fix: import app inside fixture to avoid collection errors

Move app import inside fixture to prevent module-level import conflicts
when running full test suite

Author: alfonsosastre

tests/test_examples/test_bookings.py

@@ -1,7 +1,6 @@
 # ruff: noqa: E402
 """Tests for the bookings example."""
 
-import importlib
 import sys
 from pathlib import Path
 
@@ -14,27 +13,21 @@
 if example_path_str not in sys.path:
     sys.path.insert(0, example_path_str)
 
-# Import app - reload to avoid caching issues
-if "main" in sys.modules:
-    importlib.reload(sys.modules["main"])
-from main import app  # noqa: E402
-
 CPO_BASE_URL = "/ocpi/cpo/2.3.0/bookings"
 # Base64-encoded token for OCPI 2.3.0 (my-cpo-token-123)
 AUTH_HEADER = {"Authorization": "Token bXktY3BvLXRva2VuLTEyMw=="}
 
 
-@pytest.fixture
+@pytest.fixture(scope="function")
 def client():
-    """Create test client."""
-    # Clear storage between tests
-    # Reload crud module to ensure fresh state
-    if "crud" in sys.modules:
-        importlib.reload(sys.modules["crud"])
+    """Create test client with isolated storage."""
+    # Import here to avoid module-level import issues
+    import main  # noqa: E402
     import crud  # noqa: E402
 
+    # Clear storage before each test
     crud.bookings_storage.clear()
-    return TestClient(app)
+    return TestClient(main.app)
 
 
 @pytest.fixture