def test_seed_creates_admin_and_roles(db_session):
    from app.services.seed import seed_if_empty
    from app.models.system import SysUser, SysRole, SysMenu, SysRoleMenu

    seed_if_empty(db_session)
    seed_if_empty(db_session)  # idempotent
    assert db_session.query(SysRole).count() == 3
    assert db_session.query(SysUser).filter_by(username="admin").count() == 1
    assert db_session.query(SysMenu).count() >= 8
    assert db_session.query(SysRoleMenu).count() >= 1