Fix linting error and linting config

backend/tests/test_db.py

@@ -46,9 +46,8 @@ def database_ctx(db: Database) -> Generator[Database, None, None]:
 
 def test_select_one_executes() -> None:
     db = create_database(None)  # in-memory by default
-    with database_ctx(db):
-        with session_ctx(db) as session:
-            val = session.exec(text("SELECT 1")).scalar_one()
+    with database_ctx(db), session_ctx(db) as session:
+        val = session.exec(text("SELECT 1")).scalar_one()
     assert int(val) == 1
 
 
@@ -56,9 +55,7 @@ def test_in_memory_persists_across_sessions_when_using_staticpool() -> None:
     db = create_database(None)  # in-memory with StaticPool
     with database_ctx(db):
         with session_ctx(db) as s1:
-            s1.exec(
-                text("CREATE TABLE IF NOT EXISTS t (id INTEGER PRIMARY KEY, val TEXT);")
-            )
+            s1.exec(text("CREATE TABLE IF NOT EXISTS t (id INTEGER PRIMARY KEY, val TEXT);"))
             s1.exec(text("INSERT INTO t (val) VALUES (:v)").bindparams(v="hello"))
         with session_ctx(db) as s2:
             got = s2.exec(text("SELECT val FROM t")).scalar_one()
@@ -67,10 +64,9 @@ def test_in_memory_persists_across_sessions_when_using_staticpool() -> None:
 
 def test_sqlite_pragmas_applied() -> None:
     db = create_database(None)
-    with database_ctx(db):
+    with database_ctx(db), session_ctx(db) as session:
         # PRAGMA returns integer 1 when foreign_keys ON
-        with session_ctx(db) as session:
-            fk = session.exec(text("PRAGMA foreign_keys")).scalar_one()
+        fk = session.exec(text("PRAGMA foreign_keys")).scalar_one()
     assert int(fk) == 1
 
 
@@ -82,16 +78,8 @@ def test_rollback_on_exception() -> None:
         # Create table then insert and raise inside the same session to force rollback
         with pytest.raises(RuntimeError):  # noqa: PT012, SIM117
             with session_ctx(db) as s:
-                s.exec(
-                    text(
-                        "CREATE TABLE IF NOT EXISTS t_rb (id INTEGER PRIMARY KEY, val TEXT);"
-                    )
-                )
-                s.exec(
-                    text("INSERT INTO t_rb (val) VALUES (:v)").bindparams(
-                        v="will_rollback"
-                    )
-                )
+                s.exec(text("CREATE TABLE IF NOT EXISTS t_rb (id INTEGER PRIMARY KEY, val TEXT);"))
+                s.exec(text("INSERT INTO t_rb (val) VALUES (:v)").bindparams(v="will_rollback"))
                 # simulate handler error -> should trigger rollback in get_session
                 raise RuntimeError("simulated failure")