Test returning unprocessable entity when match_score update fails

spec/controllers/match_scores_controller_spec.rb

@@ -34,7 +34,7 @@ RSpec.describe MatchScoresController, type: :controller do
         before(:each) do
           apply_authentication_headers_for @owner
         end
-
+        context 'when match_score update succeeds' do
           it 'updates the requested score' do
             put :update, params: { id: @match_score.to_param }.merge(valid_update)
             @match_score.reload
@@ -49,6 +49,20 @@ RSpec.describe MatchScoresController, type: :controller do
           end
         end
 
+        context 'when match_score update fails' do
+          before do
+            allow_any_instance_of(MatchScore)
+              .to receive(:update)
+              .and_return(false)
+          end
+
+          it 'returns unprocessable entity' do
+            put :update, params: { id: @match_score.to_param }.merge(valid_update)
+            expect(response).to have_http_status(:unprocessable_entity)
+          end
+        end
+      end
+
       context 'as another user' do
         before(:each) do
           apply_authentication_headers_for create(:user)