public void PartitionBy_WithEmptyEnumerableAndEmptyCount_Throws() => Throws <ArgumentOutOfRangeException>( () => ENMRBL_EMPTY.PartitionBy(0).ToList());
public void PartitionBy_WithEmptyEnumerableAndNegativeCount_Throws() => Throws <ArgumentOutOfRangeException>( () => ENMRBL_EMPTY.PartitionBy(-COUNT_ANY).ToList());