Merge branch 'pl-fix-alert-serialization' into 'master'

Fix alert serialization when opening incidents

See merge request gitlab-org/gitlab-ee!10254

ee/app/services/projects/prometheus/alerts/notify_service.rb

@@ -133,7 +133,7 @@ module Projects
         def process_incident_issues
           firings.each do |alert|
             IncidentManagement::ProcessAlertWorker
-              .perform_async(project.id, alert)
+              .perform_async(project.id, alert.to_h)
           end
         end
 

ee/spec/services/projects/prometheus/alerts/notify_service_spec.rb

@@ -29,18 +29,20 @@ describe Projects::Prometheus::Alerts::NotifyService do
     end
   end
 
-  shared_examples 'processes incident issues' do |amount|
+  shared_examples 'processes incident issues', :sidekiq do |amount|
     let(:create_incident_service) { spy }
 
     it 'processes issues' do
       expect(IncidentManagement::ProcessAlertWorker)
         .to receive(:perform_async)
-        .with(project.id, anything)
+        .with(project.id, kind_of(Hash))
         .exactly(amount).times
 
+      Sidekiq::Testing.inline! do
         expect(subject).to eq(true)
       end
     end
+  end
 
   shared_examples 'does not process incident issues' do
     it 'does not process issues' do