flutter-go/packages/flutter_web/test/widgets/shader_mask_test.dart

// 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 'package:flutter_web_ui/ui.dart' show Shader;

import 'package:flutter_web_test/flutter_web_test.dart';
import 'package:flutter_web/widgets.dart';

Shader createShader(Rect bounds) {
  return const LinearGradient(
      begin: Alignment.topCenter,
      end: Alignment.bottomCenter,
      colors: <Color>[Color(0x00FFFFFF), Color(0xFFFFFFFF)],
      stops: <double>[0.1, 0.35]).createShader(bounds);
}

void main() {
  testWidgets('Can be constructed', (WidgetTester tester) async {
    final Widget child = Container(width: 100.0, height: 100.0);
    await tester
        .pumpWidget(ShaderMask(child: child, shaderCallback: createShader));
  }, skip: true); // TODO(flutter_web): pushShaderMask not implemented yet.

  testWidgets('Bounds rect includes offset', (WidgetTester tester) async {
    Rect shaderBounds;
    Shader recordShaderBounds(Rect bounds) {
      shaderBounds = bounds;
      return createShader(bounds);
    }

    final Widget widget = Align(
      alignment: Alignment.center,
      child: SizedBox(
        width: 400.0,
        height: 400.0,
        child: ShaderMask(
            shaderCallback: recordShaderBounds,
            child: 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(Rect.fromLTWH(200.0, 100.0, 400.0, 400.0)));
  }, skip: true); // TODO(flutter_web): pushShaderMask not implemented yet.
}