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
// 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_test/flutter_test.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/widgets.dart';
import 'test_widgets.dart';
void main() {
testWidgets('Stateful widget smoke test', (WidgetTester tester) async {
void checkTree(BoxDecoration expectedDecoration) {
final SingleChildRenderObjectElement element = tester.element(
find.byElementPredicate((Element element) => element is SingleChildRenderObjectElement)
);
expect(element, isNotNull);
expect(element.renderObject, isA<RenderDecoratedBox>());
final RenderDecoratedBox renderObject = element.renderObject as RenderDecoratedBox;
expect(renderObject.decoration, equals(expectedDecoration));
}
await tester.pumpWidget(
const FlipWidget(
left: DecoratedBox(decoration: kBoxDecorationA),
right: DecoratedBox(decoration: kBoxDecorationB),
),
);
checkTree(kBoxDecorationA);
await tester.pumpWidget(
const FlipWidget(
left: DecoratedBox(decoration: kBoxDecorationB),
right: DecoratedBox(decoration: kBoxDecorationA),
),
);
checkTree(kBoxDecorationB);
flipStatefulWidget(tester);
await tester.pump();
checkTree(kBoxDecorationA);
await tester.pumpWidget(
const FlipWidget(
left: DecoratedBox(decoration: kBoxDecorationA),
right: DecoratedBox(decoration: kBoxDecorationB),
),
);
checkTree(kBoxDecorationB);
});
testWidgets("Don't rebuild subwidgets", (WidgetTester tester) async {
await tester.pumpWidget(
const FlipWidget(
key: Key('rebuild test'),
left: TestBuildCounter(),
right: DecoratedBox(decoration: kBoxDecorationB),
),
);
expect(TestBuildCounter.buildCount, equals(1));
flipStatefulWidget(tester);
await tester.pump();
expect(TestBuildCounter.buildCount, equals(1));
});
}