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2680 lines (2413 loc) · 88.6 KB
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// 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/foundation.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/services.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:leak_tracker_testing/leak_tracker_testing.dart';
typedef ElementRebuildCallback = void Function(StatefulElement element);
const Color _green = Color(0xFF00FF00);
class TestState extends State<StatefulWidget> {
@override
Widget build(BuildContext context) => const SizedBox();
}
@optionalTypeArgs
class _MyGlobalObjectKey<T extends State<StatefulWidget>> extends GlobalObjectKey<T> {
const _MyGlobalObjectKey(super.value);
}
void main() {
testWidgets('UniqueKey control test', (WidgetTester tester) async {
final Key key = UniqueKey();
expect(key, hasOneLineDescription);
expect(key, isNot(equals(UniqueKey())));
});
testWidgets('ObjectKey control test', (WidgetTester tester) async {
final a = Object();
final b = Object();
final Key keyA = ObjectKey(a);
final Key keyA2 = ObjectKey(a);
final Key keyB = ObjectKey(b);
expect(keyA, hasOneLineDescription);
expect(keyA, equals(keyA2));
expect(keyA.hashCode, equals(keyA2.hashCode));
expect(keyA, isNot(equals(keyB)));
});
testWidgets('GlobalObjectKey toString test', (WidgetTester tester) async {
const GlobalObjectKey one = GlobalObjectKey(1);
const two = GlobalObjectKey<TestState>(2);
const GlobalObjectKey three = _MyGlobalObjectKey(3);
const GlobalObjectKey<TestState> four = _MyGlobalObjectKey<TestState>(4);
expect(one.toString(), equals('[GlobalObjectKey ${describeIdentity(1)}]'));
expect(two.toString(), equals('[GlobalObjectKey<TestState> ${describeIdentity(2)}]'));
expect(three.toString(), equals('[_MyGlobalObjectKey ${describeIdentity(3)}]'));
expect(four.toString(), equals('[_MyGlobalObjectKey<TestState> ${describeIdentity(4)}]'));
});
testWidgets('GlobalObjectKey control test', (WidgetTester tester) async {
final a = Object();
final b = Object();
final Key keyA = GlobalObjectKey(a);
final Key keyA2 = GlobalObjectKey(a);
final Key keyB = GlobalObjectKey(b);
expect(keyA, hasOneLineDescription);
expect(keyA, equals(keyA2));
expect(keyA.hashCode, equals(keyA2.hashCode));
expect(keyA, isNot(equals(keyB)));
});
testWidgets(
'GlobalKey correct case 1 - can move global key from container widget to layoutbuilder',
(WidgetTester tester) async {
final Key key = GlobalKey(debugLabel: 'correct');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(
key: const ValueKey<int>(1),
child: SizedBox(key: key),
),
LayoutBuilder(
key: const ValueKey<int>(2),
builder: (BuildContext context, BoxConstraints constraints) {
return const Placeholder();
},
),
],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: const ValueKey<int>(1), child: const Placeholder()),
LayoutBuilder(
key: const ValueKey<int>(2),
builder: (BuildContext context, BoxConstraints constraints) {
return SizedBox(key: key);
},
),
],
),
);
},
);
testWidgets(
'GlobalKey correct case 2 - can move global key from layoutbuilder to container widget',
(WidgetTester tester) async {
final Key key = GlobalKey(debugLabel: 'correct');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: const ValueKey<int>(1), child: const Placeholder()),
LayoutBuilder(
key: const ValueKey<int>(2),
builder: (BuildContext context, BoxConstraints constraints) {
return SizedBox(key: key);
},
),
],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(
key: const ValueKey<int>(1),
child: SizedBox(key: key),
),
LayoutBuilder(
key: const ValueKey<int>(2),
builder: (BuildContext context, BoxConstraints constraints) {
return const Placeholder();
},
),
],
),
);
},
);
testWidgets(
'GlobalKey correct case 3 - can deal with early rebuild in layoutbuilder - move backward',
(WidgetTester tester) async {
final Key key1 = GlobalKey(debugLabel: 'Text1');
final Key key2 = GlobalKey(debugLabel: 'Text2');
Key? rebuiltKeyOfSecondChildBeforeLayout;
Key? rebuiltKeyOfFirstChildAfterLayout;
Key? rebuiltKeyOfSecondChildAfterLayout;
await tester.pumpWidget(
LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
return Column(
children: <Widget>[
_Stateful(
child: Text('Text1', textDirection: TextDirection.ltr, key: key1),
),
_Stateful(
child: Text('Text2', textDirection: TextDirection.ltr, key: key2),
onElementRebuild: (StatefulElement element) {
// We don't want noise to override the result;
expect(rebuiltKeyOfSecondChildBeforeLayout, isNull);
final statefulWidget = element.widget as _Stateful;
rebuiltKeyOfSecondChildBeforeLayout = statefulWidget.child.key;
},
),
],
);
},
),
);
// Result will be written during first build and need to clear it to remove
// noise.
