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#!/usr/bin/env python
#
# Copyright 2006,2007,2010,2012 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio 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, or (at your option)
# any later version.
#
# GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
from gnuradio import gr, gr_unittest
import digital_swig as digital
import math
import random
def make_random_int_tuple(L, min, max):
result = []
for x in range(L):
result.append(random.randint(min, max))
return tuple(result)
class test_diff_encoder (gr_unittest.TestCase):
def setUp (self):
self.tb = gr.top_block ()
def tearDown (self):
self.tb = None
def test_diff_encdec_000(self):
random.seed(0)
modulus = 2
src_data = make_random_int_tuple(1000, 0, modulus-1)
expected_result = src_data
src = gr.vector_source_b(src_data)
enc = digital.diff_encoder_bb(modulus)
dec = digital.diff_decoder_bb(modulus)
dst = gr.vector_sink_b()
self.tb.connect(src, enc, dec, dst)
self.tb.run() # run the graph and wait for it to finish
actual_result = dst.data() # fetch the contents of the sink
self.assertEqual(expected_result, actual_result)
def test_diff_encdec_001(self):
random.seed(0)
modulus = 4
src_data = make_random_int_tuple(1000, 0, modulus-1)
expected_result = src_data
src = gr.vector_source_b(src_data)
enc = digital.diff_encoder_bb(modulus)
dec = digital.diff_decoder_bb(modulus)
dst = gr.vector_sink_b()
self.tb.connect(src, enc, dec, dst)
self.tb.run() # run the graph and wait for it to finish
actual_result = dst.data() # fetch the contents of the sink
self.assertEqual(expected_result, actual_result)
def test_diff_encdec_002(self):
random.seed(0)
modulus = 8
src_data = make_random_int_tuple(40000, 0, modulus-1)
expected_result = src_data
src = gr.vector_source_b(src_data)
enc = digital.diff_encoder_bb(modulus)
dec = digital.diff_decoder_bb(modulus)
dst = gr.vector_sink_b()
self.tb.connect(src, enc, dec, dst)
self.tb.run() # run the graph and wait for it to finish
actual_result = dst.data() # fetch the contents of the sink
self.assertEqual(expected_result, actual_result)
if __name__ == '__main__':
gr_unittest.run(test_diff_encoder, "test_diff_encoder.xml")
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