Merge branch 'sh-fix-flaky-interpret-service-spec' into 'master'

Fix flaky spec in QuickActions::InterpretService#execute

See merge request gitlab-org/gitlab!50605

spec/services/quick_actions/interpret_service_spec.rb

@@ -789,12 +789,32 @@ RSpec.describe QuickActions::InterpretService do
         project.add_developer(developer2)
       end
 
-      it_behaves_like 'assign command' do
+      # There's no guarantee that the reference extractor will preserve
+      # the order of the mentioned users since this is dependent on the
+      # order in which rows are returned. We just ensure that at least
+      # one of the mentioned users is assigned.
+      shared_examples 'assigns to one of the two users' do
+        let(:content) { "/assign @#{developer.username} @#{developer2.username}" }
+
+        it 'assigns to a single user' do
+          _, updates, message = service.execute(content, issuable)
+
+          expect(updates[:assignee_ids].count).to eq(1)
+          assignee = updates[:assignee_ids].first
+          expect([developer.id, developer2.id]).to include(assignee)
+
+          user = assignee == developer.id ? developer : developer2
+
+          expect(message).to match("Assigned #{user.to_reference}.")
+        end
+      end
+
+      it_behaves_like 'assigns to one of the two users' do
         let(:content) { "/assign @#{developer.username} @#{developer2.username}" }
         let(:issuable) { issue }
       end
 
-      it_behaves_like 'assign command', quarantine: 'https://gitlab.com/gitlab-org/gitlab/-/issues/27989' do
+      it_behaves_like 'assigns to one of the two users' do
         let(:content) { "/assign @#{developer.username} @#{developer2.username}" }
         let(:issuable) { merge_request }
       end