Show threshold in incident title for gitlab alerts

Rename `#email_subject` to `#full_title`

ee/app/mailers/ee/emails/projects.rb

@@ -26,7 +26,7 @@ module EE
           .present
         return unless @alert.valid?
 
-        subject_text = "Alert: #{@alert.email_subject}"
+        subject_text = "Alert: #{@alert.full_title}"
         mail(to: recipient(user_id, @project.group), subject: subject(subject_text))
       end
     end

ee/app/presenters/projects/prometheus/alert_presenter.rb

@@ -3,8 +3,8 @@
 module Projects
   module Prometheus
     class AlertPresenter < Gitlab::View::Presenter::Delegated
-      def email_subject
-        [environment_name, alert_title].compact.join(' ')
+      def full_title
+        [environment_name, alert_title].compact.join(': ')
       end
 
       def project_full_path

ee/app/services/incident_management/create_issue_service.rb

@@ -29,7 +29,7 @@ module IncidentManagement
     end
 
     def issue_title
-      alert.title
+      alert.full_title
     end
 
     def issue_description

ee/changelogs/unreleased/pl-full-title-incident-issues.yml

+---
+title: Show threshold in incident title for gitlab alerts
+merge_request: 14688
+author:
+type: changed

ee/spec/mailers/ee/emails/projects_spec.rb

@@ -46,7 +46,7 @@ describe EE::Emails::Projects do
       it_behaves_like 'a user cannot unsubscribe through footer link'
 
       it 'has expected subject' do
-        is_expected.to have_subject("#{project.name} | Alert: #{environment.name} #{title} for 5 minutes")
+        is_expected.to have_subject("#{project.name} | Alert: #{environment.name}: #{title} for 5 minutes")
       end
 
       it 'has expected content' do

ee/spec/presenters/projects/prometheus/alert_presenter_spec.rb

@@ -75,16 +75,16 @@ describe Projects::Prometheus::AlertPresenter do
       create(:alerting_alert, project: project, metric_id: metric_id)
     end
 
-    describe '#email_subject' do
+    describe '#full_title' do
       let(:query_title) do
         "#{gitlab_alert.title} #{gitlab_alert.computed_operator} #{gitlab_alert.threshold} for 5 minutes"
       end
 
       let(:expected_subject) do
-        "#{alert.environment.name} #{query_title}"
+        "#{alert.environment.name}: #{query_title}"
       end
 
-      subject { presenter.email_subject }
+      subject { presenter.full_title }
 
       it { is_expected.to eq(expected_subject) }
     end
@@ -114,11 +114,23 @@ describe Projects::Prometheus::AlertPresenter do
   end
 
   context 'without gitlab alert' do
-    describe '#email_subject' do
-      subject { presenter.email_subject }
+    describe '#full_title' do
+      subject { presenter.full_title }
 
+      context 'with title' do
+        let(:title) { 'some title' }
+
+        before do
+          expect(alert).to receive(:title).and_return(title)
+        end
+
+        it { is_expected.to eq(title) }
+      end
+
+      context 'without title' do
         it { is_expected.to eq('') }
       end
+    end
 
     describe '#metric_query' do
       subject { presenter.metric_query }

ee/spec/services/incident_management/create_issue_service_spec.rb

@@ -101,6 +101,30 @@ describe IncidentManagement::CreateIssueService do
       end
     end
 
+    context 'with gitlab alert' do
+      let(:gitlab_alert) { create(:prometheus_alert, project: project) }
+
+      before do
+        alert_payload['labels'] = {
+          'gitlab_alert_id' => gitlab_alert.prometheus_metric_id.to_s
+        }
+      end
+
+      it 'creates an issue' do
+        query_title = "#{gitlab_alert.title} #{gitlab_alert.computed_operator} #{gitlab_alert.threshold}"
+
+        expect(subject).to include(status: :success)
+
+        expect(issue.author).to eq(User.alert_bot)
+        expect(issue.title).to eq(alert_presenter.full_title)
+        expect(issue.title).to include(gitlab_alert.environment.name)
+        expect(issue.title).to include(query_title)
+        expect(issue.title).to include('for 5 minutes')
+        expect(issue.description).to include(alert_presenter.issue_summary_markdown)
+        expect(issue.description).not_to include(summary_separator)
+      end
+    end
+
     describe 'with invalid alert payload' do
       shared_examples 'invalid alert' do
         it 'does not create an issue' do