basic task order pdf downloads

tests/test_uploader.py

@@ -31,3 +31,19 @@ def test_upload_fails_for_non_pdfs(uploader):
         fs = FileStorage(fp, content_type="text/plain")
         with pytest.raises(UploadError):
             uploader.upload(fs)
+
+
+def test_download_stream(upload_dir, uploader, pdf_upload):
+    # write pdf content to upload file storage and make sure it is flushed to
+    # disk
+    pdf_upload.seek(0)
+    pdf_content = pdf_upload.read()
+    pdf_upload.close()
+    full_path = os.path.join(upload_dir, "abc")
+    with open(full_path, "wb") as output_file:
+        output_file.write(pdf_content)
+        output_file.flush()
+
+    stream = uploader.download_stream("abc")
+    stream_content = b"".join([b for b in stream])
+    assert pdf_content == stream_content