Allow streaming io objects into Gitaly

This allows us to set the encoding of an IO passed without reading it
into memory.

This is useful if we want to stream files into Gitaly. Like we do when
uploading a new file to the repository.

1 files changed, 11 insertions, 2 deletions

diff --git a/spec/lib/gitlab/encoding_helper_spec.rb b/spec/lib/gitlab/encoding_helper_spec.rb
index 429816efec3..88ea98eb1e1 100644
--- a/spec/lib/gitlab/encoding_helper_spec.rb
+++ b/spec/lib/gitlab/encoding_helper_spec.rb
@@ -189,14 +189,23 @@ describe Gitlab::EncodingHelper do
     end
   end
 
-  describe '#binary_stringio' do
+  describe '#binary_io' do
     it 'does not mutate the original string encoding' do
       test = 'my-test'
 
-      io_stream = ext_class.binary_stringio(test)
+      io_stream = ext_class.binary_io(test)
 
       expect(io_stream.external_encoding.name).to eq('ASCII-8BIT')
       expect(test.encoding.name).to eq('UTF-8')
     end
+
+    it 'returns a copy of the IO with the correct encoding' do
+      test = fixture_file_upload('spec/fixtures/doc_sample.txt').to_io
+
+      io_stream = ext_class.binary_io(test)
+
+      expect(io_stream.external_encoding.name).to eq('ASCII-8BIT')
+      expect(test).not_to eq(io_stream)
+    end
   end
 end