Add rake task to set the status of expired registration exemptions

app/models/waste_exemptions_engine/registration_exemption.rb

@@ -4,6 +4,8 @@
 
 module WasteExemptionsEngine
   class RegistrationExemption < ActiveRecord::Base
+    self.table_name = "registration_exemptions"
+
     include CanDeactivateExemption
     include CanBeOrderedByStateAndExemptionId
 
@@ -16,7 +18,8 @@ class RegistrationExemption < ActiveRecord::Base
         .order(:registered_on, :registration_id)
     }
 
-    scope :not_expired, -> { where("expires_on > CURRENT_DATE") }
+    scope :not_expired, -> { where("expires_on >= CURRENT_DATE") }
+    scope :expired, -> { where("expires_on < CURRENT_DATE") }
 
     scope :all_active_exemptions, lambda {
       active

app/services/expired_registrations_service.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+class ExpiredRegistrationsService < ::WasteExemptionsEngine::BaseService
+  def run
+    all_expired_registration_exemptions.update_all(state: :expired)
+  end
+
+  private
+
+  def all_expired_registration_exemptions
+    WasteExemptionsEngine::RegistrationExemption.active.expired
+  end
+end

lib/tasks/expire_registration.rake

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+namespace :expire_registration do
+  desc "Set the status of expired registations to expired"
+  task run: :environment do
+    ExpiredRegistrationsService.run
+  end
+end

spec/services/expired_registrations_service_spec.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+RSpec.describe ExpiredRegistrationsService do
+  describe ".run" do
+    it "sets the status of active registration exemptions that have an expiry date in the past to expired" do
+      expired_registration_exemption = create(:registration_exemption, expires_on: 1.day.ago)
+
+      expect { described_class.run }
+        .to change { expired_registration_exemption.reload.state }
+        .from("active")
+        .to("expired")
+    end
+
+    it "does not change the state of expired registration that are not in an active status" do
+      expired_registration_exemption = create(:registration_exemption, :ceased, expires_on: 1.day.ago)
+
+      expect { described_class.run }
+        .not_to change { expired_registration_exemption.reload.state }
+    end
+  end
+end