blob: 77a206a695299b83520b19d13c166247aa605996 [file] [log] [blame]
// Copyright 2014 The Flutter 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 'package:flutter/gestures.dart' show DragStartBehavior;
import 'package:flutter/rendering.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
import '../rendering/mock_canvas.dart';
import '../rendering/rendering_tester.dart';
import 'states.dart';
void main() {
testWidgets('Empty GridView', (WidgetTester tester) async {
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView.count(
dragStartBehavior: DragStartBehavior.down,
crossAxisCount: 4,
),
),
);
});
testWidgets('GridView.count control test', (WidgetTester tester) async {
final List<String> log = <String>[];
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView.count(
dragStartBehavior: DragStartBehavior.down,
crossAxisCount: 4,
children: kStates.map<Widget>((String state) {
return GestureDetector(
dragStartBehavior: DragStartBehavior.down,
onTap: () {
log.add(state);
},
child: Container(
color: const Color(0xFF0000FF),
child: Text(state),
),
);
}).toList(),
),
),
);
expect(tester.getSize(find.text('Arkansas')), equals(const Size(200.0, 200.0)));
for (int i = 0; i < 8; ++i) {
await tester.tap(find.text(kStates[i]));
expect(log, equals(<String>[kStates[i]]));
log.clear();
}
expect(find.text(kStates[12]), findsNothing);
expect(find.text('Nevada'), findsNothing);
await tester.drag(find.text('Arkansas'), const Offset(0.0, -200.0));
await tester.pump();
for (int i = 0; i < 4; ++i)
expect(find.text(kStates[i]), findsNothing);
for (int i = 4; i < 12; ++i) {
await tester.tap(find.text(kStates[i]));
expect(log, equals(<String>[kStates[i]]));
log.clear();
}
await tester.drag(find.text('Delaware'), const Offset(0.0, -4000.0));
await tester.pump();
expect(find.text('Alabama'), findsNothing);
expect(find.text('Pennsylvania'), findsNothing);
expect(tester.getCenter(find.text('Tennessee')), equals(const Offset(300.0, 100.0)));
await tester.tap(find.text('Tennessee'));
expect(log, equals(<String>['Tennessee']));
log.clear();
await tester.drag(find.text('Tennessee'), const Offset(0.0, 200.0));
await tester.pump();
await tester.tap(find.text('Tennessee'));
expect(log, equals(<String>['Tennessee']));
log.clear();
await tester.tap(find.text('Pennsylvania'));
expect(log, equals(<String>['Pennsylvania']));
log.clear();
});
testWidgets('GridView.extent control test', (WidgetTester tester) async {
final List<String> log = <String>[];
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView.extent(
dragStartBehavior: DragStartBehavior.down,
maxCrossAxisExtent: 200.0,
children: kStates.map<Widget>((String state) {
return GestureDetector(
dragStartBehavior: DragStartBehavior.down,
onTap: () {
log.add(state);
},
child: Container(
color: const Color(0xFF0000FF),
child: Text(state),
),
);
}).toList(),
),
),
);
expect(tester.getSize(find.text('Arkansas')), equals(const Size(200.0, 200.0)));
for (int i = 0; i < 8; ++i) {
await tester.tap(find.text(kStates[i]));
expect(log, equals(<String>[kStates[i]]));
log.clear();
}
expect(find.text('Nevada'), findsNothing);
await tester.drag(find.text('Arkansas'), const Offset(0.0, -4000.0));
await tester.pump();
expect(find.text('Alabama'), findsNothing);
expect(tester.getCenter(find.text('Tennessee')), equals(const Offset(300.0, 100.0)));
await tester.tap(find.text('Tennessee'));
expect(log, equals(<String>['Tennessee']));
log.clear();
});
testWidgets('GridView large scroll jump', (WidgetTester tester) async {
final List<int> log = <int>[];
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView.extent(
scrollDirection: Axis.horizontal,
