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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
// 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/material.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
testWidgets('debugCheckHasMaterial control test', (WidgetTester tester) async {
await tester.pumpWidget(const ListTile());
final dynamic exception = tester.takeException();
expect(exception, isFlutterError);
final FlutterError error = exception as FlutterError;
expect(error.diagnostics.length, 5);
expect(error.diagnostics[2].level, DiagnosticLevel.hint);
expect(
error.diagnostics[2].toStringDeep(),
equalsIgnoringHashCodes(
'To introduce a Material widget, you can either directly include\n'
'one, or use a widget that contains Material itself, such as a\n'
'Card, Dialog, Drawer, or Scaffold.\n',
),
);
expect(error.diagnostics[3], isA<DiagnosticsProperty<Element>>());
expect(error.diagnostics[4], isA<DiagnosticsBlock>());
expect(error.toStringDeep(),
'FlutterError\n'
' No Material widget found.\n'
' ListTile widgets require a Material widget ancestor.\n'
' In material design, most widgets are conceptually "printed" on a\n'
" sheet of material. In Flutter's material library, that material\n"
' is represented by the Material widget. It is the Material widget\n'
' that renders ink splashes, for instance. Because of this, many\n'
' material library widgets require that there be a Material widget\n'
' in the tree above them.\n'
' To introduce a Material widget, you can either directly include\n'
' one, or use a widget that contains Material itself, such as a\n'
' Card, Dialog, Drawer, or Scaffold.\n'
' The specific widget that could not find a Material ancestor was:\n'
' ListTile\n'
' The ancestors of this widget were:\n'
' [root]\n'
);
});
testWidgets('debugCheckHasMaterialLocalizations control test', (
WidgetTester tester) async {
await tester.pumpWidget(const BackButton());
final dynamic exception = tester.takeException();
expect(exception, isFlutterError);
final FlutterError error = exception as FlutterError;
expect(error.diagnostics.length, 6);
expect(error.diagnostics[3].level, DiagnosticLevel.hint);
expect(
error.diagnostics[3].toStringDeep(),
equalsIgnoringHashCodes(
'To introduce a MaterialLocalizations, either use a MaterialApp at\n'
'the root of your application to include them automatically, or\n'
'add a Localization widget with a MaterialLocalizations delegate.\n',
),
);
expect(error.diagnostics[4], isA<DiagnosticsProperty<Element>>());
expect(error.diagnostics[5], isA<DiagnosticsBlock>());
expect(error.toStringDeep(),
'FlutterError\n'
' No MaterialLocalizations found.\n'
' BackButton widgets require MaterialLocalizations to be provided\n'
' by a Localizations widget ancestor.\n'
' Localizations are used to generate many different messages,\n'
' labels, and abbreviations which are used by the material library.\n'
' To introduce a MaterialLocalizations, either use a MaterialApp at\n'
' the root of your application to include them automatically, or\n'
' add a Localization widget with a MaterialLocalizations delegate.\n'
' The specific widget that could not find a MaterialLocalizations\n'
' ancestor was:\n'
' BackButton\n'
' The ancestors of this widget were:\n'
' [root]\n'
);
});
testWidgets(
'debugCheckHasScaffold control test', (WidgetTester tester) async {
await tester.pumpWidget(
MaterialApp(
theme: ThemeData(
pageTransitionsTheme: const PageTransitionsTheme(
builders: <TargetPlatform, PageTransitionsBuilder>{
TargetPlatform.android: FadeUpwardsPageTransitionsBuilder(),
},
),
),
home: Builder(
builder: (BuildContext context) {
showBottomSheet<void>(context: context,
builder: (BuildContext context) => Container());
return Container();
}
),
),
);
final dynamic exception = tester.takeException();
expect(exception, isFlutterError);
final FlutterError error = exception as FlutterError;
expect(error.diagnostics.length, 5);
expect(error.diagnostics[2], isA<DiagnosticsProperty<Element>>());
expect(error.diagnostics[3], isA<DiagnosticsBlock>());
expect(error.diagnostics[4].level, DiagnosticLevel.hint);
expect(
error.diagnostics[4].toStringDeep(),
equalsIgnoringHashCodes(
'Typically, the Scaffold widget is introduced by the MaterialApp\n'
'or WidgetsApp widget at the top of your application widget tree.\n',
),
);
expect(error.toStringDeep(), equalsIgnoringHashCodes(
'FlutterError\n'
' No Scaffold widget found.\n'
' Builder widgets require a Scaffold widget ancestor.\n'
' The specific widget that could not find a Scaffold ancestor was:\n'
' Builder\n'
' The ancestors of this widget were:\n'
' Semantics\n'
' Builder\n'
' RepaintBoundary-[GlobalKey#00000]\n'
' IgnorePointer\n'
' AnimatedBuilder\n'
' FadeTransition\n'
' FractionalTranslation\n'
' SlideTransition\n'
' _FadeUpwardsPageTransition\n'
' AnimatedBuilder\n'
' RepaintBoundary\n'
' _FocusMarker\n'
' Semantics\n'
' FocusScope\n'
' PageStorage\n'
' Offstage\n'
' _ModalScopeStatus\n'
' _ModalScope<dynamic>-[LabeledGlobalKey<_ModalScopeState<dynamic>>#00000]\n'
' _EffectiveTickerMode\n'
' TickerMode\n'
' _OverlayEntryWidget-[LabeledGlobalKey<_OverlayEntryWidgetState>#00000]\n'
' _Theatre\n'
' Overlay-[LabeledGlobalKey<OverlayState>#00000]\n'
' _FocusMarker\n'
' Semantics\n'
' FocusScope\n'
' AbsorbPointer\n'
' _PointerListener\n'
' Listener\n'
' Navigator-[GlobalObjectKey<NavigatorState> _WidgetsAppState#00000]\n'
' IconTheme\n'
' IconTheme\n'
' _InheritedCupertinoTheme\n'
' CupertinoTheme\n'
' _InheritedTheme\n'
' Theme\n'
' AnimatedTheme\n'
' Builder\n'
' DefaultTextStyle\n'
' CustomPaint\n'
' Banner\n'
' CheckedModeBanner\n'
' Title\n'
' Directionality\n'
' _LocalizationsScope-[GlobalKey#00000]\n'
' Semantics\n'
' Localizations\n'
' MediaQuery\n'
' _MediaQueryFromWindow\n'
' _FocusMarker\n'
' Focus\n'
' _FocusTraversalGroupMarker\n'
' FocusTraversalGroup\n'
' _ActionsMarker\n'
' Actions\n'
' _ShortcutsMarker\n'
' Semantics\n'
' _FocusMarker\n'
' Focus\n'
' Shortcuts\n'
' WidgetsApp-[GlobalObjectKey _MaterialAppState#00000]\n'
' ScrollConfiguration\n'
' MaterialApp\n'
' [root]\n'
' Typically, the Scaffold widget is introduced by the MaterialApp\n'
' or WidgetsApp widget at the top of your application widget tree.\n',
));
});
}