remove temporary directories during tests

Author: willmcgugan

fs/tempfs.py

@@ -86,6 +86,7 @@ def clean(self):
         except Exception as error:
             if not self._ignore_clean_errors:
                 raise errors.OperationFailed(
-                    msg="failed to remove temporary directory", exc=error
+                    msg="failed to remove temporary directory; {}".format(error),
+                    exc=error,
                 )
         self._cleaned = True

tests/test_osfs.py

@@ -28,6 +28,11 @@ def make_fs(self):
 
     def destroy_fs(self, fs):
         self.fs.close()
+        try:
+            shutil.rmtree(fs.getsyspath("/"))
+        except OSError:
+            # Already deleted
+            pass
 
     def _get_real_path(self, path):
         _path = os.path.join(self.fs.root_path, relpath(path))