Add automatic generation of financial transactions and links

spec/factories/invoice.rb

@@ -0,0 +1,15 @@
+require 'factory_bot'
+
+FactoryBot.define do
+
+  factory :invoice do
+    supplier
+    number { rand(1..99999) }
+    amount { rand(0.1..26.0).round(2) }
+
+    after :create do |invoice|
+      invoice.supplier.reload
+    end
+  end
+
+end