Fix bug in fileutils tests

Author: theartful

tests/test_fileutils.py

@@ -8,6 +8,7 @@
 from boltons.fileutils import FilePerms, iter_find_files
 
 
+# Directory of boltons source files (not ending with '/').
 BOLTONS_PATH = os.path.dirname(os.path.abspath(fileutils.__file__))
 
 
@@ -31,13 +32,13 @@ def test_fileperms():
 
 def test_iter_find_files():
     def _to_baseless_list(paths):
-        return [p.lstrip(BOLTONS_PATH) for p in paths]
+        return [p.removeprefix(BOLTONS_PATH) for p in paths]
 
-    assert 'fileutils.py' in _to_baseless_list(iter_find_files(BOLTONS_PATH, patterns=['*.py']))
+    assert '/fileutils.py' in _to_baseless_list(iter_find_files(BOLTONS_PATH, patterns=['*.py']))
 
     boltons_parent = os.path.dirname(BOLTONS_PATH)
-    assert 'fileutils.py' in _to_baseless_list(iter_find_files(boltons_parent, patterns=['*.py']))
-    assert 'fileutils.py' not in _to_baseless_list(iter_find_files(boltons_parent, patterns=['*.py'], max_depth=0))
+    assert '/fileutils.py' in _to_baseless_list(iter_find_files(boltons_parent, patterns=['*.py']))
+    assert '/fileutils.py' not in _to_baseless_list(iter_find_files(boltons_parent, patterns=['*.py'], max_depth=0))
 
 
 def test_rotate_file_no_rotation(tmp_path):