// 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))); }); }