1 files changed, 60 insertions, 0 deletions
diff --git a/spec/workers/incident_management/add_severity_system_note_worker_spec.rb b/spec/workers/incident_management/add_severity_system_note_worker_spec.rb
new file mode 100644
index 00000000000..203c62ffe6f
--- /dev/null
+++ b/spec/workers/incident_management/add_severity_system_note_worker_spec.rb
@@ -0,0 +1,60 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe IncidentManagement::AddSeveritySystemNoteWorker do
+  let_it_be(:project) { create(:project) }
+  let_it_be(:user) { create(:user) }
+  let_it_be(:incident) { create(:incident, project: project) }
+  let_it_be(:issuable_severity) { create(:issuable_severity, issue: incident, severity: :medium) }
+
+  describe '#perform' do
+    let(:incident_id) { incident.id }
+    let(:user_id) { user.id }
+
+    subject(:perform) { described_class.new.perform(incident_id, user_id) }
+
+    shared_examples 'does not add a system note' do
+      it 'does not change incident notes count' do
+        expect { perform }.not_to change { incident.notes.count }
+      end
+    end
+
+    context 'when incident and user exist' do
+      it 'creates a system note' do
+        expect { perform }.to change { incident.notes.where(author: user).count }.by(1)
+      end
+    end
+
+    context 'when incident does not exist' do
+      let(:incident_id) { -1 }
+
+      it_behaves_like 'does not add a system note'
+    end
+
+    context 'when incident_id is nil' do
+      let(:incident_id) { nil }
+
+      it_behaves_like 'does not add a system note'
+    end
+
+    context 'when issue is not an incident' do
+      let_it_be(:issue) { create(:issue, project: project) }
+      let(:incident_id) { issue.id }
+
+      it_behaves_like 'does not add a system note'
+    end
+
+    context 'when user does not exist' do
+      let(:user_id) { -1 }
+
+      it_behaves_like 'does not add a system note'
+    end
+
+    context 'when user_id is nil' do
+      let(:user_id) { nil }
+
+      it_behaves_like 'does not add a system note'
+    end
+  end
+end