57 lines
1.8 KiB
Dart
57 lines
1.8 KiB
Dart
// Copyright 2014 The Flutter Authors. 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:flutter/foundation.dart';
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import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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void main() {
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testWidgets('FadeTransition', (WidgetTester tester) async {
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final DebugPrintCallback oldPrint = debugPrint;
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final log = <String>[];
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debugPrint = (String? message, {int? wrapWidth}) {
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log.add(message!);
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};
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debugPrintBuildScope = true;
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final controller = AnimationController(
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vsync: const TestVSync(),
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duration: const Duration(seconds: 2),
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);
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addTearDown(controller.dispose);
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await tester.pumpWidget(FadeTransition(opacity: controller, child: const Placeholder()));
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expect(log, hasLength(2));
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expect(log.last, 'buildScope finished');
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await tester.pump();
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expect(log, hasLength(2));
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controller.forward();
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await tester.pumpAndSettle();
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expect(log, hasLength(2));
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debugPrint = oldPrint;
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debugPrintBuildScope = false;
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});
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// Regression test for https://github.com/flutter/flutter/issues/157312
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testWidgets('No exception when calling markNeedsPaint during opacity changes', (
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WidgetTester tester,
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) async {
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final GlobalKey key = GlobalKey();
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final controller = AnimationController(
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vsync: const TestVSync(),
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value: 1,
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duration: const Duration(seconds: 2),
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);
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addTearDown(controller.dispose);
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await tester.pumpWidget(
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FadeTransition(
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opacity: controller,
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child: Placeholder(key: key),
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),
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);
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controller.value = 0.5;
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key.currentContext?.findRenderObject()?.markNeedsPaint();
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controller.value = 0;
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await tester.pump();
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expect(tester.takeException(), isNull);
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});
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}
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