rebuiltKeyOfSecondChildBeforeLayout = null;
final _StatefulState state = tester.firstState(find.byType(_Stateful).at(1));
state.rebuild();
// Reorders the items
await tester.pumpWidget(
LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
return Column(
children: <Widget>[
_Stateful(
child: Text('Text2', textDirection: TextDirection.ltr, key: key2),
onElementRebuild: (StatefulElement element) {
// The widget is only built once.
expect(rebuiltKeyOfSecondChildBeforeLayout, isNull);
// We don't want noise to override the result;
expect(rebuiltKeyOfFirstChildAfterLayout, isNull);
final statefulWidget = element.widget as _Stateful;
rebuiltKeyOfFirstChildAfterLayout = statefulWidget.child.key;
},
),
_Stateful(
child: Text('Text1', textDirection: TextDirection.ltr, key: key1),
onElementRebuild: (StatefulElement element) {
// The widget is only built once.
expect(rebuiltKeyOfSecondChildBeforeLayout, isNull);
// We don't want noise to override the result;
expect(rebuiltKeyOfSecondChildAfterLayout, isNull);
final statefulWidget = element.widget as _Stateful;
rebuiltKeyOfSecondChildAfterLayout = statefulWidget.child.key;
},
),
],
);
},
),
);
expect(rebuiltKeyOfSecondChildBeforeLayout, isNull);
expect(rebuiltKeyOfFirstChildAfterLayout, key2);
expect(rebuiltKeyOfSecondChildAfterLayout, key1);
},
);
testWidgets(
'GlobalKey correct case 4 - can deal with early rebuild in layoutbuilder - move forward',
(WidgetTester tester) async {
const Key key1 = GlobalObjectKey('Text1');
const Key key2 = GlobalObjectKey('Text2');
const Key key3 = GlobalObjectKey('Text3');
Key? rebuiltKeyOfSecondChildBeforeLayout;
Key? rebuiltKeyOfSecondChildAfterLayout;
Key? rebuiltKeyOfThirdChildAfterLayout;
await tester.pumpWidget(
LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
return Column(
children: <Widget>[
const _Stateful(
child: Text('Text1', textDirection: TextDirection.ltr, key: key1),
),
_Stateful(
child: const Text('Text2', textDirection: TextDirection.ltr, key: key2),
onElementRebuild: (StatefulElement element) {
// We don't want noise to override the result;
expect(rebuiltKeyOfSecondChildBeforeLayout, isNull);
final statefulWidget = element.widget as _Stateful;
rebuiltKeyOfSecondChildBeforeLayout = statefulWidget.child.key;
},
),
const _Stateful(
child: Text('Text3', textDirection: TextDirection.ltr, key: key3),
),
],
);
},
),
);
// Result will be written during first build and need to clear it to remove
// noise.
