A small package that will help you to access your assets/
folder during testing.
Code was originally copied from the original Github Issue.
Future<void> _pumpTag(final WidgetTester tester) async {
await tester.runAsync(() => DiskAssetBundle.loadGlob(['fonts/**.ttf'])); //relative to your /assets folder
return tester.pumpWidget(
YourWidgetUnderTest()
);
}