return tester.pumpWidget(
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Directionality(
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textDirection: TextDirection.ltr,
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child: Viewport(
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anchor: anchor / 600.0,
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offset: ViewportOffset.fixed(offset),
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slivers: const <Widget>[
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SliverToBoxAdapter(child: SizedBox(height: 400.0)),
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SliverToBoxAdapter(child: SizedBox(height: 400.0)),
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SliverToBoxAdapter(child: SizedBox(height: 400.0)),
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SliverToBoxAdapter(child: SizedBox(height: 400.0)),
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SliverToBoxAdapter(child: SizedBox(height: 400.0)),
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],
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),
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),
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);
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}
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void verify(WidgetTester tester, List<Offset> idealPositions,
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List<bool> idealVisibles) {
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final List<Offset> actualPositions = tester
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.renderObjectList<RenderBox>(find.byType(SizedBox, skipOffstage: false))
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.map<Offset>(
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(RenderBox target) => target.localToGlobal(const Offset(0.0, 0.0)))
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.toList();
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final List<bool> actualVisibles = tester
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.renderObjectList<RenderSliverToBoxAdapter>(
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find.byType(SliverToBoxAdapter, skipOffstage: false))
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.map<bool>((RenderSliverToBoxAdapter target) => target.geometry.visible)
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.toList();
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expect(actualPositions, equals(idealPositions));
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expect(actualVisibles, equals(idealVisibles));
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}
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void main() {
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testWidgets('Viewport basic test', (WidgetTester tester) async {
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await test(tester, 0.0);
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expect(tester.renderObject<RenderBox>(find.byType(Viewport)).size,
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equals(const Size(800.0, 600.0)));
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verify(tester, <Offset>[
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const Offset(0.0, 0.0),
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const Offset(0.0, 400.0),
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const Offset(0.0, 800.0),
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const Offset(0.0, 1200.0),
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const Offset(0.0, 1600.0),
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], <bool>[
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true,
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true,
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false,
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false,
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false
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]);
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await test(tester, 200.0);
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verify(tester, <Offset>[
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const Offset(0.0, -200.0),
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const Offset(0.0, 200.0),
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const Offset(0.0, 600.0),
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const Offset(0.0, 1000.0),
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const Offset(0.0, 1400.0),
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], <bool>[
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true,
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true,
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false,
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false,
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false
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]);
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await test(tester, 600.0);
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verify(tester, <Offset>[
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const Offset(0.0, -600.0),
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const Offset(0.0, -200.0),
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const Offset(0.0, 200.0),
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const Offset(0.0, 600.0),
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const Offset(0.0, 1000.0),
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], <bool>[
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false,
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true,
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true,
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false,
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false
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]);
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await test(tester, 900.0);
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verify(tester, <Offset>[
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const Offset(0.0, -900.0),
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const Offset(0.0, -500.0),
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const Offset(0.0, -100.0),
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const Offset(0.0, 300.0),
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const Offset(0.0, 700.0),
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], <bool>[
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false,
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false,
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true,
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true,
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false
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]);
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});
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testWidgets('Viewport anchor test', (WidgetTester tester) async {
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await test(tester, 0.0, anchor: 100.0);
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expect(tester.renderObject<RenderBox>(find.byType(Viewport)).size,
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equals(const Size(800.0, 600.0)));
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verify(tester, <Offset>[
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const Offset(0.0, 100.0),
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const Offset(0.0, 500.0),
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const Offset(0.0, 900.0),
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const Offset(0.0, 1300.0),
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const Offset(0.0, 1700.0),
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], <bool>[
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true,
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true,
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false,
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false,
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false
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]);
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await test(tester, 200.0, anchor: 100.0);
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verify(tester, <Offset>[
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const Offset(0.0, -100.0),
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const Offset(0.0, 300.0),
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const Offset(0.0, 700.0),
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const Offset(0.0, 1100.0),
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const Offset(0.0, 1500.0),
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], <bool>[
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true,
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true,
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false,
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false,
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false
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]);
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await test(tester, 600.0, anchor: 100.0);
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verify(tester, <Offset>[
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const Offset(0.0, -500.0),
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const Offset(0.0, -100.0),
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const Offset(0.0, 300.0),
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const Offset(0.0, 700.0),
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const Offset(0.0, 1100.0),
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], <bool>[
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false,
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true,
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true,
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false,
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false
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]);
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await test(tester, 900.0, anchor: 100.0);
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verify(tester, <Offset>[
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const Offset(0.0, -800.0),
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const Offset(0.0, -400.0),
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const Offset(0.0, 0.0),
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const Offset(0.0, 400.0),
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const Offset(0.0, 800.0),
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], <bool>[
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false,
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false,
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true,
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true,
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false
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]);
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});
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testWidgets('Multiple grids and lists', (WidgetTester tester) async {
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await tester.pumpWidget(
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Center(
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child: SizedBox(
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width: 44.4,
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height: 60.0,
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child: Directionality(
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textDirection: TextDirection.ltr,
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child: CustomScrollView(
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slivers: <Widget>[
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SliverList(
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delegate: SliverChildListDelegate(
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<Widget>[
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Container(height: 22.2, child: const Text('TOP')),
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Container(height: 22.2),
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Container(height: 22.2),
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],
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),
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),
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SliverFixedExtentList(
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itemExtent: 22.2,
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delegate: SliverChildListDelegate(
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<Widget>[
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Container(),
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Container(child: const Text('A')),
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Container(),
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],
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),
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),
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SliverGrid(
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gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
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crossAxisCount: 2,
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),
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delegate: SliverChildListDelegate(
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<Widget>[
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Container(),
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Container(child: const Text('B')),
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Container(),
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],
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),
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),
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SliverList(
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delegate: SliverChildListDelegate(
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<Widget>[
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Container(height: 22.2),
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Container(height: 22.2),
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Container(height: 22.2, child: const Text('BOTTOM')),
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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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),
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);
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final TestGesture gesture =
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await tester.startGesture(const Offset(400.0, 300.0));
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expect(find.text('TOP'), findsOneWidget);
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expect(find.text('A'), findsNothing);
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expect(find.text('B'), findsNothing);
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expect(find.text('BOTTOM'), findsNothing);
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await gesture.moveBy(const Offset(0.0, -70.0));
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await tester.pump();
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expect(find.text('TOP'), findsNothing);
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expect(find.text('A'), findsOneWidget);
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expect(find.text('B'), findsNothing);
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expect(find.text('BOTTOM'), findsNothing);
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await gesture.moveBy(const Offset(0.0, -70.0));
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await tester.pump();
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expect(find.text('TOP'), findsNothing);
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expect(find.text('A'), findsNothing);
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expect(find.text('B'), findsOneWidget);
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expect(find.text('BOTTOM'), findsNothing);
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await gesture.moveBy(const Offset(0.0, -70.0));
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await tester.pump();
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expect(find.text('TOP'), findsNothing);
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expect(find.text('A'), findsNothing);
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expect(find.text('B'), findsNothing);
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expect(find.text('BOTTOM'), findsOneWidget);
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});
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}
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