| // 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_align.0.dart' |
| as example; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| void main() { |
| testWidgets('AnimatedAlign animates on tap', (WidgetTester tester) async { |
| await tester.pumpWidget( |
| const example.AnimatedAlignExampleApp(), |
| ); |
| |
| final Finder alignFinder = find.descendant( |
| of: find.byType(AnimatedAlign), |
| matching: find.byType(Align), |
| ); |
| |
| const Alignment beginAlignment = Alignment.bottomLeft; |
| const Alignment endAlignment = Alignment.topRight; |
| |
| Align align = tester.widget(alignFinder); |
| expect(align.alignment, beginAlignment); |
| |
| // Tap on the AnimatedAlignExample to start the forward animation. |
| await tester.tap(find.byType(example.AnimatedAlignExample)); |
| await tester.pump(); |
| |
| align = tester.widget(alignFinder); |
| expect(align.alignment, beginAlignment); |
| |
| // Advance animation to the middle. |
| await tester.pump(example.AnimatedAlignExampleApp.duration ~/ 2); |
| |
| align = tester.widget(alignFinder); |
| expect( |
| align.alignment, |
| Alignment.lerp( |
| beginAlignment, |
| endAlignment, |
| example.AnimatedAlignExampleApp.curve.transform(0.5), |
| ), |
| ); |
| |
| // Advance animation to the end. |
| await tester.pump(example.AnimatedAlignExampleApp.duration ~/ 2); |
| |
| align = tester.widget(alignFinder); |
| expect(align.alignment, endAlignment); |
| |
| // Tap on the AnimatedAlignExample again to start the reverse animation. |
| await tester.tap(find.byType(example.AnimatedAlignExample)); |
| await tester.pump(); |
| |
| align = tester.widget(alignFinder); |
| expect(align.alignment, endAlignment); |
| |
| // Advance animation to the middle. |
| await tester.pump(example.AnimatedAlignExampleApp.duration ~/ 2); |
| |
| align = tester.widget(alignFinder); |
| expect( |
| align.alignment, |
| Alignment.lerp( |
| endAlignment, |
| beginAlignment, |
| example.AnimatedAlignExampleApp.curve.transform(0.5), |
| ), |
| ); |
| |
| // Advance animation to the end. |
| await tester.pump(example.AnimatedAlignExampleApp.duration ~/ 2); |
| |
| align = tester.widget(alignFinder); |
| expect(align.alignment, beginAlignment); |
| }); |
| } |