public void PartitionBy_WithEmptyListAndEmptyCount_Throws() => Throws <ArgumentOutOfRangeException>( () => LIST_EMPTY.PartitionBy(0).ToList());
public void PartitionBy_WithEmptyListAndNegativeCount_Throws() => Throws <ArgumentOutOfRangeException>( () => LIST_EMPTY.PartitionBy(-COUNT_ANY).ToList());