public async Task when_they_do_not_exist_throws()
        {
            var streamName = GetStreamName();
            var connection = _fixture.Connection;

            await Assert.ThrowsAsync <InvalidOperationException>(() => connection.UpdatePersistentSubscriptionAsync(
                                                                     streamName, Group, PersistentSubscriptionSettings.Create(), DefaultUserCredentials.Admin))
            .WithTimeout();
        }
 public Task CreatePersistentSubscriptionAsync(string stream, string groupName, PersistentSubscriptionSettings settings,
     UserCredentials credentials)
 {
     throw new NotImplementedException();
 }