add specs

app/models/ordergroup_invoice.rb

@@ -1,25 +1,10 @@
 class OrdergroupInvoice < ApplicationRecord
-  include InvoiceHelper
+  include InvoiceCommon
 
-  belongs_to :multi_group_order, optional: true
+  belongs_to :multi_group_order
 
-  # has_many :group_orders, through: :multi_group_order, dependent: :nullify
-
-  validates_presence_of :invoice_number
-  validates_uniqueness_of :invoice_number
-  validate :tax_number_set
   after_initialize :init, unless: :persisted?
 
-  # accepts_nested_attributes_for :group_orders, :multi_group_order
-
-
-  enum sequence_type: {
-    FRST: "Erst-Lastschrift",
-    RCUR: "Folge-Lastschrift",
-    OOFF: "Einmalige Lastschrift",
-    FNAL: "Letztmalige Lastschrift"
-  }
-
   def init
     self.invoice_date = Time.now unless invoice_date
     self.invoice_number = generate_invoice_number(self, 1) unless self.invoice_number
@@ -32,24 +17,8 @@ class OrdergroupInvoice < ApplicationRecord
     group_orders.first.ordergroup
   end
 
-  def tax_number_set
-    return if FoodsoftConfig[:contact][:tax_number].present?
-
-    errors.add(:cumulative_invoice, "Keine Steuernummer in FoodsoftConfig :contact gesetzt")
-  end
-
-  def mark_sepa_downloaded
-    self.sepa_downloaded = true
-    self.save
-  end
-
-  def unmark_sepa_downloaded
-    self.sepa_downloaded = false
-    self.save
-  end
-
-  def name
-    I18n.t('activerecord.attributes.ordergroup_invoice.name') + "_#{invoice_number}"
+  def send_invoice
+    NotifyOrdergroupInvoiceJob.perform_now(self)
   end
 
   def load_data_for_invoice