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e810bee6e5
* Fix scrolling of multiple SliverLists and SliverGrids * Update sliver_fixed_extent_list.dart * Update sliver_grid.dart
199 lines
7.1 KiB
Dart
199 lines
7.1 KiB
Dart
// 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_test/flutter_test.dart';
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import 'package:flutter/widgets.dart';
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import 'package:flutter/rendering.dart';
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Future<Null> test(WidgetTester tester, double offset, { double anchor: 0.0 }) {
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return tester.pumpWidget(
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new Directionality(
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textDirection: TextDirection.ltr,
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child: new Viewport(
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anchor: anchor / 600.0,
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offset: new ViewportOffset.fixed(offset),
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slivers: const <Widget>[
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const SliverToBoxAdapter(child: const SizedBox(height: 400.0)),
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const SliverToBoxAdapter(child: const SizedBox(height: 400.0)),
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const SliverToBoxAdapter(child: const SizedBox(height: 400.0)),
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const SliverToBoxAdapter(child: const SizedBox(height: 400.0)),
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const SliverToBoxAdapter(child: const 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, List<bool> idealVisibles) {
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final List<Offset> actualPositions = tester.renderObjectList<RenderBox>(find.byType(SizedBox)).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.renderObjectList<RenderSliverToBoxAdapter>(find.byType(SliverToBoxAdapter)).map<bool>(
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(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, 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, 600.0),
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const Offset(0.0, 600.0),
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const Offset(0.0, 600.0),
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], <bool>[true, true, false, false, false]);
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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, 600.0),
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const Offset(0.0, 600.0),
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], <bool>[true, true, false, false, false]);
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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, 600.0),
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], <bool>[false, true, true, false, false]);
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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, 600.0),
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], <bool>[false, false, true, true, false]);
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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, 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, 600.0),
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const Offset(0.0, 600.0),
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const Offset(0.0, 600.0),
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], <bool>[true, true, false, false, false]);
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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, 600.0),
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const Offset(0.0, 600.0),
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const Offset(0.0, 600.0),
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], <bool>[true, true, false, false, false]);
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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, 600.0),
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const Offset(0.0, 600.0),
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], <bool>[false, true, true, false, false]);
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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, 600.0),
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], <bool>[false, false, true, true, false]);
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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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new Center(
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child: new SizedBox(
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width: 44.4,
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height: 60.0,
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child: new Directionality(
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textDirection: TextDirection.ltr,
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child: new CustomScrollView(
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slivers: <Widget>[
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new SliverList(
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delegate: new SliverChildListDelegate(
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<Widget>[
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new Container(height: 22.2, child: const Text('TOP')),
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new Container(height: 22.2),
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new Container(height: 22.2),
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],
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),
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),
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new SliverFixedExtentList(
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itemExtent: 22.2,
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delegate: new SliverChildListDelegate(
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<Widget>[
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new Container(),
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new Container(child: const Text('A')),
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new Container(),
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],
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),
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),
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new SliverGrid(
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gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
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crossAxisCount: 2,
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),
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delegate: new SliverChildListDelegate(
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<Widget>[
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new Container(),
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new Container(child: const Text('B')),
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new Container(),
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],
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),
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),
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new SliverList(
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delegate: new SliverChildListDelegate(
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<Widget>[
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new Container(height: 22.2),
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new Container(height: 22.2),
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new 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 = 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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