def test_walk_back(self):
        sc = ServiceCalendar()
        sc.add_period( 0, 1*3600*24, ['WKDY'] )
        tz = Timezone()
        tz.add_period( TimezonePeriod(0, 1*3600%24, 0) )
        
        hb = HeadwayBoard("WKDY", sc, tz, 0, "tr1", 200, 1000, 50)
        
        s0 = State(1,0)
        s1 = hb.walk(s0, WalkOptions())
        s2 = hb.walk_back(s1, WalkOptions())
        assert s2.trip_id == None
dataset/ETHPy150Open bmander/graphserver/pygs/test/unit_test/test_headwayboard.py/TestHeadwayBoard.test_walk_back/operator `*` -> `%`