Storybook Riverpod Knob

stories.dart

extension on Iterable<(String, Override)> {
  List<Option> toKnobOptions() => List<Option>.from(map((e) => Option(label: e.$1, value: e)));
}

final knobOverride = Story(
  name: "Knob/Override",
  builder: (context) {
    final options = [
      (
        "Loading",
        getLocalPathFromStorageFile.overrideWith((_, __) async {
            await Future.delayed(const Duration(days: 365));
            throw UnimplementedError();
        }),
      ),
      (
        "Error",
        getLocalPathFromStorageFile.overrideWith((_, __) async => throw Exception("Something failed")),
      )
    ];
    final overrides = context.knobs.options(
        label: "State",
        initial: options[0],
        options: options.toKnobOptions(),
    return ProviderScope(
        key: Key(overrides.$1),
        overrides: [overrides.$2],
        child: const Placeholder());
  },
);