custom imageBytes not working?

[timrijckaert]

Hi,

I'm trying to return a custom image in my tests. Using the imageBytes property I tried to place my bytes inside, but it seems as thought nothing gets shown on screen.

Is this broken?

void main() {
  testWidgets('should not crash', (WidgetTester tester) async {
    final imageFile = File("/Users/timrijckaert/local_image.png");
    final customImageBytes = imageFile.readAsBytesSync();

    await provideMockedNetworkImages(() async {
      await tester.pumpWidget(
        MaterialApp(
          home: Image.network('https://example.com/image.png'),
        ),
      );
    }, imageBytes: customImageBytes);
    
    await expectLater(find.byType(MaterialApp), matchesGoldenFile("custom_image_bytes.png"));
  });
}

Did something change the way Flutter calls this in tests? I don't see my breakpoint going inside of:

when(response.listen(any)).thenAnswer((Invocation invocation) {
    final void Function(List<int>) onData = invocation.positionalArguments[0];
    final void Function() onDone = invocation.namedArguments[#onDone];
    final void Function(Object, [StackTrace]) onError = invocation.namedArguments[#onError];
    final bool cancelOnError = invocation.namedArguments[#cancelOnError];

    return Stream<List<int>>.fromIterable(<List<int>>[imageBytes])
        .listen(onData, onDone: onDone, onError: onError, cancelOnError: cancelOnError);
  });

My Flutter version

Flutter 1.5.4-hotfix.2 • channel stable • https://github.com/flutter/flutter.git
Framework • revision 7a4c33425d (8 weeks ago) • 2019-04-29 11:05:24 -0700
Engine • revision 52c7a1e849
Tools • Dart 2.3.0 (build 2.3.0-dev.0.5 a1668566e5)