maxCrossAxisExtent: 200.0,
childAspectRatio: 0.75,
children: List<Widget>.generate(80, (int i) {
return Builder(
builder: (BuildContext context) {
log.add(i);
return Text('$i');
},
);
}),
),
),
);
expect(tester.getSize(find.text('4')), equals(const Size(200.0 / 0.75, 200.0)));
expect(log, equals(<int>[
0, 1, 2, // col 0
3, 4, 5, // col 1
6, 7, 8, // col 2
9, 10, 11, // col 3 (in cached area)
]));
log.clear();
for (int i = 0; i < 9; i++) {
expect(find.text('$i'), findsOneWidget);
}
for (int i = 9; i < 80; i++) {
expect(find.text('$i'), findsNothing);
}
final ScrollableState state = tester.state(find.byType(Scrollable));
final ScrollPosition position = state.position;
position.jumpTo(3025.0);
expect(log, isEmpty);
await tester.pump();
expect(log, equals(<int>[
30, 31, 32, // col 10 (in cached area)
33, 34, 35, // col 11
36, 37, 38, // col 12
39, 40, 41, // col 13
42, 43, 44, // col 14
45, 46, 47, // col 15 (in cached area)
]));
log.clear();
for (int i = 0; i < 33; i++) {
expect(find.text('$i'), findsNothing);
}
for (int i = 33; i < 45; i++) {
expect(find.text('$i'), findsOneWidget);
}
for (int i = 45; i < 80; i++) {
expect(find.text('$i'), findsNothing);
}
position.jumpTo(975.0);
expect(log, isEmpty);
await tester.pump();
expect(log, equals(<int>[
6, 7, 8, // col2 (in cached area)
9, 10, 11, // col 3
12, 13, 14, // col 4
15, 16, 17, // col 5
18, 19, 20, // col 6
21, 22, 23, // col 7 (in cached area)
]));
log.clear();
for (int i = 0; i < 9; i++) {
expect(find.text('$i'), findsNothing);
}
for (int i = 9; i < 21; i++) {
expect(find.text('$i'), findsOneWidget);
}
for (int i = 21; i < 80; i++) {
expect(find.text('$i'), findsNothing);
}
});
testWidgets('GridView - change crossAxisCount', (WidgetTester tester) async {
final List<int> log = <int>[];
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView(
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 4,
),
children: List<Widget>.generate(40, (int i) {
return Builder(
builder: (BuildContext context) {
log.add(i);
return Text('$i');
},
);
}),
),
),
);
expect(tester.getSize(find.text('4')), equals(const Size(200.0, 200.0)));
expect(log, equals(<int>[
0, 1, 2, 3, // row 0
4, 5, 6, 7, // row 1
8, 9, 10, 11, // row 2
12, 13, 14, 15, // row 3 (in cached area)
16, 17, 18, 19, // row 4 (in cached area)
]));
for (int i = 0; i < 12; i++) {
expect(find.text('$i'), findsOneWidget);
}
for (int i = 12; i < 40; i++) {
expect(find.text('$i'), findsNothing);
}
log.clear();
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView(
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2,
),
children: List<Widget>.generate(40, (int i) {
return Builder(
builder: (BuildContext context) {
log.add(i);
return Text('$i');
},
);
}),
),
),
);
expect(log, equals(<int>[
0, 1, 2, 3, // row 0
4, 5, 6, 7, // row 1
8, 9, 10, 11, // row 2
12, 13, 14, 15, // row 3 (in cached area)
16, 17, 18, 19, // row 4 (in cached area)
]));
log.clear();
expect(tester.getSize(find.text('3')), equals(const Size(400.0, 400.0)));
expect(find.text('4'), findsNothing);
});
testWidgets('SliverGridRegularTileLayout - can handle close to zero mainAxisStride', (WidgetTester tester) async {
const SliverGridDelegateWithMaxCrossAxisExtent delegate = SliverGridDelegateWithMaxCrossAxisExtent(
childAspectRatio: 1e300,
maxCrossAxisExtent: 500.0,
);
final SliverGridLayout layout = delegate.getLayout(
const SliverConstraints(
axisDirection: AxisDirection.down,
growthDirection: GrowthDirection.forward,
userScrollDirection: ScrollDirection.forward,
scrollOffset: 100.0,
precedingScrollExtent: 0.0,
overlap: 0.0,
remainingPaintExtent: 0.0,
crossAxisExtent: 500,
