| // 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:convert'; |
| |
| import 'package:flutter/painting.dart'; |
| import 'package:flutter_test/flutter_test.dart'; |
| |
| import 'common.dart'; |
| |
| void main() { |
| initTimelineTests(); |
| TestWidgetsFlutterBinding.ensureInitialized(); |
| |
| test('Image cache tracing', () async { |
| final TestImageStreamCompleter completer1 = TestImageStreamCompleter(); |
| final TestImageStreamCompleter completer2 = TestImageStreamCompleter(); |
| PaintingBinding.instance.imageCache.putIfAbsent( |
| 'Test', |
| () => completer1, |
| ); |
| PaintingBinding.instance.imageCache.clear(); |
| |
| completer2.testSetImage(ImageInfo(image: await createTestImage())); |
| PaintingBinding.instance.imageCache.putIfAbsent( |
| 'Test2', |
| () => completer2, |
| ); |
| PaintingBinding.instance.imageCache.evict('Test2'); |
| |
| _expectTimelineEvents( |
| await fetchTimelineEvents(), |
| <Map<String, dynamic>>[ |
| <String, dynamic>{ |
| 'name': 'ImageCache.putIfAbsent', |
| 'args': <String, dynamic>{'key': 'Test', 'isolateId': isolateId}, |
| }, |
| <String, dynamic>{ |
| 'name': 'listener', |
| 'args': <String, dynamic>{'isolateId': isolateId}, |
| }, |
| <String, dynamic>{ |
| 'name': 'ImageCache.clear', |
| 'args': <String, dynamic>{ |
| 'pendingImages': 1, |
| 'keepAliveImages': 0, |
| 'liveImages': 1, |
| 'currentSizeInBytes': 0, |
| 'isolateId': isolateId, |
| }, |
| }, |
| <String, dynamic>{ |
| 'name': 'ImageCache.putIfAbsent', |
| 'args': <String, dynamic>{'key': 'Test2', 'isolateId': isolateId}, |
| }, |
| <String, dynamic>{ |
| 'name': 'ImageCache.evict', |
| 'args': <String, dynamic>{'sizeInBytes': 4, 'isolateId': isolateId}, |
| }, |
| ], |
| ); |
| }, skip: isBrowser); // [intended] uses dart:isolate and io. |
| } |
| |
| void _expectTimelineEvents(List<TimelineEvent> events, List<Map<String, dynamic>> expected) { |
| for (final TimelineEvent event in events) { |
| for (int index = 0; index < expected.length; index += 1) { |
| if (expected[index]['name'] == event.json!['name']) { |
| final Map<String, dynamic> expectedArgs = expected[index]['args'] as Map<String, dynamic>; |
| final Map<String, dynamic> args = event.json!['args'] as Map<String, dynamic>; |
| if (_mapsEqual(expectedArgs, args)) { |
| expected.removeAt(index); |
| } |
| } |
| } |
| } |
| if (expected.isNotEmpty) { |
| final String encodedEvents = jsonEncode(events); |
| fail('Timeline did not contain expected events: $expected\nactual: $encodedEvents'); |
| } |
| } |
| |
| bool _mapsEqual(Map<String, dynamic> expectedArgs, Map<String, dynamic> args) { |
| for (final String key in expectedArgs.keys) { |
| if (expectedArgs[key] != args[key]) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| class TestImageStreamCompleter extends ImageStreamCompleter { |
| void testSetImage(ImageInfo image) { |
| setImage(image); |
| } |
| } |