rebuiltKeyOfSecondChildBeforeLayout = null;
final _StatefulState state = tester.firstState(find.byType(_Stateful).at(1));
state.rebuild();
// Reorders the items
await tester.pumpWidget(
LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
return Column(
children: <Widget>[
const _Stateful(
child: Text('Text1', textDirection: TextDirection.ltr, key: key1),
),
_Stateful(
child: const Text('Text3', textDirection: TextDirection.ltr, key: key3),
onElementRebuild: (StatefulElement element) {
// The widget is only built once.
expect(rebuiltKeyOfSecondChildBeforeLayout, isNull);
// We don't want noise to override the result;
expect(rebuiltKeyOfSecondChildAfterLayout, isNull);
final statefulWidget = element.widget as _Stateful;
rebuiltKeyOfSecondChildAfterLayout = statefulWidget.child.key;
},
),
_Stateful(
child: const Text('Text2', textDirection: TextDirection.ltr, key: key2),
onElementRebuild: (StatefulElement element) {
// The widget is only built once.
expect(rebuiltKeyOfSecondChildBeforeLayout, isNull);
// We don't want noise to override the result;
expect(rebuiltKeyOfThirdChildAfterLayout, isNull);
final statefulWidget = element.widget as _Stateful;
rebuiltKeyOfThirdChildAfterLayout = statefulWidget.child.key;
},
),
],
);
},
),
);
expect(rebuiltKeyOfSecondChildBeforeLayout, isNull);
expect(rebuiltKeyOfSecondChildAfterLayout, key3);
expect(rebuiltKeyOfThirdChildAfterLayout, key2);
},
);
testWidgets(
'GlobalKey correct case 5 - can deal with early rebuild in layoutbuilder - only one global key',
(WidgetTester tester) async {
const Key key1 = GlobalObjectKey('Text1');
Key? rebuiltKeyOfSecondChildBeforeLayout;
Key? rebuiltKeyOfThirdChildAfterLayout;
await tester.pumpWidget(
LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
return Column(
children: <Widget>[
const _Stateful(child: Text('Text1', textDirection: TextDirection.ltr)),
_Stateful(
child: const Text('Text2', textDirection: TextDirection.ltr, key: key1),
onElementRebuild: (StatefulElement element) {
// We don't want noise to override the result;
expect(rebuiltKeyOfSecondChildBeforeLayout, isNull);
final statefulWidget = element.widget as _Stateful;
rebuiltKeyOfSecondChildBeforeLayout = statefulWidget.child.key;
},
),
const _Stateful(child: Text('Text3', textDirection: TextDirection.ltr)),
],
);
},
),
);
// Result will be written during first build and need to clear it to remove
// noise.
rebuiltKeyOfSecondChildBeforeLayout = null;
final _StatefulState state = tester.firstState(find.byType(_Stateful).at(1));
state.rebuild();
// Reorders the items
await tester.pumpWidget(
LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraints) {
return Column(
children: <Widget>[
const _Stateful(child: Text('Text1', textDirection: TextDirection.ltr)),
_Stateful(
child: const Text('Text3', textDirection: TextDirection.ltr),
onElementRebuild: (StatefulElement element) {
// The widget is only built once.
expect(rebuiltKeyOfSecondChildBeforeLayout, isNull);
},
),
_Stateful(
child: const Text('Text2', textDirection: TextDirection.ltr, key: key1),
onElementRebuild: (StatefulElement element) {
// The widget is only built once.
