| import 'dart:typed_data' show Uint8List; |
| import 'dart:ui' as ui show instantiateImageCodec, Codec; |
| |
| import 'package:flutter_test/flutter_test.dart'; |
| import 'package:flutter/widgets.dart'; |
| import 'package:flutter/painting.dart'; |
| import 'package:flutter/foundation.dart'; |
| import 'package:flutter/services.dart'; |
| |
| import '../painting/image_data.dart'; |
| |
| class PaintingBindingSpy extends BindingBase with ServicesBinding, PaintingBinding { |
| int counter = 0; |
| int get instantiateImageCodecCalledCount => counter; |
| |
| @override |
| Future<ui.Codec> instantiateImageCodec(Uint8List list) { |
| counter++; |
| return ui.instantiateImageCodec(list, decodedCacheRatioCap: decodedCacheRatioCap); |
| } |
| |
| @override |
| void initLicenses() { |
| // Do not include any licenses, because we're a test, and the LICENSE file |
| // doesn't get generated for tests. |
| } |
| } |
| |
| void main() { |
| final PaintingBindingSpy binding = PaintingBindingSpy(); |
| |
| test('decodedCacheRatio', () async { |
| // final PaintingBinding binding = PaintingBinding.instance; |
| // Has default value. |
| expect(binding.decodedCacheRatioCap, isNot(null)); |
| |
| // Can be set. |
| binding.decodedCacheRatioCap = 1.0; |
| expect(binding.decodedCacheRatioCap, 1.0); |
| }); |
| |
| test('instantiateImageCodec used for loading images', () async { |
| expect(binding.instantiateImageCodecCalledCount, 0); |
| |
| final Uint8List bytes = Uint8List.fromList(kTransparentImage); |
| final MemoryImage memoryImage = MemoryImage(bytes); |
| memoryImage.load(memoryImage); |
| expect(binding.instantiateImageCodecCalledCount, 1); |
| }); |
| } |