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Viewing changes to scipy/fftpack/tests/test_helper.py

  • Committer: Bazaar Package Importer
  • Author(s): Ondrej Certik
  • Date: 2008-06-16 22:58:01 UTC
  • mfrom: (2.1.24 intrepid)
  • Revision ID: james.westby@ubuntu.com-20080616225801-irdhrpcwiocfbcmt
Tags: 0.6.0-12
http://bugs.debian.org/489149
* The description updated to match the current SciPy (Closes: #489149).
* Standards-Version bumped to 3.8.0 (no action needed)
* Build-Depends: netcdf-dev changed to libnetcdf-dev

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scipy/fftpack/tests/test_helper.py
 
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#!/usr/bin/env python
 
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# Created by Pearu Peterson, September 2002
 
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""" Test functions for fftpack.helper module
 
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"""
 
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__usage__ = """
 
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Build fftpack:
 
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  python setup_fftpack.py build
 
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Run tests if scipy is installed:
 
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  python -c 'import scipy;scipy.fftpack.test(<level>)'
 
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Run tests if fftpack is not installed:
 
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  python tests/test_helper.py [<level>]
 
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"""
 
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import sys
 
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from numpy.testing import *
 
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set_package_path()
 
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from fftpack import fftshift,ifftshift,fftfreq,rfftfreq
 
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restore_path()
 
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from numpy import pi
 
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def random(size):
 
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    return rand(*size)
 
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class test_fftshift(NumpyTestCase):
 
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    def check_definition(self):
 
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        x = [0,1,2,3,4,-4,-3,-2,-1]
 
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        y = [-4,-3,-2,-1,0,1,2,3,4]
 
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        assert_array_almost_equal(fftshift(x),y)
 
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        assert_array_almost_equal(ifftshift(y),x)
 
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        x = [0,1,2,3,4,-5,-4,-3,-2,-1]
 
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        y = [-5,-4,-3,-2,-1,0,1,2,3,4]
 
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        assert_array_almost_equal(fftshift(x),y)
 
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        assert_array_almost_equal(ifftshift(y),x)
 
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    def check_inverse(self):
 
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        for n in [1,4,9,100,211]:
 
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            x = random((n,))
 
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            assert_array_almost_equal(ifftshift(fftshift(x)),x)
 
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class test_fftfreq(NumpyTestCase):
 
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    def check_definition(self):
 
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        x = [0,1,2,3,4,-4,-3,-2,-1]
 
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        assert_array_almost_equal(9*fftfreq(9),x)
 
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        assert_array_almost_equal(9*pi*fftfreq(9,pi),x)
 
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        x = [0,1,2,3,4,-5,-4,-3,-2,-1]
 
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        assert_array_almost_equal(10*fftfreq(10),x)
 
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        assert_array_almost_equal(10*pi*fftfreq(10,pi),x)
 
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class test_rfftfreq(NumpyTestCase):
 
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    def check_definition(self):
 
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        x = [0,1,1,2,2,3,3,4,4]
 
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        assert_array_almost_equal(9*rfftfreq(9),x)
 
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        assert_array_almost_equal(9*pi*rfftfreq(9,pi),x)
 
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        x = [0,1,1,2,2,3,3,4,4,5]
 
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        assert_array_almost_equal(10*rfftfreq(10),x)
 
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        assert_array_almost_equal(10*pi*rfftfreq(10,pi),x)
 
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if __name__ == "__main__":
 
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    NumpyTest().run()