146 lines
3.6 KiB
Dart
146 lines
3.6 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:ui' as ui;
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import 'package:flutter/foundation.dart';
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import 'package:flutter/painting.dart';
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import 'package:flutter/scheduler.dart';
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import 'package:flutter/services.dart';
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import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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Future<void> main() async {
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final ui.Image image = await createTestImage();
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testWidgets('didHaveMemoryPressure clears imageCache', (WidgetTester tester) async {
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imageCache.putIfAbsent(
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1,
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() => OneFrameImageStreamCompleter(Future<ImageInfo>.value(ImageInfo(image: image))),
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);
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await tester.idle();
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expect(imageCache.currentSize, 1);
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final ByteData message = const JSONMessageCodec().encodeMessage(<String, dynamic>{
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'type': 'memoryPressure',
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})!;
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await tester.binding.defaultBinaryMessenger.handlePlatformMessage(
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'flutter/system',
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message,
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(_) {},
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);
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expect(imageCache.currentSize, 0);
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});
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test('evict clears live references', () async {
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final binding = TestPaintingBinding();
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expect(binding.imageCache.clearCount, 0);
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expect(binding.imageCache.liveClearCount, 0);
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binding.evict('/path/to/asset.png');
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expect(binding.imageCache.clearCount, 1);
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expect(binding.imageCache.liveClearCount, 1);
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});
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test('ShaderWarmUp is null by default', () {
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expect(PaintingBinding.shaderWarmUp, null);
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});
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}
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class TestBindingBase implements BindingBase {
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@override
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void initInstances() {}
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@override
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bool debugCheckZone(String entryPoint) {
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return true;
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}
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@override
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void initServiceExtensions() {}
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@override
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Future<void> lockEvents(Future<void> Function() callback) async {}
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@override
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bool get locked => throw UnimplementedError();
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@override
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Future<void> performReassemble() {
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throw UnimplementedError();
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}
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@override
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void postEvent(String eventKind, Map<String, dynamic> eventData) {}
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@override
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Future<void> reassembleApplication() {
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throw UnimplementedError();
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}
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@override
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void registerBoolServiceExtension({
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required String name,
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required AsyncValueGetter<bool> getter,
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required AsyncValueSetter<bool> setter,
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}) {}
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@override
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void registerNumericServiceExtension({
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required String name,
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required AsyncValueGetter<double> getter,
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required AsyncValueSetter<double> setter,
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}) {}
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@override
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void registerServiceExtension({
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required String name,
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required ServiceExtensionCallback callback,
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}) {}
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@override
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void registerSignalServiceExtension({required String name, required AsyncCallback callback}) {}
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@override
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void registerStringServiceExtension({
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required String name,
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required AsyncValueGetter<String> getter,
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required AsyncValueSetter<String> setter,
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}) {}
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@override
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void unlocked() {}
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@override
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ui.SingletonFlutterWindow get window => throw UnimplementedError();
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@override
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ui.PlatformDispatcher get platformDispatcher => throw UnimplementedError();
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}
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class TestPaintingBinding extends TestBindingBase
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with SchedulerBinding, ServicesBinding, PaintingBinding {
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@override
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final FakeImageCache imageCache = FakeImageCache();
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@override
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ImageCache createImageCache() => imageCache;
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}
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class FakeImageCache extends ImageCache {
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int clearCount = 0;
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int liveClearCount = 0;
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@override
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void clear() {
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clearCount += 1;
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super.clear();
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}
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@override
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void clearLiveImages() {
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liveClearCount += 1;
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super.clearLiveImages();
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}
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}
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