flutter/examples/api/test/widgets/implicit_animations/animated_container.0_test.dart
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---------

Co-authored-by: Kate Lovett <katelovett@google.com>
Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
2024-12-19 20:06:21 +00:00

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1.8 KiB
Dart

// 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/material.dart';
import 'package:flutter_api_samples/widgets/implicit_animations/animated_container.0.dart'
as example;
import 'package:flutter_test/flutter_test.dart';
void main() {
testWidgets('AnimatedContainer updates on tap', (WidgetTester tester) async {
await tester.pumpWidget(const example.AnimatedContainerExampleApp());
Container container = tester.widget(
find.ancestor(of: find.byType(AnimatedContainer), matching: find.byType(Container)),
);
expect((container.decoration! as BoxDecoration).color, equals(Colors.blue));
expect(container.constraints, equals(const BoxConstraints.tightFor(width: 100, height: 200)));
expect(container.alignment, equals(Alignment.topCenter));
await tester.tap(find.byType(FlutterLogo));
await tester.pump();
container = tester.widget(
find.ancestor(of: find.byType(AnimatedContainer), matching: find.byType(Container)),
);
expect((container.decoration! as BoxDecoration).color, equals(Colors.blue));
expect(container.constraints, equals(const BoxConstraints.tightFor(width: 100, height: 200)));
expect(container.alignment, equals(Alignment.topCenter));
// Advance animation to the end by the 2-second duration specified in
// the example app.
await tester.pump(const Duration(seconds: 2));
container = tester.widget(
find.ancestor(of: find.byType(AnimatedContainer), matching: find.byType(Container)),
);
expect((container.decoration! as BoxDecoration).color, equals(Colors.red));
expect(container.constraints, equals(const BoxConstraints.tightFor(width: 200, height: 100)));
expect(container.alignment, equals(Alignment.center));
});
}