1 files changed, 88 insertions, 0 deletions
diff --git a/spec/services/system_notes/incidents_service_spec.rb b/spec/services/system_notes/incidents_service_spec.rb
new file mode 100644
index 00000000000..d1b831e9c4c
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+++ b/spec/services/system_notes/incidents_service_spec.rb
@@ -0,0 +1,88 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe SystemNotes::IncidentsService do
+  include Gitlab::Routing
+
+  let_it_be(:project) { create(:project) }
+  let_it_be(:user) { create(:user) }
+  let_it_be(:author) { create(:user) }
+  let_it_be(:incident) { create(:incident, project: project, author: user) }
+  let_it_be(:timeline_event) do
+    create(:incident_management_timeline_event, project: project, incident: incident, author: author)
+  end
+
+  describe '#add_timeline_event' do
+    subject { described_class.new(noteable: incident).add_timeline_event(timeline_event) }
+
+    it_behaves_like 'a system note' do
+      let(:noteable) { incident }
+      let(:action) { 'timeline_event' }
+    end
+
+    it 'posts the correct text to the system note' do
+      path = project_issues_incident_path(project, incident, anchor: "timeline_event_#{timeline_event.id}")
+      expect(subject.note).to match("added an [incident timeline event](#{path})")
+    end
+  end
+
+  describe '#edit_timeline_event' do
+    let(:was_changed) { :unknown }
+    let(:path) { project_issues_incident_path(project, incident, anchor: "timeline_event_#{timeline_event.id}") }
+
+    subject do
+      described_class.new(noteable: incident).edit_timeline_event(timeline_event, author, was_changed: was_changed)
+    end
+
+    it_behaves_like 'a system note' do
+      let(:noteable) { incident }
+      let(:action) { 'timeline_event' }
+    end
+
+    context "when only timeline event's occurred_at was changed" do
+      let(:was_changed) { :occurred_at }
+
+      it 'posts the correct text to the system note' do
+        expect(subject.note).to match("edited the event time/date on [incident timeline event](#{path})")
+      end
+    end
+
+    context "when only timeline event's note was changed" do
+      let(:was_changed) { :note }
+
+      it 'posts the correct text to the system note' do
+        expect(subject.note).to match("edited the text on [incident timeline event](#{path})")
+      end
+    end
+
+    context "when both timeline events occurred_at and note was changed" do
+      let(:was_changed) { :occurred_at_and_note }
+
+      it 'posts the correct text to the system note' do
+        expect(subject.note).to match("edited the event time/date and text on [incident timeline event](#{path})")
+      end
+    end
+
+    context "when was changed reason is unknown" do
+      let(:was_changed) { :unknown }
+
+      it 'posts the correct text to the system note' do
+        expect(subject.note).to match("edited [incident timeline event](#{path})")
+      end
+    end
+  end
+
+  describe '#delete_timeline_event' do
+    subject { described_class.new(noteable: incident).delete_timeline_event(author) }
+
+    it_behaves_like 'a system note' do
+      let(:noteable) { incident }
+      let(:action) { 'timeline_event' }
+    end
+
+    it 'posts the correct text to the system note' do
+      expect(subject.note).to match('deleted an incident timeline event')
+    end
+  end
+end