first commit

tests/conftest.py

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+import pytest
+from fastapi.testclient import TestClient
+from main import create_app # Import the app factory function
+from config import settings # Import settings to monkeypatch
+import os
+
+@pytest.fixture
+def tmp_audio_dir(tmp_path):
+    """Provides a temporary directory for audio caching for each test."""
+    audio_dir = tmp_path / "test_audio_cache"
+    audio_dir.mkdir()
+    return audio_dir
+
+@pytest.fixture
+def app_instance(tmp_audio_dir, monkeypatch):
+    """
+    Provides a fresh FastAPI application instance for each test,
+    with its AUDIO_CACHE_DIR redirected to a temporary location.
+    """
+    monkeypatch.setattr(settings, "AUDIO_CACHE_DIR", str(tmp_audio_dir))
+    app = create_app()
+    return app
+
+@pytest.fixture
+def app_client(app_instance):
+    """Provides a TestClient instance for the FastAPI application."""
+    with TestClient(app_instance) as client:
+        yield client
+
+@pytest.fixture
+def piper_engine(app_instance):
+    """Provides the PiperEngine instance from the registry of the fresh app instance."""
+    # Access the engine registry from the app_instance
+    return app_instance.ENGINE_REGISTRY.get("piper")