testing: parlib: fix empty upload for small objects

For objects with file size less than 100 MiB, we use a direct PUT
request to send the data, rather than a multipart upload. However,
rather than passing the block of data that we already read from the file
(first_chunk), we are reading from the now exhausted file, so we always
upload empty data. Fix this so that we get correct uploads.

Signed-off-by: Stephen Brennan <[email protected]>

Author: brenns10

testing/parlib.py

@@ -360,7 +360,7 @@ def put_object(
         """
         first_block = data.read(chunk_size)
         if len(first_block) < chunk_size:
-            self.put_object_raw(key, data.read())
+            self.put_object_raw(key, first_block)
         else:
             self.put_object_multipart(
                 key, data, chunk_size, first_block=first_block