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65 lines
2.4 KiB
65 lines
2.4 KiB
2 years ago
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// Copyright 2023 The Flutter team. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:animations/src/basics/basics.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_test/flutter_test.dart';
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Widget createAnimatedBuilderDemoScreen() => const MaterialApp(
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home: AnimatedBuilderDemo(),
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);
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void main() {
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group('AnimatedBuilder Tests', () {
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testWidgets('AnimatedBuilder changes button color', (tester) async {
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await tester.pumpWidget(createAnimatedBuilderDemoScreen());
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// Get the initial color of the button.
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ElevatedButton button = tester.widget(find.byType(ElevatedButton));
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MaterialStateProperty<Color?>? initialColor =
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button.style!.backgroundColor;
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// Tap the button.
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await tester.tap(find.byType(ElevatedButton));
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await tester.pumpAndSettle();
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// Get the updated color of the button.
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button = tester.widget(find.byType(ElevatedButton));
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MaterialStateProperty<Color?>? updatedColor =
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button.style!.backgroundColor;
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// Check if the color has changed.
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expect(initialColor, isNot(updatedColor));
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});
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testWidgets('AnimatedBuilder animates button color', (tester) async {
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await tester.pumpWidget(createAnimatedBuilderDemoScreen());
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// Get the initial color of the button.
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ElevatedButton button = tester.widget(find.byType(ElevatedButton));
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MaterialStateProperty<Color?>? initialColor =
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button.style!.backgroundColor;
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// Tap the button to trigger the animation but don't wait for it to finish.
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await tester.tap(find.byType(ElevatedButton));
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await tester.pump();
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await tester.pump(const Duration(milliseconds: 400));
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// Check that the color has changed but not to the final color.
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button = tester.widget(find.byType(ElevatedButton));
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MaterialStateProperty<Color?>? changedColor =
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button.style!.backgroundColor;
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expect(initialColor, isNot(changedColor));
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// Wait for the animation to finish.
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await tester.pump(const Duration(milliseconds: 400));
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// Check that the color has changed to the final color.
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button = tester.widget(find.byType(ElevatedButton));
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MaterialStateProperty<Color?>? finalColor = button.style!.backgroundColor;
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expect(changedColor, isNot(finalColor));
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});
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});
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}
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