Files
flutter-go/packages/flutter_web/test/widgets/stateful_component_test.dart
2019-08-13 20:38:46 +08:00

63 lines
2.0 KiB
Dart

// Copyright 2015 The Chromium 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_web_test/flutter_web_test.dart';
import 'package:flutter_web/rendering.dart';
import 'package:flutter_web/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 is RenderDecoratedBox, isTrue);
final RenderDecoratedBox renderObject = element.renderObject;
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(FlipWidget(
key: const Key('rebuild test'),
left: TestBuildCounter(),
right: const DecoratedBox(decoration: kBoxDecorationB)));
expect(TestBuildCounter.buildCount, equals(1));
flipStatefulWidget(tester);
await tester.pump();
expect(TestBuildCounter.buildCount, equals(1));
});
}