1 files changed, 19 insertions, 0 deletions
diff --git a/spec/models/project_spec.rb b/spec/models/project_spec.rb
index 49455303096..36ce3070a6e 100644
--- a/spec/models/project_spec.rb
+++ b/spec/models/project_spec.rb
@@ -1906,4 +1906,23 @@ describe Project, models: true do
       expect(project.pipeline_status).to be_loaded
     end
   end
+
+  describe '#append_or_update_attribute' do
+    let(:project) { create(:project) }
+
+    it 'shows full error updating an invalid MR' do
+      error_message = 'Failed to replace merge_requests because one or more of the new records could not be saved.'\
+                      ' Validate fork Source project is not a fork of the target project'
+
+      expect { project.append_or_update_attribute(:merge_requests, [create(:merge_request)]) }.
+        to raise_error(ActiveRecord::RecordNotSaved, error_message)
+    end
+
+    it 'updates the project succesfully' do
+      merge_request = create(:merge_request, target_project: project, source_project: project)
+
+      expect { project.append_or_update_attribute(:merge_requests, [merge_request]) }.
+        not_to raise_error
+    end
+  end
 end