1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
// 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/painting.dart';
import 'package:flutter/scheduler.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
test('PaintingBinding with memory pressure before initInstances', () {
// Observed in devicelab: the device sends a memory pressure event to us
// after PaintingBinding has been created but before initInstances called,
// meaning the imageCache member is still null.
final PaintingBinding binding = TestPaintingBinding();
expect(binding.imageCache, null);
binding.handleMemoryPressure();
expect(binding.imageCache, null);
binding.initInstances();
expect(binding.imageCache, isNotNull);
expect(binding.imageCache.currentSize, 0);
});
}
class TestBindingBase implements BindingBase {
@override
void initInstances() {}
@override
void initServiceExtensions() {}
@override
Future<void> lockEvents(Future<void> Function() callback) async {}
@override
bool get locked => throw UnimplementedError();
@override
Future<void> performReassemble() {
throw UnimplementedError();
}
@override
void postEvent(String eventKind, Map<String, dynamic> eventData) {}
@override
Future<void> reassembleApplication() {
throw UnimplementedError();
}
@override
void registerBoolServiceExtension({String name, AsyncValueGetter<bool> getter, AsyncValueSetter<bool> setter}) {}
@override
void registerNumericServiceExtension({String name, AsyncValueGetter<double> getter, AsyncValueSetter<double> setter}) {}
@override
void registerServiceExtension({String name, ServiceExtensionCallback callback}) {}
@override
void registerSignalServiceExtension({String name, AsyncCallback callback}) {}
@override
void registerStringServiceExtension({String name, AsyncValueGetter<String> getter, AsyncValueSetter<String> setter}) {}
@override
void unlocked() {}
@override
ui.Window get window => TestWindow(window: ui.window);
}
class TestPaintingBinding extends TestBindingBase with SchedulerBinding, ServicesBinding, PaintingBinding {}