def METHOD_NAME(fresh_database):
    assert 'dummy_property' in db.get_halo("dummy_sim_1/step.1/halo_1")
    tool = property_deleter.PropertyDeleter()
    tool.parse_command_line("dummy_property -f".split())
    tool.run_calculation_loop()
    s = db.core.get_default_session()
    assert s.query(db.core.HaloProperty).count() == 0