expect(rebuiltKeyOfSecondChildBeforeLayout, isNull);
// We don't want noise to override the result;
expect(rebuiltKeyOfThirdChildAfterLayout, isNull);
final statefulWidget = element.widget as _Stateful;
rebuiltKeyOfThirdChildAfterLayout = statefulWidget.child.key;
},
),
],
);
},
),
);
expect(rebuiltKeyOfSecondChildBeforeLayout, isNull);
expect(rebuiltKeyOfThirdChildAfterLayout, key1);
},
);
testWidgets('GlobalKey duplication 1 - double appearance', (WidgetTester tester) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(
key: const ValueKey<int>(1),
child: SizedBox(key: key),
),
Container(
key: const ValueKey<int>(2),
child: Placeholder(key: key),
),
],
),
);
final dynamic exception = tester.takeException();
expect(exception, isFlutterError);
expect(
exception.toString(),
equalsIgnoringHashCodes(
'Multiple widgets used the same GlobalKey.\n'
'The key [GlobalKey#00000 problematic] was used by multiple widgets. The parents of those widgets were:\n'
'- Container-[<1>]\n'
'- Container-[<2>]\n'
'A GlobalKey can only be specified on one widget at a time in the widget tree.',
),
);
});
testWidgets(
'GlobalKey duplication 2 - splitting and changing type',
experimentalLeakTesting: LeakTesting.settings
.withIgnoredAll(), // leaking by design because of exception
(WidgetTester tester) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: const ValueKey<int>(1)),
Container(key: const ValueKey<int>(2)),
Container(key: key),
],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(
key: const ValueKey<int>(1),
child: SizedBox(key: key),
),
Container(
key: const ValueKey<int>(2),
child: Placeholder(key: key),
),
],
),
);
final dynamic exception = tester.takeException();
expect(exception, isFlutterError);
expect(
exception.toString(),
equalsIgnoringHashCodes(
'Multiple widgets used the same GlobalKey.\n'
'The key [GlobalKey#00000 problematic] was used by multiple widgets. The parents of those widgets were:\n'
'- Container-[<1>]\n'
'- Container-[<2>]\n'
'A GlobalKey can only be specified on one widget at a time in the widget tree.',
),
);
},
);
testWidgets(
'GlobalKey duplication 3 - splitting and changing type',
experimentalLeakTesting: LeakTesting.settings
.withIgnoredAll(), // leaking by design because of exception
(WidgetTester tester) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[Container(key: key)],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
SizedBox(key: key),
Placeholder(key: key),
],
),
);
final dynamic exception = tester.takeException();
expect(exception, isFlutterError);
expect(
exception.toString(),
equalsIgnoringHashCodes(
'Duplicate keys found.\n'
'If multiple keyed widgets exist as children of another widget, they must have unique keys.\n'
'Stack(alignment: AlignmentDirectional.topStart, textDirection: ltr, fit: loose) has multiple children with key [GlobalKey#00000 problematic].',
),
);
},
);
testWidgets(
'GlobalKey duplication 4 - splitting and half changing type',
experimentalLeakTesting: LeakTesting.settings
.withIgnoredAll(), // leaking by design because of exception
(WidgetTester tester) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[Container(key: key)],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: key),
Placeholder(key: key),
],
),
);
final dynamic exception = tester.takeException();
expect(exception, isFlutterError);
expect(
exception.toString(),
equalsIgnoringHashCodes(
'Duplicate keys found.\n'
'If multiple keyed widgets exist as children of another widget, they must have unique keys.\n'
'Stack(alignment: AlignmentDirectional.topStart, textDirection: ltr, fit: loose) has multiple children with key [GlobalKey#00000 problematic].',
),
);
},
);
testWidgets(
'GlobalKey duplication 5 - splitting and half changing type',
experimentalLeakTesting: LeakTesting.settings
.withIgnoredAll(), // leaking by design because of exception
(WidgetTester tester) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[Container(key: key)],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Placeholder(key: key),
Container(key: key),
],
),
);
expect(tester.takeException(), isFlutterError);
},
);
testWidgets(
'GlobalKey duplication 6 - splitting and not changing type',
experimentalLeakTesting: LeakTesting.settings
.withIgnoredAll(), // leaking by design because of exception
(WidgetTester tester) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[Container(key: key)],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: key),