crossAxisDirection: AxisDirection.right,
viewportMainAxisExtent: 100.0,
remainingCacheExtent: 0.0,
cacheOrigin: 0.0,
),
);
expect(layout.getMinChildIndexForScrollOffset(1000.0), 0.0);
});
testWidgets('GridView - change maxChildCrossAxisExtent', (WidgetTester tester) async {
final List<int> log = <int>[];
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView(
gridDelegate: const SliverGridDelegateWithMaxCrossAxisExtent(
maxCrossAxisExtent: 200.0,
),
children: List<Widget>.generate(40, (int i) {
return Builder(
builder: (BuildContext context) {
log.add(i);
return Text('$i');
},
);
}),
),
),
);
expect(tester.getSize(find.text('4')), equals(const Size(200.0, 200.0)));
expect(log, equals(<int>[
0, 1, 2, 3, // row 0
4, 5, 6, 7, // row 1
8, 9, 10, 11, // row 2
12, 13, 14, 15, // row 3 (in cached area)
16, 17, 18, 19, // row 4 (in cached area)
]));
for (int i = 0; i < 12; i++) {
expect(find.text('$i'), findsOneWidget);
}
for (int i = 12; i < 40; i++) {
expect(find.text('$i'), findsNothing);
}
log.clear();
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView(
gridDelegate: const SliverGridDelegateWithMaxCrossAxisExtent(
maxCrossAxisExtent: 400.0,
),
children: List<Widget>.generate(40, (int i) {
return Builder(
builder: (BuildContext context) {
log.add(i);
return Text('$i');
},
);
}),
),
),
);
expect(log, equals(<int>[
0, 1, 2, 3, // row 0
4, 5, 6, 7, // row 1
8, 9, 10, 11, // row 2
12, 13, 14, 15, // row 3 (in cached area)
16, 17, 18, 19, // row 4 (in cached area)
]));
log.clear();
expect(tester.getSize(find.text('3')), equals(const Size(400.0, 400.0)));
expect(find.text('4'), findsNothing);
});
testWidgets('One-line GridView paints', (WidgetTester tester) async {
const Color green = Color(0xFF00FF00);
final Container container = Container(
decoration: const BoxDecoration(
color: green,
),
);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: Center(
child: SizedBox(
height: 200.0,
child: GridView.count(
cacheExtent: 0.0,
crossAxisCount: 2,
children: <Widget>[ container, container, container, container ],
),
),
),
),
);
expect(find.byType(GridView), paints..rect(color: green)..rect(color: green));
expect(find.byType(GridView), isNot(paints..rect(color: green)..rect(color: green)..rect(color: green)));
});
testWidgets('GridView in zero context', (WidgetTester tester) async {
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: Center(
child: SizedBox(
width: 0.0,
height: 0.0,
child: GridView.count(
crossAxisCount: 4,
children: List<Widget>.generate(20, (int i) {
return Text('$i');
}),
),
),
),
),
);
expect(find.text('0'), findsNothing);
expect(find.text('1'), findsNothing);
});
testWidgets('GridView in unbounded context', (WidgetTester tester) async {
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: SingleChildScrollView(
child: GridView.count(
crossAxisCount: 4,
shrinkWrap: true,
children: List<Widget>.generate(20, (int i) {
return Text('$i');
}),
),
),
),
);
expect(find.text('0'), findsOneWidget);
expect(find.text('19'), findsOneWidget);
});
testWidgets('GridView.builder control test', (WidgetTester tester) async {
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView.builder(
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 4,
),
shrinkWrap: true,
itemCount: 20,
itemBuilder: (BuildContext context, int index) {
return Text('$index');
},
),
),
);
expect(find.text('0'), findsOneWidget);
expect(find.text('11'), findsOneWidget);
expect(find.text('12'), findsNothing);
});
testWidgets('GridView.builder with undefined itemCount', (WidgetTester tester) async {
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView.builder(
