"""Pytest session setup.

Redirect the Festival 4D data directory to a throwaway temp dir for the whole test
session, so tests never touch the repo's real ``data/`` (which may hold the demo fixture).
Set before any ``festival4d.config`` import so the paths resolve to the temp dir.
"""

import os
import tempfile

os.environ.setdefault(
    "FESTIVAL4D_DATA_DIR", tempfile.mkdtemp(prefix="festival4d-test-")
)