| // Copyright 2015 The Chromium 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 'dart:ui' show Shader; |
| |
| import 'package:flutter_test/flutter_test.dart'; |
| import 'package:flutter/widgets.dart'; |
| |
| Shader createShader(Rect bounds) { |
| return const LinearGradient( |
| begin: Alignment.topCenter, |
| end: Alignment.bottomCenter, |
| colors: const <Color>[const Color(0x00FFFFFF), const Color(0xFFFFFFFF)], |
| stops: const <double>[0.1, 0.35] |
| ).createShader(bounds); |
| } |
| |
| |
| void main() { |
| testWidgets('Can be constructed', (WidgetTester tester) async { |
| final Widget child = new Container(width: 100.0, height: 100.0); |
| await tester.pumpWidget(new ShaderMask(child: child, shaderCallback: createShader)); |
| }); |
| |
| testWidgets('Bounds rect includes offset', (WidgetTester tester) async { |
| Rect shaderBounds; |
| Shader recordShaderBounds(Rect bounds) { |
| shaderBounds = bounds; |
| return createShader(bounds); |
| } |
| |
| final Widget widget = new Align( |
| alignment: Alignment.center, |
| child: new SizedBox( |
| width: 400.0, |
| height: 400.0, |
| child: new ShaderMask( |
| shaderCallback: recordShaderBounds, |
| child: new Container(width: 100.0, height: 100.0) |
| ), |
| ), |
| ); |
| await tester.pumpWidget(widget); |
| |
| // The shader bounds rectangle should reflect the position of the centered SizedBox. |
| expect(shaderBounds, equals(new Rect.fromLTWH(200.0, 100.0, 400.0, 400.0))); |
| }); |
| } |