1 files changed, 25 insertions, 0 deletions
diff --git a/spec/services/merge_requests/merge_when_pipeline_succeeds_service_spec.rb b/spec/services/merge_requests/merge_when_pipeline_succeeds_service_spec.rb
index f92978a33a3..0ff6e8fda16 100644
--- a/spec/services/merge_requests/merge_when_pipeline_succeeds_service_spec.rb
+++ b/spec/services/merge_requests/merge_when_pipeline_succeeds_service_spec.rb
@@ -111,6 +111,31 @@ describe MergeRequests::MergeWhenPipelineSucceedsService do
         service.trigger(unrelated_pipeline)
       end
     end
+
+    context 'when the merge request is not mergeable' do
+      let(:mr_conflict) do
+        create(:merge_request, merge_when_build_succeeds: true, merge_user: user,
+                               source_branch: 'master', target_branch: 'feature-conflict',
+                               source_project: project, target_project: project)
+      end
+
+      let(:conflict_pipeline) do
+        create(:ci_pipeline, project: project, ref: mr_conflict.source_branch,
+                             sha: mr_conflict.diff_head_sha, status: 'success')
+      end
+
+      it 'does not merge the merge request' do
+        expect(MergeWorker).not_to receive(:perform_async)
+
+        service.trigger(conflict_pipeline)
+      end
+
+      it 'creates todos for unmergeability' do
+        expect_any_instance_of(TodoService).to receive(:merge_request_became_unmergeable).with(mr_conflict)
+
+        service.trigger(conflict_pipeline)
+      end
+    end
   end
 
   describe "#cancel" do