[Tests] Fix AttributeError in test_core with Twisted 19

Should be setting header contents to string not ints and latest version
of Twisted raised an error encountering int. Also correct the header
name for setting length.

1 files changed, 1 insertions, 1 deletions

diff --git a/deluge/tests/test_core.py b/deluge/tests/test_core.py
index 5568a39bf..ec6111933 100644
--- a/deluge/tests/test_core.py
+++ b/deluge/tests/test_core.py
@@ -54,7 +54,7 @@ class PartialDownload(Resource):
             common.get_test_data_file('ubuntu-9.04-desktop-i386.iso.torrent'), 'rb'
         ) as _file:
             data = _file.read()
-        request.setHeader(b'Content-Type', len(data))
+        request.setHeader(b'Content-Length', str(len(data)))
         request.setHeader(b'Content-Type', b'application/x-bittorrent')
         if request.requestHeaders.hasHeader('accept-encoding'):
             return compress(data, request)