// 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/transitions/matrix_transition.0.dart' as example; import 'package:flutter_test/flutter_test.dart'; void main() { testWidgets('Shows Flutter logo inside a MatrixTransition', (WidgetTester tester) async { await tester.pumpWidget( const example.MatrixTransitionExampleApp(), ); final Finder transformFinder = find.ancestor( of: find.byType(FlutterLogo), matching: find.byType(MatrixTransition), ); expect(transformFinder, findsOneWidget); }); testWidgets('MatrixTransition animates', (WidgetTester tester) async { await tester.pumpWidget( const example.MatrixTransitionExampleApp(), ); final Finder transformFinder = find.ancestor( of: find.byType(FlutterLogo), matching: find.byType(Transform), ); Transform transformBox = tester.widget(transformFinder); Matrix4 actualTransform = transformBox.transform; // Check initial transform. expect(actualTransform, Matrix4.fromList(<double>[ 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.004, 1.0, ])..transpose()); // Animate half way. await tester.pump(const Duration(seconds: 1)); transformBox = tester.widget(transformFinder); actualTransform = transformBox.transform; // The transform should be updated. expect(actualTransform, isNot(Matrix4.fromList(<double>[ 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.004, 1.0, ])..transpose())); }); }