Add `urgent` scope to `SoftwareUpdate` model

app/mailers/admin_mailer.rb

@@ -56,7 +56,7 @@ class AdminMailer < ApplicationMailer
   end
 
   def new_critical_software_updates
-    @software_updates = SoftwareUpdate.where(urgent: true).to_a.sort_by(&:gem_version)
+    @software_updates = SoftwareUpdate.urgent.to_a.sort_by(&:gem_version)
 
     locale_for_account(@me) do
       mail subject: default_i18n_subject(instance: @instance)

app/models/software_update.rb

@@ -18,6 +18,8 @@ class SoftwareUpdate < ApplicationRecord
 
   enum :type, { patch: 0, minor: 1, major: 2 }, suffix: :type
 
+  scope :urgent, -> { where(urgent: true) }
+
   def gem_version
     Gem::Version.new(version)
   end

spec/models/software_update_spec.rb

@@ -3,6 +3,19 @@
 require 'rails_helper'
 
 RSpec.describe SoftwareUpdate do
+  describe 'Scopes' do
+    describe '.urgent' do
+      let!(:urgent_update) { Fabricate :software_update, urgent: true }
+      let!(:non_urgent_update) { Fabricate :software_update, urgent: false }
+
+      it 'returns records that are urgent' do
+        expect(described_class.urgent)
+          .to include(urgent_update)
+          .and not_include(non_urgent_update)
+      end
+    end
+  end
+
   describe '#pending?' do
     subject { described_class.new(version: update_version) }