add private attribute to fit the implementation of the mocked class (#93

)

The equivalent of the attribute Locker._contains_credential needs to be added to TestLocker to mock it properly.

tests/helpers.py

@@ -43,6 +43,7 @@ def __init__(self, lock: str | Path, local_config: dict[str, Any]) -> None:
         self._content_hash = self._get_content_hash()
         self._locked = False
         self._write = False
+        self._contains_credential = False
 
     def write(self, write: bool = True) -> None:
         self._write = write