anchor.diff:  	SubscriberID = list_to_binary(ocs:generate_identity()),
   	Password = ocs:generate_password(),
   	Chars = [{validity, erlang:system_time(?MILLISECOND) + 2592000000}],
  -	RemAmount = 10,
  +	RemAmount = 0,
   	Buckets = [#bucket{units = cents, remain_amount = RemAmount,
   		start_date = erlang:system_time(?MILLISECOND),
   		termination_date = erlang:system_time(?MILLISECOND) + 2592000000}],
  
positive.code: 	SessionId = [{'Session-Id', list_to_binary(ocs:generate_password())}],
  	{ok, _} = ocs:add_subscriber(SubscriberID, Password, ProdID, Chars, Buckets),
  	{out_of_credit, _} = ocs_rating:rate(radius, SubscriberID, Destination, initial, [], [{octets, PackageSize}], SessionId),
  	{ok, #subscriber{buckets = RatedBuckets}} = ocs:find_subscriber(SubscriberID),
  	#bucket{remain_amount = 0} = lists:keyfind(cents, #bucket.units, RatedBuckets).
  
  
negative.code: %%
  all() -> 
  	[initial_reservation_available_remain_amount, initial_reservation_out_of_credit,
  	initial_reservation_multiple_sesion_with_out_of_credit,
  	initial_reservation_overhead, initial_reservation_multiple_buckets,
  	initial_reservation_expiry_buckets, initial_reservation_ignore_expired_buckets,
  	initial_reservation_add_session_attributes, interim_reservation_avaialbe_remain_amount,
  