Refactor domain transfer

#694

test/models/domain_transfer_test.rb

@@ -0,0 +1,30 @@
+require 'test_helper'
+
+class DomainTransferTest < ActiveSupport::TestCase
+  def setup
+    @domain_transfer = domain_transfers(:shop)
+  end
+
+  def test_approval
+    @domain_transfer.approve
+    @domain_transfer.reload
+    assert @domain_transfer.approved?
+  end
+
+  def test_notifies_old_registrar_on_approval
+    old_registrar = @domain_transfer.old_registrar
+
+    assert_difference -> { old_registrar.messages.count } do
+      @domain_transfer.approve
+    end
+
+    body = 'Domain transfer was approved, associated contacts were: ["jane-001", "william-001"] and registrant was john-001'
+    id = @domain_transfer.id
+    class_name = @domain_transfer.class.name
+
+    message = old_registrar.messages.last
+    assert_equal body, message.body
+    assert_equal id, message.attached_obj_id
+    assert_equal class_name, message.attached_obj_type
+  end
+end