1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
// 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/src/rendering/sliver.dart';
import 'package:flutter/src/widgets/basic.dart';
import 'package:flutter/src/widgets/framework.dart';
import 'package:flutter/src/widgets/layout_builder.dart';
import 'package:flutter/src/widgets/sliver_layout_builder.dart';
import 'package:flutter/src/widgets/scroll_view.dart';
import 'package:flutter_test/flutter_test.dart';
class Wrapper extends StatelessWidget {
const Wrapper({
Key key,
@required this.child,
}) : assert(child != null),
super(key: key);
final Widget child;
@override
Widget build(BuildContext context) => child;
}
void main() {
testWidgets('Moving a global key from another LayoutBuilder at layout time', (WidgetTester tester) async {
final GlobalKey victimKey = GlobalKey();
await tester.pumpWidget(Row(
textDirection: TextDirection.ltr,
children: <Widget>[
Wrapper(
child: LayoutBuilder(builder: (BuildContext context, BoxConstraints constraints) {
return const SizedBox();
}),
),
Wrapper(
child: Wrapper(
child: LayoutBuilder(builder: (BuildContext context, BoxConstraints constraints) {
return Wrapper(
child: SizedBox(key: victimKey),
);
}),
),
),
],
));
await tester.pumpWidget(Row(
textDirection: TextDirection.ltr,
children: <Widget>[
Wrapper(
child: LayoutBuilder(builder: (BuildContext context, BoxConstraints constraints) {
return Wrapper(
child: SizedBox(key: victimKey),
);
}),
),
Wrapper(
child: Wrapper(
child: LayoutBuilder(builder: (BuildContext context, BoxConstraints constraints) {
return const SizedBox();
}),
),
),
],
));
expect(tester.takeException(), null);
});
testWidgets('Moving a global key from another SliverLayoutBuilder at layout time', (WidgetTester tester) async {
final GlobalKey victimKey1 = GlobalKey();
final GlobalKey victimKey2 = GlobalKey();
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: CustomScrollView(
slivers: <Widget>[
SliverLayoutBuilder(
builder: (BuildContext context, SliverConstraints constraint) {
return SliverPadding(key: victimKey1, padding: const EdgeInsets.fromLTRB(1, 2, 3, 4));
},
),
SliverLayoutBuilder(
builder: (BuildContext context, SliverConstraints constraint) {
return SliverPadding(key: victimKey2, padding: const EdgeInsets.fromLTRB(5, 7, 11, 13));
},
),
SliverLayoutBuilder(
builder: (BuildContext context, SliverConstraints constraint) {
return const SliverPadding(padding: EdgeInsets.fromLTRB(5, 7, 11, 13));
},
),
],
),
),
);
await tester.pumpWidget(
Directionality(
textDirection: TextDirection.ltr,
child: CustomScrollView(
slivers: <Widget>[
SliverLayoutBuilder(
builder: (BuildContext context, SliverConstraints constraint) {
return SliverPadding(key: victimKey2, padding: const EdgeInsets.fromLTRB(1, 2, 3, 4));
},
),
SliverLayoutBuilder(
builder: (BuildContext context, SliverConstraints constraint) {
return const SliverPadding(padding: EdgeInsets.fromLTRB(5, 7, 11, 13));
},
),
SliverLayoutBuilder(
builder: (BuildContext context, SliverConstraints constraint) {
return SliverPadding(key: victimKey1, padding: const EdgeInsets.fromLTRB(5, 7, 11, 13));
},
),
],
),
),
);
expect(tester.takeException(), null);
});
}