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Deflake ImageProvider.evict test (#35999)

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Dan Field 2019-07-11 13:09:30 -07:00 committed by GitHub
parent 7ea7f1c62b
commit 735352a8c0
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1 changed files with 11 additions and 3 deletions
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14
packages/flutter/test/painting/image_provider_test.dart
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@ -44,11 +44,19 @@ void main() {
final ImageCache otherCache = ImageCache();
final Uint8List bytes = Uint8List.fromList(kTransparentImage);
final MemoryImage imageProvider = MemoryImage(bytes);
otherCache.putIfAbsent(imageProvider, () => imageProvider.load(imageProvider));
final ImageStreamCompleter cacheStream = otherCache.putIfAbsent(
imageProvider, () => imageProvider.load(imageProvider),
);
final ImageStream stream = imageProvider.resolve(ImageConfiguration.empty);
final Completer<void> completer = Completer<void>();
stream.addListener(ImageStreamListener((ImageInfo info, bool syncCall) => completer.complete()));
await completer.future;
final Completer<void> cacheCompleter = Completer<void>();
stream.addListener(ImageStreamListener((ImageInfo info, bool syncCall) {
completer.complete();
}));
cacheStream.addListener(ImageStreamListener((ImageInfo info, bool syncCall) {
cacheCompleter.complete();
}));
await Future.wait(<Future<void>>[completer.future, cacheCompleter.future]);
expect(otherCache.currentSize, 1);
expect(imageCache.currentSize, 1);