Merge branch 'id-fix-suggestions' into 'master'

Fix applying suggestion with empty custom message

See merge request gitlab-org/gitlab!24144

app/services/suggestions/apply_service.rb

@@ -96,7 +96,7 @@ module Suggestions
     end
 
     def suggestion_commit_message(project)
-      project.suggestion_commit_message || DEFAULT_SUGGESTION_COMMIT_MESSAGE
+      project.suggestion_commit_message.presence || DEFAULT_SUGGESTION_COMMIT_MESSAGE
     end
 
     def processed_suggestion_commit_message(suggestion)

changelogs/unreleased/id-fix-suggestions.yml

+---
+title: Fix applying the suggestions with an empty custom message
+merge_request: 24144
+author:
+type: fixed

spec/services/suggestions/apply_service_spec.rb

@@ -57,10 +57,22 @@ describe Suggestions::ApplyService do
       end
 
       context 'is not specified' do
-        let(:message) { nil }
+        let(:expected_value) { "Apply suggestion to files/ruby/popen.rb" }
 
-        it 'sets default commit message' do
-          expect(project.repository.commit.message).to eq("Apply suggestion to files/ruby/popen.rb")
+        context 'is nil' do
+          let(:message) { nil }
+
+          it 'sets default commit message' do
+            expect(project.repository.commit.message).to eq(expected_value)
+          end
+        end
+
+        context 'is an empty string' do
+          let(:message) { '' }
+
+          it 'sets default commit message' do
+            expect(project.repository.commit.message).to eq(expected_value)
+          end
         end
       end