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#!/usr/bin/env python
#
# Copyright 2006,2007,2010,2012,2013 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#
import random
from gnuradio import gr, gr_unittest, digital, blocks
def make_random_int_list(L, min, max):
result = []
for x in range(L):
result.append(random.randint(min, max))
return list(result)
class test_diff_encoder(gr_unittest.TestCase):
def setUp(self):
random.seed(0)
self.tb = gr.top_block()
def tearDown(self):
self.tb = None
def test_diff_encdec_000(self):
for modulus in (2, 4, 8):
with self.subTest(modulus=modulus):
src_data = make_random_int_list(40000, 0, modulus - 1)
expected_result = src_data
src = blocks.vector_source_b(src_data)
enc = digital.diff_encoder_bb(modulus)
dec = digital.diff_decoder_bb(modulus)
dst = blocks.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)
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