Create system notes for epic close and reopen

app/services/system_note_service.rb

@@ -212,7 +212,7 @@ module SystemNoteService
   #   "closed via bc17db76"
   #
   # Returns the created Note object
-  def change_status(noteable, project, author, status, source)
+  def change_status(noteable, project, author, status, source = nil)
     body = status.dup
     body << " via #{source.gfm_reference(project)}" if source
 

ee/app/services/epics/close_service.rb

@@ -13,6 +13,7 @@ module Epics
     def close_epic(epic)
       if epic.close
         epic.update(closed_by: current_user)
+        SystemNoteService.change_status(epic, nil, current_user, epic.state)
       end
     end
   end

ee/app/services/epics/reopen_service.rb

@@ -5,8 +5,15 @@ module Epics
     def execute(epic)
       return epic unless can?(current_user, :update_epic, epic)
 
-      epic.reopen
-      epic
+      reopen_epic(epic)
+    end
+
+    private
+
+    def reopen_epic(epic)
+      if epic.reopen
+        SystemNoteService.change_status(epic, nil, current_user, epic.state)
+      end
     end
   end
 end

ee/changelogs/unreleased/7015-epic-states-notes.yml

+---
+title: Create system notes for epic close and reopen
+merge_request: 7850
+author:
+type: added

ee/spec/services/epics/close_service_spec.rb

@@ -41,6 +41,15 @@ describe Epics::CloseService do
           it 'changes closed_at' do
             expect { subject.execute(epic) }.to change { epic.closed_at }
           end
+
+          it 'creates a system note about epic close' do
+            expect { subject.execute(epic) }.to change { epic.notes.count }.by(1)
+
+            note = epic.notes.last
+
+            expect(note.note).to eq('closed')
+            expect(note.system_note_metadata.action).to eq('closed')
+          end
         end
 
         context 'when trying to close a closed epic' do
@@ -59,6 +68,10 @@ describe Epics::CloseService do
           it 'does not change closed_by' do
             expect { subject.execute(epic) }.not_to change { epic.closed_by }
           end
+
+          it 'does not create a system note' do
+            expect { subject.execute(epic) }.not_to change { epic.notes.count }
+          end
         end
       end
 

ee/spec/services/epics/reopen_service_spec.rb

@@ -41,6 +41,15 @@ describe Epics::ReopenService do
           it 'removes closed_at' do
             expect { subject.execute(epic) }.to change { epic.closed_at }.to(nil)
           end
+
+          it 'creates a system note about epic reopen' do
+            expect { subject.execute(epic) }.to change { epic.notes.count }.by(1)
+
+            note = epic.notes.last
+
+            expect(note.note).to eq('opened')
+            expect(note.system_note_metadata.action).to eq('opened')
+          end
         end
 
         context 'when trying to reopen an opened epic' do
@@ -59,6 +68,10 @@ describe Epics::ReopenService do
           it 'does not change closed_by' do
             expect { subject.execute(epic) }.not_to change { epic.closed_by }
           end
+
+          it 'does not create a system note' do
+            expect { subject.execute(epic) }.not_to change { epic.notes.count }
+          end
         end
       end