test: added new tests

test/integration/registrant_area/domain_update_confirms_test.rb

@@ -0,0 +1,18 @@
+require 'test_helper'
+
+class RegistrantAreaDomainUpdateConfirmsIntegrationTest < ApplicationIntegrationTest
+
+    setup do
+        @domain = domains(:shop)
+      end
+
+      def test_show_confirm_to_update_domain
+        @domain.update!(registrant_verification_asked_at: Time.zone.now,
+                        registrant_verification_token: 'test',
+                        statuses: [DomainStatus::PENDING_UPDATE])
+    
+        get registrant_domain_update_confirm_path(@domain, token: 'test', confirmed: true)
+        
+        assert @domain.registrant_update_confirmable?('test')
+      end
+end