Fetch available issue types in Jira integration for vulnerabilities

This change adds fetching availalbe issue types for Jira integration for
vulnerabilities when the integration is being tested.

app/controllers/projects/services_controller.rb

@@ -70,7 +70,7 @@ class Projects::ServicesController < Projects::ApplicationController
       return { error: true, message: s_('Integrations|Connection failed. Please check your settings.'), service_response: result[:message].to_s, test_failed: true }
     end
 
-    {}
+    result[:data].presence || {}
   rescue Gitlab::HTTP::BlockedUrlError => e
     { error: true, message: s_('Integrations|Connection failed. Please check your settings.'), service_response: e.message, test_failed: true }
   end

ee/app/models/project_services/ee/jira_service.rb

@@ -7,5 +7,22 @@ module EE
     prepended do
       validates :project_key, presence: true, if: :issues_enabled
     end
+
+    def issue_types
+      client
+        .Issuetype
+        .all
+        .reject { |issue_type| issue_type.subtask }
+        .map { |issue_type| { id: issue_type.id, name: issue_type.name, description: issue_type.description } }
+    end
+
+    def test(_)
+      super.then do |result|
+        next result unless result[:success]
+        next result unless project.try(:jira_vulnerabilities_integration_enabled?)
+
+        result.merge(data: { issuetypes: issue_types })
+      end
+    end
   end
 end

ee/changelogs/unreleased/276893-add-fetching-available-issue-types-to-test.yml

+---
+title: Fetch available issue types in Jira integration for vulnerabilities
+merge_request: 47046
+author:
+type: added

ee/spec/models/project_services/jira_service_spec.rb

@@ -13,4 +13,56 @@ RSpec.describe JiraService do
       expect(jira_service).to be_invalid
     end
   end
+
+  describe '#issue_types' do
+    subject(:issue_types) { jira_service.issue_types }
+
+    let(:client) { double(Issuetype: issue_type_jira_resource) }
+    let(:issue_type_jira_resource) { double(all: jira_issue_types) }
+    let(:jira_issue_types) { [double(subtask: true), double(subtask: false, id: '10001', name: 'Bug', description: 'Jira Bug')] }
+
+    before do
+      allow(jira_service.project).to receive(:jira_vulnerabilities_integration_enabled?).and_return(true)
+      allow(jira_service).to receive(:client).and_return(client)
+    end
+
+    it 'loads all issue types without subtask issue types' do
+      expect(issue_types).to eq([{ id: '10001', name: 'Bug', description: 'Jira Bug' }])
+    end
+  end
+
+  describe '#test' do
+    subject(:jira_test) { jira_service.test(nil) }
+
+    context 'when server is not responding' do
+      before do
+        allow(jira_service).to receive(:server_info).and_return(nil)
+      end
+
+      it { is_expected.to eq(success: false, result: nil) }
+    end
+
+    context 'when server is responding' do
+      before do
+        allow(jira_service).to receive(:server_info).and_return({ jira: true })
+      end
+
+      context 'when vulnerabilities integration is not enabled' do
+        before do
+          allow(jira_service.project).to receive(:jira_vulnerabilities_integration_enabled?).and_return(false)
+        end
+
+        it { is_expected.to eq(success: true, result: { jira: true }) }
+      end
+
+      context 'when vulnerabilities integration is enabled' do
+        before do
+          allow(jira_service.project).to receive(:jira_vulnerabilities_integration_enabled?).and_return(true)
+          allow(jira_service).to receive(:issue_types).and_return([{ id: '10001', name: 'Bug', description: 'Jira Bug' }])
+        end
+
+        it { is_expected.to eq(success: true, result: { jira: true }, data: { issuetypes: [{ id: '10001', name: 'Bug', description: 'Jira Bug' }] }) }
+      end
+    end
+  end
 end