Container(key: key),
],
),
);
expect(tester.takeException(), isFlutterError);
},
);
testWidgets('GlobalKey duplication 7 - appearing later', (WidgetTester tester) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(
key: const ValueKey<int>(1),
child: Container(key: key),
),
Container(key: const ValueKey<int>(2)),
],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(
key: const ValueKey<int>(1),
child: Container(key: key),
),
Container(
key: const ValueKey<int>(2),
child: Container(key: key),
),
],
),
);
expect(tester.takeException(), isFlutterError);
});
testWidgets('GlobalKey duplication 8 - appearing earlier', (WidgetTester tester) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: const ValueKey<int>(1)),
Container(
key: const ValueKey<int>(2),
child: Container(key: key),
),
],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(
key: const ValueKey<int>(1),
child: Container(key: key),
),
Container(
key: const ValueKey<int>(2),
child: Container(key: key),
),
],
),
);
expect(tester.takeException(), isFlutterError);
});
testWidgets('GlobalKey duplication 9 - moving and appearing later', (WidgetTester tester) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(
key: const ValueKey<int>(0),
child: Container(key: key),
),
Container(key: const ValueKey<int>(1)),
Container(key: const ValueKey<int>(2)),
],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: const ValueKey<int>(0)),
Container(
key: const ValueKey<int>(1),
child: Container(key: key),
),
Container(
key: const ValueKey<int>(2),
child: Container(key: key),
),
],
),
);
expect(tester.takeException(), isFlutterError);
});
testWidgets('GlobalKey duplication 10 - moving and appearing earlier', (
WidgetTester tester,
) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: const ValueKey<int>(1)),
Container(key: const ValueKey<int>(2)),
Container(
key: const ValueKey<int>(3),
child: Container(key: key),
),
],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(
key: const ValueKey<int>(1),
child: Container(key: key),
),
Container(
key: const ValueKey<int>(2),
child: Container(key: key),
),
Container(key: const ValueKey<int>(3)),
],
),
);
expect(tester.takeException(), isFlutterError);
});
testWidgets('GlobalKey duplication 11 - double sibling appearance', (WidgetTester tester) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: key),
Container(key: key),
],
),
);
expect(tester.takeException(), isFlutterError);
});
testWidgets('GlobalKey duplication 12 - all kinds of badness at once', (
WidgetTester tester,
) async {
final Key key1 = GlobalKey(debugLabel: 'problematic');
final Key key2 = GlobalKey(debugLabel: 'problematic'); // intentionally the same label
final Key key3 = GlobalKey(debugLabel: 'also problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: key1),
Container(key: key1),
Container(key: key2),
Container(key: key1),
Container(key: key1),
Container(key: key2),
Container(key: key1),
Container(key: key1),
Row(
children: <Widget>[
Container(key: key1),
Container(key: key1),
Container(key: key2),
Container(key: key2),
Container(key: key2),
Container(key: key3),
Container(key: key2),
],
),
Row(
children: <Widget>[
Container(key: key1),
Container(key: key1),
Container(key: key3),
],
),
Container(key: key3),
],
),
);
final dynamic exception = tester.takeException();
expect(exception, isFlutterError);
expect(
exception.toString(),
equalsIgnoringHashCodes(
'Duplicate keys found.\n'
'If multiple keyed widgets exist as children of another widget, they must have unique keys.\n'
'Stack(alignment: AlignmentDirectional.topStart, textDirection: ltr, fit: loose) has multiple children with key [GlobalKey#00000 problematic].',
),
);
});
testWidgets(
'GlobalKey duplication 13 - all kinds of badness at once',
experimentalLeakTesting: LeakTesting.settings
.withIgnoredAll(), // leaking by design because of exception
(WidgetTester tester) async {
final Key key1 = GlobalKey(debugLabel: 'problematic');
final Key key2 = GlobalKey(debugLabel: 'problematic'); // intentionally the same label
final Key key3 = GlobalKey(debugLabel: 'also problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: key1),
Container(key: key2),
Container(key: key3),
],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: key1),
Container(key: key1),
Container(key: key2),
Container(key: key1),
Container(key: key1),
Container(key: key2),
Container(key: key1),
Container(key: key1),
Row(
children: <Widget>[
Container(key: key1),
