test_regridding.py 1.37 KB
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# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# Copyright(C) 2013-2018 Max-Planck-Society
#
# NIFTy is being developed at the Max-Planck-Institut fuer Astrophysik
# and financially supported by the Studienstiftung des deutschen Volkes.

import unittest
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from itertools import product
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from test.common import expand
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from numpy.testing import assert_allclose
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import nifty5 as ift


class Regridding_Tests(unittest.TestCase):
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    @expand(
        product([
            ift.RGSpace(8, distances=12.9),
            ift.RGSpace(59, distances=.24, harmonic=True),
            ift.RGSpace([12, 3])
        ]))
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    def test_value(self, s):
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        Regrid = ift.RegriddingOperator(s, s.shape)
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        f = ift.from_random('normal', Regrid.domain)
        assert_allclose(f.to_global_data(), Regrid(f).to_global_data())