1 files changed, 18 insertions, 1 deletions
diff --git a/spec/lib/backup/repositories_spec.rb b/spec/lib/backup/repositories_spec.rb
index d77b1e0f276..85818038c9d 100644
--- a/spec/lib/backup/repositories_spec.rb
+++ b/spec/lib/backup/repositories_spec.rb
@@ -4,7 +4,8 @@ require 'spec_helper'
 
 RSpec.describe Backup::Repositories do
   let(:progress) { spy(:stdout) }
-  let(:strategy) { spy(:strategy) }
+  let(:parallel_enqueue) { true }
+  let(:strategy) { spy(:strategy, parallel_enqueue?: parallel_enqueue) }
 
   subject { described_class.new(progress, strategy: strategy) }
 
@@ -80,6 +81,22 @@ RSpec.describe Backup::Repositories do
       end
     end
 
+    context 'concurrency with a strategy without parallel enqueueing support' do
+      let(:parallel_enqueue) { false }
+
+      it 'enqueues all projects sequentially' do
+        expect(Thread).not_to receive(:new)
+
+        expect(strategy).to receive(:start).with(:create)
+        projects.each do |project|
+          expect(strategy).to receive(:enqueue).with(project, Gitlab::GlRepository::PROJECT)
+        end
+        expect(strategy).to receive(:wait)
+
+        subject.dump(max_concurrency: 2, max_storage_concurrency: 2)
+      end
+    end
+
     [4, 10].each do |max_storage_concurrency|
       context "max_storage_concurrency #{max_storage_concurrency}", quarantine: 'https://gitlab.com/gitlab-org/gitlab/-/issues/241701' do
         let(:storage_keys) { %w[default test_second_storage] }