Update spec style and add policy spec

spec/graphql/mutations/alert_management/update_alert_status_spec.rb

@@ -35,8 +35,8 @@ describe Mutations::AlertManagement::UpdateAlertStatus do
             allow(resolver).to receive(:resolve).and_return(alert)
           end
 
-          expect(alert).to receive(:save).and_return(false)
-          expect(alert).to receive(:errors).and_return(
+          allow(alert).to receive(:save).and_return(false)
+          allow(alert).to receive(:errors).and_return(
             double(full_messages: %w(foo bar))
           )
           expect(resolve).to eq(

spec/policies/alert_management/alert_policy_spec.rb

@@ -9,14 +9,15 @@ describe AlertManagement::AlertPolicy, :models do
   let(:policy) { described_class.new(user, alert) }
 
   describe 'rules' do
-    it { expect(policy).to be_disallowed :read_alert_management_alerts }
+    specify { expect(policy).to be_disallowed :read_alert_management_alerts }
 
     context 'when developer' do
       before do
         project.add_developer(user)
       end
 
-      it { expect(policy).to be_allowed :read_alert_management_alerts }
+      specify { expect(policy).to be_allowed :read_alert_management_alerts }
+      specify { expect(policy).to be_allowed :update_alert_management_alerts }
     end
   end
 end