Add notifications for new user mentions in merge requests

1 files changed, 33 insertions, 0 deletions

diff --git a/spec/services/merge_requests/update_service_spec.rb b/spec/services/merge_requests/update_service_spec.rb
index 283a336afd9..e26e925cd81 100644
--- a/spec/services/merge_requests/update_service_spec.rb
+++ b/spec/services/merge_requests/update_service_spec.rb
@@ -226,6 +226,39 @@ describe MergeRequests::UpdateService, services: true do
       end
     end
 
+    context 'updated user mentions' do
+      let(:user4) { create(:user) }
+      before do
+        project.team << [user4, :developer]
+      end
+
+      context "in title" do
+        before do
+          perform_enqueued_jobs { update_merge_request(title: user4.to_reference) }
+        end
+
+        it "should email only the newly-mentioned user" do
+          should_not_email(user)
+          should_not_email(user2)
+          should_not_email(user3)
+          should_email(user4)
+        end
+      end
+
+      context "in description" do
+        before do
+          perform_enqueued_jobs { update_merge_request(description: user4.to_reference) }
+        end
+
+        it "should email only the newly-mentioned user" do
+          should_not_email(user)
+          should_not_email(user2)
+          should_not_email(user3)
+          should_email(user4)
+        end
+      end
+    end
+
     context 'when MergeRequest has tasks' do
       before { update_merge_request({ description: "- [ ] Task 1\n- [ ] Task 2" }) }