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Pass an async callback to testWidgets. (#33260)

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The dart analyzer fails to warn about missing returns in function expressions due to a bug that has been
fixed but not yet rolled into Flutter (see
https://dart-review.googlesource.com/c/sdk/+/100301).  So it failed to catch that https://github.com/flutter/flutter/pull/33217 accidentally introduced a call to `testWidgets` that passed it a synchronous callback.
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Paul Berry 2019-05-23 10:17:22 -07:00 committed by GitHub
parent 4bc8e9c00e
commit 9a16900ed1
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packages/flutter/test/painting/image_stream_test.dart
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@ -607,7 +607,7 @@ void main() {
await tester.pump(const Duration(milliseconds: 200)); // emit 2nd frame.
});
testWidgets('ImageStreamListener hashCode and equals', (WidgetTester tester) {
testWidgets('ImageStreamListener hashCode and equals', (WidgetTester tester) async {
void handleImage(ImageInfo image, bool synchronousCall) { }
void handleImageDifferently(ImageInfo image, bool synchronousCall) { }
void handleError(dynamic error, StackTrace stackTrace) { }