Create todos only for new mentions

1 files changed, 10 insertions, 1 deletions

diff --git a/spec/services/issues/update_service_spec.rb b/spec/services/issues/update_service_spec.rb
index fa472f3e2c3..5b324f3c706 100644
--- a/spec/services/issues/update_service_spec.rb
+++ b/spec/services/issues/update_service_spec.rb
@@ -13,6 +13,7 @@ describe Issues::UpdateService, services: true do
 
   let(:issue) do
     create(:issue, title: 'Old title',
+                   description: "for #{user2.to_reference}",
                    assignee_id: user3.id,
                    project: project)
   end
@@ -182,16 +183,24 @@ describe Issues::UpdateService, services: true do
         it 'marks pending todos as done' do
           expect(todo.reload.done?).to eq true
         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_issue(description: 'Also please fix')
+          update_issue(description: "Also please fix #{user2.to_reference} #{user3.to_reference}")
         end
 
         it 'marks todos as done' do
           expect(todo.reload.done?).to eq true
         end
+
+        it 'creates only 1 new todo' do
+          expect(Todo.count).to eq(2)
+        end
       end
 
       context 'when is reassigned' do