#! /usr/bin/env python  import numpy as npfrom numpy.testing import TestCase, assert_almost_equalimport aubio precomputed_arange = [ 9.89949512, -6.44232273,  0., -0.67345482, 0.,        -0.20090288, 0., -0.05070186] precomputed_some_ones = [ 4.28539848,  0.2469689,  -0.14625292, -0.58121818,        -0.83483052, -0.75921834, -0.35168475,  0.24087936,        0.78539824, 1.06532764,  0.97632152,  0.57164496, 0.03688532,        -0.39446154, -0.54619485, -0.37771079] class aubio_dct(TestCase):     def test_init(self):        """ test that aubio.dct() is created with expected size """        a_dct = aubio.dct()        self.assertEqual(a_dct.size, 1024)     def test_arange(self):        """ test that dct(arange(8)) is computed correctly         >>> from scipy.fftpack import dct        >>> a_in = np.arange(8).astype(aubio.float_type)        >>> precomputed = dct(a_in, norm='ortho')        """        N = len(precomputed_arange)        a_dct = aubio.dct(8)        a_in = np.arange(8).astype(aubio.float_type)        a_expected = aubio.fvec(precomputed_arange)        assert_almost_equal(a_dct(a_in), a_expected, decimal=5)     def test_some_ones(self):        """ test that dct(somevector) is computed correctly """        a_dct = aubio.dct(16)        a_in = np.ones(16).astype(aubio.float_type)        a_in[1] = 0        a_in[3] = np.pi        a_expected = aubio.fvec(precomputed_some_ones)        assert_almost_equal(a_dct(a_in), a_expected, decimal=6)     def test_reconstruction(self):        """ test that some_ones vector can be recontructed """        a_dct = aubio.dct(16)        a_in = np.ones(16).astype(aubio.float_type)        a_in[1] = 0        a_in[3] = np.pi        a_dct_in = a_dct(a_in)        a_dct_reconstructed = a_dct.rdo(a_dct_in)        assert_almost_equal(a_dct_reconstructed, a_in, decimal=6)     def test_negative_size(self):        """ test that creation fails with a negative size """        with self.assertRaises(ValueError):            aubio.dct(-1)     def test_wrong_size(self):        """ test that creation fails with a non power-of-two size """        # supports for non 2** fft sizes only when compiled with fftw3        size = 13        try:            with self.assertRaises(RuntimeError):                aubio.dct(size)        except AssertionError:            self.skipTest('creating aubio.dct with size %d did not fail' % size) if __name__ == '__main__':    from unittest import main    main()