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// 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);
}
}