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This auto-formats all *.dart files in the repository outside of the `engine` subdirectory and enforces that these files stay formatted with a presubmit check. **Reviewers:** Please carefully review all the commits except for the one titled "formatted". The "formatted" commit was auto-generated by running `dev/tools/format.sh -a -f`. The other commits were hand-crafted to prepare the repo for the formatting change. I recommend reviewing the commits one-by-one via the "Commits" tab and avoiding Github's "Files changed" tab as it will likely slow down your browser because of the size of this PR. --------- Co-authored-by: Kate Lovett <katelovett@google.com> Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
62 lines
2.2 KiB
Dart
62 lines
2.2 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 'dart:ui';
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import 'package:flutter/material.dart';
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import 'package:flutter_api_samples/widgets/transitions/fade_transition.0.dart' as example;
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import 'package:flutter_test/flutter_test.dart';
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void main() {
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testWidgets('Shows FlutterLogo inside a FadeTransition', (WidgetTester tester) async {
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await tester.pumpWidget(const example.FadeTransitionExampleApp());
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expect(
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find.ancestor(of: find.byType(FlutterLogo), matching: find.byType(FadeTransition)),
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findsOneWidget,
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);
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});
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testWidgets('FadeTransition animates', (WidgetTester tester) async {
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await tester.pumpWidget(const example.FadeTransitionExampleApp());
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final Finder fadeTransitionFinder = find.ancestor(
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of: find.byType(FlutterLogo),
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matching: find.byType(FadeTransition),
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);
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const double beginOpacity = 0.0;
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const double endOpacity = 1.0;
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FadeTransition fadeTransition = tester.widget(fadeTransitionFinder);
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expect(fadeTransition.opacity.value, equals(beginOpacity));
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// Advance animation to the middle.
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await tester.pump(example.FadeTransitionExampleApp.duration ~/ 2);
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final double t = example.FadeTransitionExampleApp.curve.transform(0.5);
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fadeTransition = tester.widget(fadeTransitionFinder);
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expect(fadeTransition.opacity.value, equals(lerpDouble(beginOpacity, endOpacity, t)));
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// Advance animation to the end.
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await tester.pump(example.FadeTransitionExampleApp.duration ~/ 2);
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fadeTransition = tester.widget(fadeTransitionFinder);
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expect(fadeTransition.opacity.value, equals(endOpacity));
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// Advance animation to the middle.
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await tester.pump(example.FadeTransitionExampleApp.duration ~/ 2);
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fadeTransition = tester.widget(fadeTransitionFinder);
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expect(fadeTransition.opacity.value, equals(lerpDouble(beginOpacity, endOpacity, t)));
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// Advance animation to the end.
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await tester.pump(example.FadeTransitionExampleApp.duration ~/ 2);
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fadeTransition = tester.widget(fadeTransitionFinder);
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expect(fadeTransition.opacity.value, equals(beginOpacity));
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});
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}
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