Add mutation spec and re-word policy spec

spec/graphql/mutations/alert_management/update_alert_status_spec.rb

@@ -9,6 +9,8 @@ describe Mutations::AlertManagement::UpdateAlertStatus do
   let(:new_status) { 'acknowledged' }
   let(:args) { { status: new_status, project_path: project.full_path, iid: alert.iid } }
 
+  specify { expect(described_class).to require_graphql_authorizations(:update_alert_management_alerts) }
+
   describe '#resolve' do
     subject(:resolve) { mutation_for(project, current_user).resolve(args) }
 

spec/policies/alert_management/alert_policy_spec.rb

@@ -6,18 +6,20 @@ describe AlertManagement::AlertPolicy, :models do
   let(:alert) { create(:alert_management_alert) }
   let(:project) { alert.project }
   let(:user) { create(:user) }
-  let(:policy) { described_class.new(user, alert) }
+
+  subject(:policy) { described_class.new(user, alert) }
 
   describe 'rules' do
-    specify { expect(policy).to be_disallowed :read_alert_management_alerts }
+    it { is_expected.to be_disallowed :read_alert_management_alerts }
+    it { is_expected.to be_disallowed :update_alert_management_alerts }
 
     context 'when developer' do
       before do
         project.add_developer(user)
       end
 
-      specify { expect(policy).to be_allowed :read_alert_management_alerts }
-      specify { expect(policy).to be_allowed :update_alert_management_alerts }
+      it { is_expected.to be_allowed :read_alert_management_alerts }
+      it { is_expected.to be_allowed :update_alert_management_alerts }
     end
   end
 end