def test_opendap_grid(self):
        url_template = ('http://opendap.nationaleregenradar.nl/'
                        'thredds/dodsC/radar/TF0005_A/{year}/{month}/01/'
                        'RAD_TF0005_A_{year}{month}01000000.h5')
        memcdf_name = 'precipitation.nc'

        subgrid = python_subgrid.wrapper.SubgridWrapper(mdu=self.mdu)
        python_subgrid.wrapper.logger.setLevel(logging.DEBUG)
        subgrid.start()

        rain_grid = RainGrid(subgrid,
                             url_template,
                             memcdf_name=memcdf_name,
                             initial_value=9.)
        subgrid.subscribe_dataset(memcdf_name)
        rain_grid.fill(1.0)
        s0 = subgrid.get_nd('s1').copy()
        v0 = subgrid.get_nd('vol1').copy()
        for i in range(12):
            subgrid.update(-1)
        s1 = subgrid.get_nd('s1').copy()
        v1 = subgrid.get_nd('vol1').copy()

        print('shape of dps')
        print(subgrid.get_nd('dps').shape)
        print('s0 sum')
        print(np.sum(s0))
        print('s1 sum')
        print(np.sum(s1))
        print('s1-s0 sum')
        print(np.sum(s1 - s0))
        print('v0, v1, v1-v0 sum')
        print(np.sum(v0))
        print(np.sum(v1))
        print(np.sum(v1 - v0))