fix deposit is net value

spec/models/article_spec.rb

@@ -64,7 +64,10 @@ describe Article do
     article.tax = 12
     expect(article.gross_price).to eq((article.price * 1.12).round(2))
     article.deposit = 1.20
-    expect(article.gross_price).to eq(((article.price + 1.20) * 1.12).round(2))
+    if FoodsoftConfig[:group_order_invoices]&.[](:separate_deposits)
+      expect(article.gross_price_without_deposit).to eq((article.price * 1.12 + 1.20).round(2))
+      expect(article.gross_price).to eq(((article.price + 1.20) * 1.12).round(2))
+    end
   end
 
   it 'gross price >= net price' do