Do not show 'automatically removed' for manually removed labels

'Automatically removed' suffix was being added to system notes even
if the label was manually removed.

ee/app/models/ee/label_note.rb

@@ -9,7 +9,11 @@ module EE
 
     override :removed_prefix
     def removed_prefix
-      scoped_labels_event? ?  'automatically removed' : super
+      if any_label_manually_removed?
+        super
+      else
+        'automatically removed'
+      end
     end
 
     override :added_suffix
@@ -20,5 +24,19 @@ module EE
     def scoped_labels_event?
       events.first.label&.scoped_label?
     end
+
+    # Returns true if a scoped label "remove" event doesn't have a matching "add" event.
+    def any_label_manually_removed?
+      return true unless scoped_labels_event?
+
+      remove_events = events.select(&:remove?)
+      add_events = events.select(&:add?)
+
+      remove_events.any? do |remove_event|
+        add_events.none? do |add_event|
+          add_event.label.scoped_label_key == remove_event.label.scoped_label_key
+        end
+      end
+    end
   end
 end

ee/changelogs/unreleased/issue_12952.yml

+---
+title: Do not show 'automatically removed' suffix for manually removed labels
+merge_request: 16079
+author:
+type: fixed

ee/spec/services/ee/resource_events/merge_into_notes_service_spec.rb

@@ -10,12 +10,6 @@ describe ResourceEvents::MergeIntoNotesService do
     create(:resource_label_event, event_params.merge(params))
   end
 
-  def create_note(params)
-    opts = { noteable: resource, project: project }
-
-    create(:note_on_issue, opts.merge(params))
-  end
-
   set(:project) { create(:project) }
   set(:user) { create(:user) }
   set(:resource) { create(:issue, project: project) }
@@ -58,5 +52,38 @@ describe ResourceEvents::MergeIntoNotesService do
       expect(notes.count).to eq(4)
       expect(notes.map(&:note)).to match_array(expected)
     end
+
+    context 'scoped labels' do
+      context 'when all labels are automatically removed' do
+        it 'adds "automatically removed" message' do
+          create_event(created_at: time, label: scoped_label_group1_1, action: :add)
+          create_event(created_at: time, label: scoped_label_group1_2, action: :remove)
+          create_event(created_at: time, label: scoped_label_group2_1, action: :add)
+          create_event(created_at: time, label: scoped_label_group2_2, action: :remove)
+
+          note = described_class.new(resource, user).execute.first.note
+
+          added_scoped_labels_refs = [scoped_label_group1_1, scoped_label_group2_1].map(&:to_reference).sort.join(' ')
+          removed_scoped_labels_refs = [scoped_label_group1_2, scoped_label_group2_2].map(&:to_reference).sort.join(' ')
+
+          expect(note).to eq("added #{added_scoped_labels_refs} scoped labels and automatically removed #{removed_scoped_labels_refs} labels")
+        end
+      end
+
+      context 'when any of the labels is manually removed' do
+        it 'adds "removed" message' do
+          create_event(created_at: time, label: scoped_label_group1_1, action: :add)
+          create_event(created_at: time, label: scoped_label_group1_2, action: :remove)
+          create_event(created_at: time, label: scoped_label_group2_1, action: :remove)
+
+          note = described_class.new(resource, user).execute.first.note
+
+          added_scoped_labels_refs = scoped_label_group1_1.to_reference
+          removed_scoped_labels_refs = [scoped_label_group1_2, scoped_label_group2_1].map(&:to_reference).sort.join(' ')
+
+          expect(note).to eq("added #{added_scoped_labels_refs} scoped label and removed #{removed_scoped_labels_refs} labels")
+        end
+      end
+    end
   end
 end