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# Copyright 2012 Knowledge Economy Developments Ltd
#
# Henry Gomersall
# heng@kedevelopments.co.uk
#
# 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/>.
from pyfftw import n_byte_align, n_byte_align_empty, is_n_byte_aligned
import numpy
from timeit import Timer
from .test_pyfftw_base import run_test_suites
import unittest
class NByteAlignTest(unittest.TestCase):
def __init__(self, *args, **kwargs):
super(NByteAlignTest, self).__init__(*args, **kwargs)
if not hasattr(self, 'assertRaisesRegex'):
self.assertRaisesRegex = self.assertRaisesRegexp
def setUp(self):
return
def tearDown(self):
return
def test_n_byte_align_empty(self):
shape = (10,10)
# Test a few alignments and dtypes
for each in [(3, 'float64'),
(7, 'float64'),
(9, 'float32'),
(16, 'int64'),
(24, 'bool'),
(23, 'complex64'),
(63, 'complex128'),
(64, 'int8')]:
n = each[0]
b = n_byte_align_empty(shape, n, dtype=each[1])
self.assertTrue(b.ctypes.data%n == 0)
self.assertTrue(b.dtype == each[1])
def test_n_byte_align(self):
shape = (10,10)
a = numpy.random.randn(*shape)
# Test a few alignments
for n in [3, 7, 9, 16, 24, 23, 63, 64]:
b = n_byte_align(a, n)
self.assertTrue(b.ctypes.data%n == 0)
def test_integer_shape(self):
shape = 100
a = numpy.random.randn(shape)
# Test a few alignments
for n in [3, 7, 9, 16, 24, 23, 63, 64]:
b = n_byte_align(a, n)
self.assertTrue(b.ctypes.data%n == 0)
def test_is_n_byte_aligned(self):
a = n_byte_align_empty(100, 16)
self.assertTrue(is_n_byte_aligned(a, 16))
a = n_byte_align_empty(100, 5)
self.assertTrue(is_n_byte_aligned(a, 5))
a = n_byte_align_empty(100, 16, dtype='float32')[1:]
self.assertFalse(is_n_byte_aligned(a, 16))
self.assertTrue(is_n_byte_aligned(a, 4))
def test_is_n_byte_aligned_fail_with_non_array(self):
a = [1, 2, 3, 4]
self.assertRaisesRegex(TypeError, 'Invalid array',
is_n_byte_aligned, a, 16)
def test_n_byte_align_fail_with_non_array(self):
a = [1, 2, 3, 4]
self.assertRaisesRegex(TypeError, 'Invalid array',
n_byte_align, a, 16)
def test_n_byte_align_consistent_data(self):
shape = (10,10)
a = numpy.int16(numpy.random.randn(*shape)*16000)
b = numpy.float64(numpy.random.randn(*shape))
c = numpy.int8(numpy.random.randn(*shape)*255)
# Test a few alignments
for n in [3, 7, 9, 16, 24, 23, 63, 64]:
d = n_byte_align(a, n)
self.assertTrue(numpy.array_equal(a, d))
d = n_byte_align(b, n)
self.assertTrue(numpy.array_equal(b, d))
d = n_byte_align(c, n)
self.assertTrue(numpy.array_equal(c, d))
def test_n_byte_align_different_dtypes(self):
shape = (10,10)
a = numpy.int16(numpy.random.randn(*shape)*16000)
b = numpy.float64(numpy.random.randn(*shape))
c = numpy.int8(numpy.random.randn(*shape)*255)
# Test a few alignments
for n in [3, 7, 9, 16, 24, 23, 63, 64]:
d = n_byte_align(a, n)
self.assertTrue(d.ctypes.data%n == 0)
self.assertTrue(d.__class__ == a.__class__)
d = n_byte_align(b, n)
self.assertTrue(d.ctypes.data%n == 0)
self.assertTrue(d.__class__ == b.__class__)
d = n_byte_align(c, n)
self.assertTrue(d.ctypes.data%n == 0)
self.assertTrue(d.__class__ == c.__class__)
def test_n_byte_align_set_dtype(self):
shape = (10,10)
a = numpy.int16(numpy.random.randn(*shape)*16000)
b = numpy.float64(numpy.random.randn(*shape))
c = numpy.int8(numpy.random.randn(*shape)*255)
# Test a few alignments
for n in [3, 7, 9, 16, 24, 23, 63, 64]:
d = n_byte_align(a, n, dtype='float32')
self.assertTrue(d.ctypes.data%n == 0)
self.assertTrue(d.dtype == 'float32')
d = n_byte_align(b, n, dtype='float32')
self.assertTrue(d.ctypes.data%n == 0)
self.assertTrue(d.dtype == 'float32')
d = n_byte_align(c, n, dtype='float64')
self.assertTrue(d.ctypes.data%n == 0)
self.assertTrue(d.dtype == 'float64')
test_cases = (
NByteAlignTest,)
test_set = None
if __name__ == '__main__':
run_test_suites(test_cases, test_set)
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