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 4,
),
shrinkWrap: true,
itemBuilder: (BuildContext context, int index) {
return Text('$index');
},
),
),
);
expect(find.text('0'), findsOneWidget);
expect(find.text('11'), findsOneWidget);
await tester.drag(find.byType(GridView), const Offset(0.0, -300.0));
await tester.pump(const Duration(milliseconds: 200));
expect(find.text('13'), findsOneWidget);
});
testWidgets('GridView cross axis layout', (WidgetTester tester) async {
final Key target = UniqueKey();
Widget build(TextDirection textDirection) {
return Directionality(
textDirection: textDirection,
child: GridView.count(
crossAxisCount: 4,
children: <Widget>[
Container(key: target),
],
),
);
}
await tester.pumpWidget(build(TextDirection.ltr));
expect(tester.getTopLeft(find.byKey(target)), Offset.zero);
expect(tester.getBottomRight(find.byKey(target)), const Offset(200.0, 200.0));
await tester.pumpWidget(build(TextDirection.rtl));
expect(tester.getTopLeft(find.byKey(target)), const Offset(600.0, 0.0));
expect(tester.getBottomRight(find.byKey(target)), const Offset(800.0, 200.0));
});
testWidgets('GridView crossAxisSpacing', (WidgetTester tester) async {
// Regression test for https://github.com/flutter/flutter/issues/27151.
final Key target = UniqueKey();
Widget build(TextDirection textDirection) {
return Directionality(
textDirection: textDirection,
child: GridView.count(
crossAxisCount: 4,
crossAxisSpacing: 8.0,
children: <Widget>[
Container(key: target),
],
),
);
}
await tester.pumpWidget(build(TextDirection.ltr));
expect(tester.getTopLeft(find.byKey(target)), Offset.zero);
expect(tester.getBottomRight(find.byKey(target)), const Offset(194.0, 194.0));
await tester.pumpWidget(build(TextDirection.rtl));
expect(tester.getTopLeft(find.byKey(target)), const Offset(606.0, 0.0));
expect(tester.getBottomRight(find.byKey(target)), const Offset(800.0, 194.0));
});
testWidgets('GridView does not cache itemBuilder calls', (WidgetTester tester) async {
final Map<int, int> counters = <int, int>{};
await tester.pumpWidget(Directionality(
textDirection: TextDirection.ltr,
child: GridView.builder(
itemCount: 1000,
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 3),
itemBuilder: (BuildContext context, int index) {
counters[index] = (counters[index] ?? 0) + 1;
return SizedBox(
key: ValueKey<int>(index),
width: 200,
height: 200,
);
},
),
));
expect(find.byKey(const ValueKey<int>(4)), findsOneWidget);
expect(counters[4], 1);
await tester.fling(find.byType(GridView), const Offset(0, -300), 5000);
await tester.pumpAndSettle();
expect(find.byKey(const ValueKey<int>(4)), findsNothing);
expect(counters[4], 1);
await tester.fling(find.byType(GridView), const Offset(0, 300), 5000);
await tester.pumpAndSettle();
expect(find.byKey(const ValueKey<int>(4)), findsOneWidget);
expect(counters[4], 2);
});
testWidgets('GridView respects clipBehavior', (WidgetTester tester) async {
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView(
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 3),
children: <Widget>[Container(height: 2000.0)],
),
),
);
// 1st, check that the render object has received the default clip behavior.
final RenderViewport renderObject = tester.allRenderObjects.whereType<RenderViewport>().first;
expect(renderObject.clipBehavior, equals(Clip.hardEdge));
// 2nd, check that the painting context has received the default clip behavior.
final TestClipPaintingContext context = TestClipPaintingContext();
renderObject.paint(context, Offset.zero);
expect(context.clipBehavior, equals(Clip.hardEdge));
// 3rd, pump a new widget to check that the render object can update its clip behavior.
