add proper cleanup for testfiles

Author: JuliaSprenger

neo/test/iotest/test_get_io.py

@@ -5,11 +5,15 @@
 
 def test_list_candidate_ios_non_existant_file():
     # use plexon io suffix for testing here
-    non_existant_file = 'non_existant_folder/non_existant_file.plx'
+    non_existant_file = Path('non_existant_folder/non_existant_file.plx')
+    non_existant_file.unlink(missing_ok=True)
     ios = list_candidate_ios(non_existant_file)
 
     assert ios
 
+    # cleanup
+    non_existant_file.unlink(missing_ok=True)
+
 
 def test_list_candidate_ios_filename_stub():
     # create dummy folder with dummy files
@@ -27,7 +31,11 @@ def test_list_candidate_ios_filename_stub():
 
 def test_get_io_non_existant_file_writable_io():
     # use nixio for testing with writable io
-    non_existant_file = 'non_existant_file.nix'
+    non_existant_file = Path('non_existant_file.nix')
+    non_existant_file.unlink(missing_ok=True)
     io = get_io(non_existant_file)
 
     assert isinstance(io, NixIO)
+
+    # cleanup
+    non_existant_file.unlink(missing_ok=True)