Create todos only for new mentions

1 files changed, 10 insertions, 1 deletions

diff --git a/spec/services/merge_requests/update_service_spec.rb b/spec/services/merge_requests/update_service_spec.rb
index ad3d767f193..f2ca1e6fcbd 100644
--- a/spec/services/merge_requests/update_service_spec.rb
+++ b/spec/services/merge_requests/update_service_spec.rb
@@ -12,6 +12,7 @@ describe MergeRequests::UpdateService, services: true do
 
   let(:merge_request) do
     create(:merge_request, :simple, title: 'Old title',
+                                    description: "FYI #{user2.to_reference}",
                                     assignee_id: user3.id,
                                     source_project: project)
   end
@@ -225,16 +226,24 @@ describe MergeRequests::UpdateService, services: true do
         it 'marks pending todos as done' do
           expect(pending_todo.reload).to be_done
         end
+
+        it 'does not create any new todos' do
+          expect(Todo.count).to eq(1)
+        end
       end
 
       context 'when the description change' do
         before do
-          update_merge_request({ description: 'Also please fix' })
+          update_merge_request({ description: "Also please fix #{user2.to_reference} #{user3.to_reference}" })
         end
 
         it 'marks pending todos as done' do
           expect(pending_todo.reload).to be_done
         end
+
+        it 'creates only 1 new todo' do
+          expect(Todo.count).to eq(2)
+        end
       end
 
       context 'when is reassigned' do