+sub new_assembly {
+  my (%params) = @_;
+
+  my $assnumber       = delete $params{assnumber};
+  my $base_partnumber = delete $params{partnumber} || 'ap';
+
+  my $assembly_items = [];
+
+  if ( $params{assembly_items} ) {
+    $assembly_items = delete $params{assembly_items};
+  } else {
+    for my $i ( 1 .. delete $params{number_of_parts} || 3) {
+      my $part = new_part(partnumber  => "$base_partnumber $i",
+                          description => "Testpart $i",
+                         )->save;
+      push( @{$assembly_items}, SL::DB::Assembly->new(parts_id => $part->id,
+                                                      qty      => 1,
+                                                      position => $i,
+                                                     ));
+    }
+  }
+
+  my $assembly = SL::DB::Part->new_assembly(
+    partnumber         => $assnumber,
+    description        => 'Test Assembly',
+    sellprice          => '10',
+    lastcost           => '5',
+    assemblies         => $assembly_items,
+    buchungsgruppen_id => _default_buchungsgruppe()->id,
+    unit               => _default_unit()->name
+  );
+  $assembly->assign_attributes( %params );
+  return $assembly;
+}
+
+sub new_assortment {
+  my (%params) = @_;
+
+  my $assnumber       = delete $params{assnumber};
+  my $base_partnumber = delete $params{partnumber} || 'ap';
+
+  my $assortment_items = [];
+
+  if ( $params{assortment_items} ) {
+    $assortment_items = delete $params{assortment_items};
+  } else {
+    for my $i ( 1 .. delete $params{number_of_parts} || 3) {
+      my $part = new_part(partnumber  => "$base_partnumber $i",
+                          description => "Testpart $i",
+                         )->save;
+      push( @{$assortment_items}, SL::DB::AssortmentItem->new(parts_id => $part->id,
+                                                              qty      => 1,
+                                                              position => $i,
+                                                              unit     => $part->unit,
+                                                             ));
+    }
+  }
+
+  my $assortment = SL::DB::Part->new_assortment(
+    partnumber         => $assnumber,
+    description        => 'Test Assortment',
+    sellprice          => '10',
+    lastcost           => '5',
+    assortment_items   => $assortment_items,
+    buchungsgruppen_id => _default_buchungsgruppe()->id,
+    unit               => _default_unit()->name
+  );
+
+  $assortment->assign_attributes( %params );
+  return $assortment;
+}
+
+
+sub _default_buchungsgruppe {
+  return SL::DB::Manager::Buchungsgruppe->find_by(description => 'Standard 19%') || die "No accounting group";
+}
+
+sub _default_unit {
+  return SL::DB::Manager::Unit->find_by(name => 'Stck') || die "No unit";
+}
+
+