import os
from pathlib import Path

import pytest


@pytest.fixture(autouse=True)
def mock_openai_api_key() -> None:
    """Set a fake OpenAI API key."""
    os.environ["OPENAI_API_KEY"] = "dummy_key"


@pytest.fixture(autouse=True)
def mock_base_dir(tmp_path: Path) -> None:
    """Set a fake history directory."""
    os.environ["OPENAI_BASE_DIR"] = str(tmp_path / ".llm_chat")