def METHOD_NAME():
    '''
    test a wind series that has a constant average
    '''
    ts = [(datetime(2015, 1, 1, 1, 0), (10, 0)),
          (datetime(2015, 1, 1, 2, 0), (20, 0)),
          (datetime(2015, 1, 1, 3, 0), (10, 0)),
          (datetime(2015, 1, 1, 4, 0), (20, 0)),
          (datetime(2015, 1, 1, 5, 0), (10, 0)),
          (datetime(2015, 1, 1, 6, 0), (20, 0)),
          (datetime(2015, 1, 1, 7, 0), (10, 0)),
          (datetime(2015, 1, 1, 8, 0), (20, 0)),
          (datetime(2015, 1, 1, 9, 0), (10, 0)),
          (datetime(2015, 1, 1, 10, 0), (20, 0))]
    start_time = datetime(2015, 1, 1, 1)
    model_time = start_time
    running_av = RunningAverage(timeseries=ts)
    running_av.prepare_for_model_run(model_time)
    running_av.prepare_for_model_step(model_time)
    print("running_av")
    print(running_av.ossm.timeseries[:])
    model_time = datetime(2015, 1, 1, 4, 0)
    running_av.prepare_for_model_run(model_time)
    running_av.prepare_for_model_step(model_time)
    print("running_av2")
    print(running_av.ossm.timeseries[:])
    assert np.all(running_av.ossm.timeseries['value']['u'][3:9] == 15)