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57 lines
1.7 KiB
Dart
57 lines
1.7 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/material.dart';
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import 'package:flutter_api_samples/widgets/transitions/matrix_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 Flutter logo inside a MatrixTransition', (WidgetTester tester) async {
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await tester.pumpWidget(
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const example.MatrixTransitionExampleApp(),
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);
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final Finder transformFinder = find.ancestor(
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of: find.byType(FlutterLogo),
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matching: find.byType(MatrixTransition),
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);
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expect(transformFinder, findsOneWidget);
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});
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testWidgets('MatrixTransition animates', (WidgetTester tester) async {
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await tester.pumpWidget(
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const example.MatrixTransitionExampleApp(),
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);
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final Finder transformFinder = find.ancestor(
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of: find.byType(FlutterLogo),
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matching: find.byType(Transform),
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);
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Transform transformBox = tester.widget(transformFinder);
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Matrix4 actualTransform = transformBox.transform;
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// Check initial transform.
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expect(actualTransform, Matrix4.fromList(<double>[
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1.0, 0.0, 0.0, 0.0,
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0.0, 1.0, 0.0, 0.0,
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0.0, 0.0, 1.0, 0.0,
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0.0, 0.0, 0.004, 1.0,
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])..transpose());
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// Animate half way.
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await tester.pump(const Duration(seconds: 1));
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transformBox = tester.widget(transformFinder);
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actualTransform = transformBox.transform;
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// The transform should be updated.
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expect(actualTransform, isNot(Matrix4.fromList(<double>[
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1.0, 0.0, 0.0, 0.0,
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0.0, 1.0, 0.0, 0.0,
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0.0, 0.0, 1.0, 0.0,
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0.0, 0.0, 0.004, 1.0,
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])..transpose()));
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});
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}
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