// 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 'dart:ui' as ui; import 'package:flutter/foundation.dart'; import 'package:flutter/widgets.dart'; import 'package:flutter_test/flutter_test.dart'; Future<void> main() async { test('ShaderWarmUp', () { final FakeShaderWarmUp shaderWarmUp = FakeShaderWarmUp(); PaintingBinding.shaderWarmUp = shaderWarmUp; debugCaptureShaderWarmUpImage = expectAsync1((ui.Image image) => true); WidgetsFlutterBinding.ensureInitialized(); expect(shaderWarmUp.ranWarmUp, true); }, skip: kIsWeb && !isCanvasKit); // [intended] Testing only for canvasKit } class FakeShaderWarmUp extends ShaderWarmUp { bool ranWarmUp = false; @override Future<bool> warmUpOnCanvas(ui.Canvas canvas) { ranWarmUp = true; return Future<bool>.delayed(Duration.zero, () => true); } }