scope<R> static method

Future<R> scope<R>(Future<R> body(MockShardObserver observer))

Installs a fresh MockShardObserver as the global observer for the duration of body, then restores whatever observer was previously set (including null) in a finally block.

Implementation

static Future<R> scope<R>(
  Future<R> Function(MockShardObserver observer) body,
) async {
  final previous = Shard.observer;
  final observer = MockShardObserver();
  Shard.observer = observer;
  try {
    return await body(observer);
  } finally {
    Shard.observer = previous;
  }
}