add more object storage specs

lib/gitlab/import_export/uploads_manager.rb

@@ -22,8 +22,6 @@ module Gitlab
         return unless Gitlab::ImportExport.object_storage?
         return if uploads.empty?
 
-        mkdir_p(uploads_export_path)
-
         uploads.each do |upload_model|
           next unless upload_model.file
           next if upload_model.upload.local? # Already copied
@@ -51,7 +49,9 @@ module Gitlab
       end
 
       def download_and_copy(upload)
-        upload_path = File.join(uploads_export_path, upload.filename)
+        mkdir_p(File.join(uploads_export_path, upload.secret))
+
+        upload_path = File.join(uploads_export_path, upload.secret, upload.filename)
 
         File.open(upload_path, 'w') do |file|
           IO.copy_stream(URI.parse(upload.file.url).open, file)

spec/lib/gitlab/import_export/uploads_manager_spec.rb

@@ -4,6 +4,7 @@ describe Gitlab::ImportExport::UploadsManager do
   let(:shared) { project.import_export_shared }
   let(:export_path) { "#{Dir.tmpdir}/project_tree_saver_spec" }
   let(:project) { create(:project) }
+  let(:exported_file_path) { "#{shared.export_path}/uploads/#{upload.secret}/#{File.basename(upload.path)}" }
 
   subject(:manager) { described_class.new(project: project, shared: shared) }
 
@@ -18,7 +19,7 @@ describe Gitlab::ImportExport::UploadsManager do
 
   describe '#copy' do
     context 'when the project has uploads locally stored' do
-      let(:upload) { create(:upload) }
+      let(:upload) { create(:upload, :issuable_upload, :with_file, model: project) }
 
       before do
         project.uploads << upload
@@ -33,7 +34,27 @@ describe Gitlab::ImportExport::UploadsManager do
       it 'copies the file in the correct location when there is an upload' do
         manager.copy
 
-        expect(File).to exist("#{shared.export_path}/uploads/#{File.basename(upload.path)}")
+        expect(File).to exist(exported_file_path)
+      end
+    end
+
+    context 'using object storage' do
+      let!(:upload) { create(:upload, :issuable_upload, :object_storage, model: project) }
+
+      before do
+        stub_feature_flags(import_export_object_storage: true)
+        stub_uploads_object_storage(FileUploader)
+      end
+
+      it 'downloads the file to include in an archive' do
+        fake_uri = double
+
+        expect(fake_uri).to receive(:open).and_return(StringIO.new('File content'))
+        expect(URI).to receive(:parse).and_return(fake_uri)
+
+        manager.copy
+
+        expect(File.read(exported_file_path)).to eq('File content')
       end
     end
   end