Container(key: key1),
Container(key: key2),
Container(key: key2),
Container(key: key2),
Container(key: key3),
Container(key: key2),
],
),
Row(
children: <Widget>[
Container(key: key1),
Container(key: key1),
Container(key: key3),
],
),
Container(key: key3),
],
),
);
expect(tester.takeException(), isFlutterError);
},
);
testWidgets('GlobalKey duplication 14 - moving during build - before', (
WidgetTester tester,
) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: key),
Container(key: const ValueKey<int>(0)),
Container(key: const ValueKey<int>(1)),
],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: const ValueKey<int>(0)),
Container(
key: const ValueKey<int>(1),
child: Container(key: key),
),
],
),
);
});
testWidgets('GlobalKey duplication 15 - duplicating during build - before', (
WidgetTester tester,
) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: key),
Container(key: const ValueKey<int>(0)),
Container(key: const ValueKey<int>(1)),
],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: key),
Container(key: const ValueKey<int>(0)),
Container(
key: const ValueKey<int>(1),
child: Container(key: key),
),
],
),
);
expect(tester.takeException(), isFlutterError);
});
testWidgets('GlobalKey duplication 16 - moving during build - after', (
WidgetTester tester,
) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: const ValueKey<int>(0)),
Container(key: const ValueKey<int>(1)),
Container(key: key),
],
),
);
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: const ValueKey<int>(0)),
Container(
key: const ValueKey<int>(1),
child: Container(key: key),
),
],
),
);
});
testWidgets('GlobalKey duplication 17 - duplicating during build - after', (
WidgetTester tester,
) async {
final Key key = GlobalKey(debugLabel: 'problematic');
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: const ValueKey<int>(0)),
Container(key: const ValueKey<int>(1)),
Container(key: key),
],
),
);
var count = 0;
final FlutterExceptionHandler? oldHandler = FlutterError.onError;
FlutterError.onError = (FlutterErrorDetails details) {
expect(details.exception, isFlutterError);
count += 1;
};
await tester.pumpWidget(
Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
Container(key: const ValueKey<int>(0)),
Container(
key: const ValueKey<int>(1),
child: Container(key: key),
),
Container(key: key),
],
),
);
FlutterError.onError = oldHandler;
expect(count, 1);
});
testWidgets('GlobalKey duplication 18 - subtree build duplicate key with same type', (
WidgetTester tester,
) async {
final Key key = GlobalKey(debugLabel: 'problematic');
final stack = Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
const SwapKeyWidget(childKey: ValueKey<int>(0)),
Container(key: const ValueKey<int>(1)),
Container(key: key),
],
);
await tester.pumpWidget(stack);
final SwapKeyWidgetState state = tester.state(find.byType(SwapKeyWidget));
state.swapKey(key);
await tester.pump();
final dynamic exception = tester.takeException();
expect(exception, isFlutterError);
expect(
exception.toString(),
equalsIgnoringHashCodes(
'Duplicate GlobalKey detected in widget tree.\n'
'The following GlobalKey was specified multiple times in the widget tree. This will lead '
'to parts of the widget tree being truncated unexpectedly, because the second time a key is seen, the '
'previous instance is moved to the new location. The key was:\n'
'- [GlobalKey#00000 problematic]\n'
'This was determined by noticing that after the widget with the above global key was '
'moved out of its previous parent, that previous parent never updated during this frame, meaning that '
'it either did not update at all or updated before the widget was moved, in either case implying that '
'it still thinks that it should have a child with that global key.\n'
'The specific parent that did not update after having one or more children forcibly '
'removed due to GlobalKey reparenting is:\n'
'- Stack(alignment: AlignmentDirectional.topStart, textDirection: ltr, fit: loose, '
'renderObject: RenderStack#00000)\n'
'A GlobalKey can only be specified on one widget at a time in the widget tree.',
),
);
});
testWidgets('GlobalKey duplication 19 - subtree build duplicate key with different types', (
WidgetTester tester,
) async {
final Key key = GlobalKey(debugLabel: 'problematic');
final stack = Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
const SwapKeyWidget(childKey: ValueKey<int>(0)),
Container(key: const ValueKey<int>(1)),
ColoredBox(
color: _green,