fix(tests): isolate SQLite test databases

Co-authored-by: OpenAI/GPT-5.6-Terra <vibecoder@antoineve.me>

tests/conftest.py

@@ -2,6 +2,7 @@ import pytest
 
 from app import create_app
 from app import db as _db
+from tests.in_memory_db import IN_MEMORY_DATABASE_URI, in_memory_engine_options
 
 
 @pytest.fixture
@@ -72,9 +73,12 @@ forfait = 0
         encoding="utf-8",
     )
 
-    application = create_app(config_path=str(config_path))
+    application = create_app(
+        config_path=str(config_path),
+        database_uri=IN_MEMORY_DATABASE_URI,
+        engine_options=in_memory_engine_options(),
+    )
     application.config["TESTING"] = True
-    application.config["SQLALCHEMY_DATABASE_URI"] = "sqlite:///:memory:"
 
     with application.app_context():
         _db.create_all()

tests/in_memory_db.py

@@ -0,0 +1,20 @@
+"""Configuration SQLite mémoire partagée entre fixtures et helpers de tests.
+
+Ce module est volontairement indépendant de ``conftest`` afin d'être
+importable de manière portable, y compris sous ``pytest --import-mode=importlib``
+(où ``conftest`` n'est pas importable comme module ordinaire). Il centralise la
+configuration mémoire partagée entre la fixture ``app`` et les helpers de tests
+qui appellent directement ``create_app(...)``, évitant qu'une factory de test
+initialise accidentellement ``instance/worklog.db``.
+"""
+
+from sqlalchemy.pool import StaticPool
+
+IN_MEMORY_DATABASE_URI = "sqlite:///:memory:"
+
+
+def in_memory_engine_options() -> dict[str, object]:
+    return {
+        "poolclass": StaticPool,
+        "connect_args": {"check_same_thread": False},
+    }

tests/test_app_factory.py

@@ -0,0 +1,11 @@
+import sqlalchemy as sa
+from sqlalchemy.pool import StaticPool
+
+from app import db
+
+
+def test_app_fixture_uses_one_in_memory_database_connection(app):
+    with app.app_context():
+        assert str(db.engine.url) == "sqlite:///:memory:"
+        assert isinstance(db.engine.pool, StaticPool)
+        assert sa.inspect(db.engine).has_table("work_entries")

tests/test_config_loader.py

@@ -1,6 +1,7 @@
 import pytest
 
 from app import create_app
+from tests.in_memory_db import IN_MEMORY_DATABASE_URI, in_memory_engine_options
 
 _MINIMAL_CONFIG = """
 [vehicles.citadine]
@@ -26,7 +27,11 @@ default_motor_vehicle_id = "{vehicle_id}"
 def _create_app_with_home_assistant_config(tmp_path, **values):
     config_path = tmp_path / "config.toml"
     config_path.write_text(_MINIMAL_CONFIG.format(**values), encoding="utf-8")
-    return create_app(config_path=str(config_path))
+    return create_app(
+        config_path=str(config_path),
+        database_uri=IN_MEMORY_DATABASE_URI,
+        engine_options=in_memory_engine_options(),
+    )
 
 
 def test_get_vehicles_returns_configured_vehicles(app):
@@ -164,4 +169,8 @@ timezone = "Europe/Paris"
     )
 
     with pytest.raises(ValueError, match="clé.*manquante"):
-        create_app(config_path=str(config_path))
+        create_app(
+            config_path=str(config_path),
+            database_uri=IN_MEMORY_DATABASE_URI,
+            engine_options=in_memory_engine_options(),
+        )