added more specs

spec/lib/gitlab/import_export/project_tree_saver_spec.rb

@@ -112,7 +112,7 @@ describe Gitlab::ImportExport::ProjectTreeSaver, services: true do
       end
 
       it 'saves the correct service type' do
-        expect(saved_project_json['services'].first['type']).not_to be_nil
+        expect(saved_project_json['services'].first['type']).to eq('CustomIssueTrackerService')
       end
 
       it 'has project feature' do

spec/models/project_services/custom_issue_tracker_service_spec.rb

@@ -25,5 +25,21 @@ describe CustomIssueTrackerService, models: true do
       it { is_expected.not_to validate_presence_of(:issues_url) }
       it { is_expected.not_to validate_presence_of(:new_issue_url) }
     end
+
+    context 'title' do
+      let(:issue_tracker) { described_class.new(properties: {}) }
+
+      it 'sets a default title' do
+        issue_tracker.title = nil
+
+        expect(issue_tracker.title).to eq('Custom Issue Tracker')
+      end
+
+      it 'sets the custom title' do
+        issue_tracker.title = 'test title'
+
+        expect(issue_tracker.title).to eq('test title')
+      end
+    end
   end
 end