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
// 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 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
const Key key = Key('testContainer');
const Color trueColor = Colors.red;
const Color falseColor = Colors.green;
/// Mock widget which plays the role of a button -- it can emit notifications
/// that [MaterialState] values are now in or out of play.
class _InnerWidget extends StatefulWidget {
const _InnerWidget({required this.onValueChanged, required this.controller});
final ValueChanged<bool> onValueChanged;
final StreamController<bool> controller;
@override
_InnerWidgetState createState() => _InnerWidgetState();
}
class _InnerWidgetState extends State<_InnerWidget> {
@override
void initState() {
super.initState();
widget.controller.stream.listen((bool val) => widget.onValueChanged(val));
}
@override
Widget build(BuildContext context) => Container();
}
class _MyWidget extends StatefulWidget {
const _MyWidget({
required this.controller,
required this.evaluator,
required this.materialState,
});
/// Wrapper around `MaterialStateMixin.isPressed/isHovered/isFocused/etc`.
final bool Function(_MyWidgetState state) evaluator;
/// Stream passed down to the child [_InnerWidget] to begin the process.
/// This plays the role of an actual user interaction in the wild, but allows
/// us to engage the system without mocking pointers/hovers etc.
final StreamController<bool> controller;
/// The value we're watching in the given test.
final MaterialState materialState;
@override
State createState() => _MyWidgetState();
}
class _MyWidgetState extends State<_MyWidget> with MaterialStateMixin {
@override
Widget build(BuildContext context) {
return ColoredBox(
key: key,
color: widget.evaluator(this) ? trueColor : falseColor,
child: _InnerWidget(
onValueChanged: updateMaterialState(widget.materialState),
controller: widget.controller,
),
);
}
}
void main() {
Future<void> verify(WidgetTester tester, Widget widget, StreamController<bool> controller,) async {
await tester.pumpWidget(MaterialApp(home: Scaffold(body: widget)));
// Set the value to True
controller.sink.add(true);
await tester.pumpAndSettle();
expect(tester.widget<ColoredBox>(find.byKey(key)).color, trueColor);
// Set the value to False
controller.sink.add(false);
await tester.pumpAndSettle();
expect(tester.widget<ColoredBox>(find.byKey(key)).color, falseColor);
}
testWidgets('MaterialState.pressed is tracked', (WidgetTester tester) async {
final StreamController<bool> controller = StreamController<bool>();
final _MyWidget widget = _MyWidget(
controller: controller,
evaluator: (_MyWidgetState state) => state.isPressed,
materialState: MaterialState.pressed,
);
await verify(tester, widget, controller);
});
testWidgets('MaterialState.focused is tracked', (WidgetTester tester) async {
final StreamController<bool> controller = StreamController<bool>();
final _MyWidget widget = _MyWidget(
controller: controller,
evaluator: (_MyWidgetState state) => state.isFocused,
materialState: MaterialState.focused,
);
await verify(tester, widget, controller);
});
testWidgets('MaterialState.hovered is tracked', (WidgetTester tester) async {
final StreamController<bool> controller = StreamController<bool>();
final _MyWidget widget = _MyWidget(
controller: controller,
evaluator: (_MyWidgetState state) => state.isHovered,
materialState: MaterialState.hovered,
);
await verify(tester, widget, controller);
});
testWidgets('MaterialState.disabled is tracked', (WidgetTester tester) async {
final StreamController<bool> controller = StreamController<bool>();
final _MyWidget widget = _MyWidget(
controller: controller,
evaluator: (_MyWidgetState state) => state.isDisabled,
materialState: MaterialState.disabled,
);
await verify(tester, widget, controller);
});
testWidgets('MaterialState.selected is tracked', (WidgetTester tester) async {
final StreamController<bool> controller = StreamController<bool>();
final _MyWidget widget = _MyWidget(
controller: controller,
evaluator: (_MyWidgetState state) => state.isSelected,
materialState: MaterialState.selected,
);
await verify(tester, widget, controller);
});
testWidgets('MaterialState.scrolledUnder is tracked', (WidgetTester tester) async {
final StreamController<bool> controller = StreamController<bool>();
final _MyWidget widget = _MyWidget(
controller: controller,
evaluator: (_MyWidgetState state) => state.isScrolledUnder,
materialState: MaterialState.scrolledUnder,
);
await verify(tester, widget, controller);
});
testWidgets('MaterialState.dragged is tracked', (WidgetTester tester) async {
final StreamController<bool> controller = StreamController<bool>();
final _MyWidget widget = _MyWidget(
controller: controller,
evaluator: (_MyWidgetState state) => state.isDragged,
materialState: MaterialState.dragged,
);
await verify(tester, widget, controller);
});
testWidgets('MaterialState.error is tracked', (WidgetTester tester) async {
final StreamController<bool> controller = StreamController<bool>();
final _MyWidget widget = _MyWidget(
controller: controller,
evaluator: (_MyWidgetState state) => state.isErrored,
materialState: MaterialState.error,
);
await verify(tester, widget, controller);
});
}