Added spec to check for disabled services

spec/models/project_spec.rb

@@ -4353,18 +4353,39 @@ describe Project do
       end
     end
 
-    describe "#find_or_initialize_service" do
-      subject { build(:project) }
+  end
 
-      it 'avoids N+1 database queries' do
-        allow(Service).to receive(:available_services_names).and_return(%w(prometheus pushover))
+  describe "#find_or_initialize_services" do
+    subject { build(:project) }
 
-        control_count = ActiveRecord::QueryRecorder.new { project.find_or_initialize_service('prometheus') }.count
+    it 'returns only enabled services' do
+      allow(Service).to receive(:available_services_names).and_return(%w(prometheus pushover))
+      allow(subject).to receive(:disabled_services).and_return(%w(prometheus))
 
-        allow(Service).to receive(:available_services_names).and_call_original
+      services = subject.find_or_initialize_services
 
-        expect { project.find_or_initialize_service('prometheus') }.not_to exceed_query_limit(control_count)
-      end
+      expect(services.count).to eq 1
+      expect(services).to include(PushoverService)
+    end
+  end
+
+  describe "#find_or_initialize_service" do
+    subject { build(:project) }
+
+    it 'avoids N+1 database queries' do
+      allow(Service).to receive(:available_services_names).and_return(%w(prometheus pushover))
+
+      control_count = ActiveRecord::QueryRecorder.new { subject.find_or_initialize_service('prometheus') }.count
+
+      allow(Service).to receive(:available_services_names).and_call_original
+
+      expect { subject.find_or_initialize_service('prometheus') }.not_to exceed_query_limit(control_count)
+    end
+
+    it 'returns nil if service is disabled' do
+      allow(subject).to receive(:disabled_services).and_return(%w(prometheus))
+
+      expect(subject.find_or_initialize_service('prometheus')).to be_nil
     end
   end