diff options
Diffstat (limited to 'gr-digital/python/digital/qa_crc32_bb.py')
| -rwxr-xr-x | gr-digital/python/digital/qa_crc32_bb.py | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/gr-digital/python/digital/qa_crc32_bb.py b/gr-digital/python/digital/qa_crc32_bb.py new file mode 100755 index 0000000000..397834ffde --- /dev/null +++ b/gr-digital/python/digital/qa_crc32_bb.py @@ -0,0 +1,147 @@ +#!/usr/bin/env python +# Copyright 2012,2013 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, blocks, digital +import pmt + +class qa_crc32_bb (gr_unittest.TestCase): + + def setUp (self): + self.tb = gr.top_block () + + def tearDown (self): + self.tb = None + + def test_001_crc_len (self): + """ Make sure the output of a CRC set is 4 bytes longer than the input. """ + data = range(16) + tag_name = "len" + tag = gr.gr_tag_t() + tag.offset = 0 + tag.key = pmt.string_to_symbol(tag_name) + tag.value = pmt.from_long(len(data)) + src = blocks.vector_source_b(data, False, 1, (tag,)) + crc = digital.crc32_bb(False, tag_name) + sink = blocks.vector_sink_b() + self.tb.connect(src, crc, sink) + self.tb.run() + # Check that the packets before crc_check are 4 bytes longer that the input. + self.assertEqual(len(data)+4, len(sink.data())) + + def test_002_crc_equal (self): + """ Go through CRC set / CRC check and make sure the output + is the same as the input. """ + data = (0, 1, 2, 3, 4, 5, 6, 7, 8) + tag_name = "len" + tag = gr.gr_tag_t() + tag.offset = 0 + tag.key = pmt.string_to_symbol(tag_name) + tag.value = pmt.from_long(len(data)) + src = blocks.vector_source_b(data, False, 1, (tag,)) + crc = digital.crc32_bb(False, tag_name) + crc_check = digital.crc32_bb(True, tag_name) + sink = blocks.vector_sink_b() + self.tb.connect(src, crc, crc_check, sink) + self.tb.run() + # Check that the packets after crc_check are the same as input. + self.assertEqual(data, sink.data()) + + def test_003_crc_correct_lentag (self): + tag_name = "length" + pack_len = 8 + packets = range(pack_len*2) + tag1 = gr.gr_tag_t() + tag1.offset = 0 + tag1.key = pmt.string_to_symbol(tag_name) + tag1.value = pmt.from_long(pack_len) + tag2 = gr.gr_tag_t() + tag2.offset = pack_len + tag2.key = pmt.string_to_symbol(tag_name) + tag2.value = pmt.from_long(pack_len) + testtag1 = gr.gr_tag_t() + testtag1.offset = 1 + testtag1.key = pmt.string_to_symbol("tag1") + testtag1.value = pmt.from_long(0) + testtag2 = gr.gr_tag_t() + testtag2.offset = pack_len + testtag2.key = pmt.string_to_symbol("tag2") + testtag2.value = pmt.from_long(0) + testtag3 = gr.gr_tag_t() + testtag3.offset = len(packets)-1 + testtag3.key = pmt.string_to_symbol("tag3") + testtag3.value = pmt.from_long(0) + src = blocks.vector_source_b(packets, False, 1, (tag1, tag2, testtag1, testtag2, testtag3)) + crc = digital.crc32_bb(False, tag_name) + sink = blocks.vector_sink_b() + self.tb.connect(src, crc, sink) + self.tb.run() + self.assertEqual(len(sink.data()), 2*(pack_len+4)) + correct_offsets = {'tag1': 1, 'tag2': 12, 'tag3': 19} + tags_found = {'tag1': False, 'tag2': False, 'tag3': False} + for tag in sink.tags(): + key = pmt.symbol_to_string(tag.key) + if key in correct_offsets.keys(): + tags_found[key] = True + self.assertEqual(correct_offsets[key], tag.offset) + if key == tag_name: + self.assertTrue(tag.offset == 0 or tag.offset == pack_len+4) + self.assertTrue(all(tags_found.values())) + + + def test_004_fail (self): + """ Corrupt the data and make sure it fails CRC test. """ + data = (0, 1, 2, 3, 4, 5, 6, 7) + tag_name = "len" + tag = gr.gr_tag_t() + tag.offset = 0 + tag.key = pmt.string_to_symbol(tag_name) + tag.value = pmt.from_long(len(data)) + src = blocks.vector_source_b(data, False, 1, (tag,)) + crc = digital.crc32_bb(False, tag_name) + crc_check = digital.crc32_bb(True, tag_name) + corruptor = blocks.add_const_bb(1) + sink = blocks.vector_sink_b() + self.tb.connect(src, crc, corruptor, crc_check, sink) + self.tb.run() + # crc_check will drop invalid packets + self.assertEqual(len(sink.data()), 0) + + def test_005_tag_propagation (self): + """ Make sure tags on the CRC aren't lost. """ + data = (0, 1, 2, 3, 4, 5, 6, 7, 8, 230, 166, 39, 8) + tag_name = "len" + tag = gr.gr_tag_t() + tag.offset = 0 + tag.key = pmt.string_to_symbol(tag_name) + tag.value = pmt.from_long(len(data)) + testtag = gr.gr_tag_t() + testtag.offset = len(data)-1 + testtag.key = pmt.string_to_symbol('tag1') + testtag.value = pmt.from_long(0) + src = blocks.vector_source_b(data, False, 1, (tag, testtag)) + crc_check = digital.crc32_bb(True, tag_name) + sink = blocks.vector_sink_b() + self.tb.connect(src, crc_check, sink) + self.tb.run() + self.assertEqual([len(data)-5,], [tag.offset for tag in sink.tags() if pmt.symbol_to_string(tag.key) == 'tag1']) + +if __name__ == '__main__': + gr_unittest.run(qa_crc32_bb, "qa_crc32_bb.xml") |