Fix windows tests again

dkist/net/globus/tests/test_transfer.py

@@ -1,4 +1,3 @@
-import os
 from pathlib import Path
 from unittest import mock
 from collections import namedtuple
@@ -85,9 +84,10 @@ def test_start_transfer(mocker, transfer_client, mock_endpoints):
     submit_mock.assert_called_once()
     transfer_manifest = submit_mock.call_args_list[0][0][0]["DATA"]
 
+    # NOTE: These paths should always be posix not platform specific
     for filepath, tfr in zip(file_list, transfer_manifest):
         assert filepath.as_posix() == tfr["source_path"]
-        assert os.path.sep + filepath.name == tfr["destination_path"]
+        assert f"/{filepath.name}" == tfr["destination_path"]
 
 
 def test_start_transfer_src_base(mocker, transfer_client, mock_endpoints):
@@ -102,9 +102,10 @@ def test_start_transfer_src_base(mocker, transfer_client, mock_endpoints):
     submit_mock.assert_called_once()
     transfer_manifest = submit_mock.call_args_list[0][0][0]["DATA"]
 
+    # NOTE: These paths should always be posix not platform specific
     for filepath, tfr in zip(file_list, transfer_manifest):
         assert filepath.as_posix() == tfr["source_path"]
-        assert f"{os.path.sep}b{os.path.sep}" + filepath.name == tfr["destination_path"]
+        assert f"/b/{filepath.name}" == tfr["destination_path"]
 
 
 def test_start_transfer_multiple_paths(mocker, transfer_client, mock_endpoints):