[Flutter] Flutter - Load assets for tests

Not sure if it's a limitation or something, but below code does not load anything. I have some data driven behaviour that I'd like to test isolated.

class Loader

import 'dart:async';
import 'package:flutter/services.dart' show rootBundle;

class Loader {
Future<String> load() async{
return await rootBundle.loadString('assets/json/sketch.json');
}
}


The test

testWidgets('Should parse load sketch.json', (WidgetTester tester) async {
var loaderFuture = new Loader();

Future<String> resultFuture = loaderFuture.load();

resultFuture.then((value) => print(value))
.catchError((error) => print(error));

while(true){};
});


Future does not return neither success nor error and hangs forever. I know the while(true) locking up the test, but for now I just wanted to see sketch.json printed

Asset location



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