+Create an assortment with a certain name and pass some assortment_item Objects
+from newly created parts:
+
+ my $part1 = SL::Dev::Part::create_part( sellprice => '7.77')->save;
+ my $part2 = SL::Dev::Part::create_part( sellprice => '6.66')->save;
+ my $assortment_item_1 = SL::DB::AssortmentItem->new( parts_id => $part1->id, qty => 3, unit => $part1->unit, position => 1);
+ my $assortment_item_2 = SL::DB::AssortmentItem->new( parts_id => $part2->id, qty => 3, unit => $part2->unit, position => 2);
+ my $assortment_part = SL::Dev::Part::create_assortment( assnumber => 'Assortment 1',
+ description => 'assortment test',
+ sellprice => (3*$part1->sellprice + 3*$part2->sellprice),
+ lastcost => (3*$part1->lastcost + 3*$part2->lastcost),
+ assortment_items => [ $assortment_item_1, $assortment_item_2 ],
+ )->save;