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView(
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 3),
clipBehavior: Clip.antiAlias,
children: <Widget>[Container(height: 2000.0)],
),
),
);
expect(renderObject.clipBehavior, equals(Clip.antiAlias));
// 4th, check that a non-default clip behavior can be sent to the painting context.
renderObject.paint(context, Offset.zero);
expect(context.clipBehavior, equals(Clip.antiAlias));
});
testWidgets('GridView.builder respects clipBehavior', (WidgetTester tester) async {
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView.builder(
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 3),
itemCount: 10,
itemBuilder: (BuildContext _, int __) => Container(height: 2000.0),
clipBehavior: Clip.antiAlias,
),
),
);
final RenderViewport renderObject = tester.allRenderObjects.whereType<RenderViewport>().first;
expect(renderObject.clipBehavior, equals(Clip.antiAlias));
});
testWidgets('GridView.custom respects clipBehavior', (WidgetTester tester) async {
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView.custom(
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 3),
childrenDelegate: SliverChildBuilderDelegate(
(BuildContext context, int index) => Container(height: 2000.0),
childCount: 1,
),
clipBehavior: Clip.antiAlias,
),
),
);
final RenderViewport renderObject = tester.allRenderObjects.whereType<RenderViewport>().first;
expect(renderObject.clipBehavior, equals(Clip.antiAlias));
});
testWidgets('GridView.count respects clipBehavior', (WidgetTester tester) async {
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView.count(
crossAxisCount: 3,
clipBehavior: Clip.antiAlias,
children: <Widget>[Container(height: 2000.0)],
),
),
);
final RenderViewport renderObject = tester.allRenderObjects.whereType<RenderViewport>().first;
expect(renderObject.clipBehavior, equals(Clip.antiAlias));
});
testWidgets('GridView.extent respects clipBehavior', (WidgetTester tester) async {
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView.extent(
maxCrossAxisExtent: 1000,
clipBehavior: Clip.antiAlias,
children: <Widget>[Container(height: 2000.0)],
),
),
);
final RenderViewport renderObject = tester.allRenderObjects.whereType<RenderViewport>().first;
expect(renderObject.clipBehavior, equals(Clip.antiAlias));
});
testWidgets('SliverGridDelegateWithFixedCrossAxisCount mainAxisExtent works as expected', (WidgetTester tester) async {
const int crossAxisCount = 4;
const double mainAxisExtent = 100.0;
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView(
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: crossAxisCount,
mainAxisExtent: mainAxisExtent,
),
children: List<Widget>.generate(20, (int i) {
return Builder(
builder: (BuildContext context) {
return Text('$i');
},
);
}),
),
),
);
expect(tester.getSize(find.text('4')), equals(const Size(200.0, mainAxisExtent)));
});
testWidgets('SliverGridDelegateWithMaxCrossAxisExtent mainAxisExtent works as expected', (WidgetTester tester) async {
const double maxCrossAxisExtent = 200.0;
const double mainAxisExtent = 100.0;
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: GridView(
gridDelegate: const SliverGridDelegateWithMaxCrossAxisExtent(
maxCrossAxisExtent: maxCrossAxisExtent,
mainAxisExtent: mainAxisExtent,
),
children: List<Widget>.generate(20, (int i) {
return Builder(
builder: (BuildContext context) {
return Text('$i');
},
);
}),
),
),
);
expect(tester.getSize(find.text('4')), equals(const Size(200.0, mainAxisExtent)));
});
testWidgets('SliverGridDelegateWithMaxCrossAxisExtent throws assertion error when maxCrossAxisExtent is 0', (WidgetTester tester) async {
const double maxCrossAxisExtent = 0;
expect(() => Directionality(
textDirection: TextDirection.ltr,
child: GridView.extent(
maxCrossAxisExtent: maxCrossAxisExtent,
),
), throwsAssertionError);
});
}