1 files changed, 13 insertions, 1 deletions
diff --git a/spec/requests/api/merge_requests_spec.rb b/spec/requests/api/merge_requests_spec.rb
index 4b0111df149..10d22189c8d 100644
--- a/spec/requests/api/merge_requests_spec.rb
+++ b/spec/requests/api/merge_requests_spec.rb
@@ -138,7 +138,6 @@ describe API::API, api: true  do
       expect(json_response['work_in_progress']).to be_falsy
       expect(json_response['merge_when_build_succeeds']).to be_falsy
       expect(json_response['merge_status']).to eq('can_be_merged')
-      expect(json_response['user_notes_count']).to be(2)
     end
 
     it "should return merge_request" do
@@ -428,6 +427,19 @@ describe API::API, api: true  do
       expect(json_response['message']).to eq('401 Unauthorized')
     end
 
+    it "returns 409 if the SHA parameter doesn't match" do
+      put api("/projects/#{project.id}/merge_requests/#{merge_request.id}/merge", user), sha: merge_request.source_sha.succ
+
+      expect(response.status).to eq(409)
+      expect(json_response['message']).to start_with('SHA does not match HEAD of source branch')
+    end
+
+    it "succeeds if the SHA parameter matches" do
+      put api("/projects/#{project.id}/merge_requests/#{merge_request.id}/merge", user), sha: merge_request.source_sha
+
+      expect(response.status).to eq(200)
+    end
+
     it "enables merge when build succeeds if the ci is active" do
       allow_any_instance_of(MergeRequest).to receive(:ci_commit).and_return(ci_commit)
       allow(ci_commit).to receive(:active?).and_return(true)