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#!/usr/bin/env python
#
# Copyright 2018 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#
import os
import tempfile
import array
import pmt
from gnuradio import gr, gr_unittest, blocks
class test_file_source(gr_unittest.TestCase):
@classmethod
def setUpClass(cls):
os.environ['GR_CONF_CONTROLPORT_ON'] = 'False'
cls._datafile = tempfile.NamedTemporaryFile()
cls._datafilename = cls._datafile.name
cls._vector = [x for x in range(1000)]
with open(cls._datafilename, 'wb') as f:
array.array('f', cls._vector).tofile(f)
@classmethod
def tearDownClass(cls):
del cls._vector
del cls._datafilename
del cls._datafile
def setUp(self):
self.tb = gr.top_block()
def tearDown(self):
self.tb = None
def test_file_source(self):
src = blocks.file_source(gr.sizeof_float, self._datafilename)
snk = blocks.vector_sink_f()
self.tb.connect(src, snk)
self.tb.run()
result_data = snk.data()
self.assertFloatTuplesAlmostEqual(self._vector, result_data)
self.assertEqual(len(snk.tags()), 0)
def test_file_source_no_such_file(self):
"""
Try to open a non-existent file and verify exception is thrown.
"""
try:
_ = blocks.file_source(gr.sizeof_float, "___no_such_file___")
self.assertTrue(False)
except RuntimeError:
self.assertTrue(True)
def test_file_source_with_offset(self):
expected_result = self._vector[100:]
src = blocks.file_source(
gr.sizeof_float,
self._datafilename,
offset=100)
snk = blocks.vector_sink_f()
self.tb.connect(src, snk)
self.tb.run()
result_data = snk.data()
self.assertFloatTuplesAlmostEqual(expected_result, result_data)
self.assertEqual(len(snk.tags()), 0)
def test_source_with_offset_and_len(self):
expected_result = self._vector[100:100 + 600]
src = blocks.file_source(
gr.sizeof_float,
self._datafilename,
offset=100,
len=600)
snk = blocks.vector_sink_f()
self.tb.connect(src, snk)
self.tb.run()
result_data = snk.data()
self.assertFloatTuplesAlmostEqual(expected_result, result_data)
self.assertEqual(len(snk.tags()), 0)
def test_file_source_can_seek_after_open(self):
src = blocks.file_source(gr.sizeof_float, self._datafilename)
self.assertTrue(src.seek(0, os.SEEK_SET))
self.assertTrue(src.seek(len(self._vector) - 1, os.SEEK_SET))
# Seek past end of file - this will also log a warning
self.assertFalse(src.seek(len(self._vector), os.SEEK_SET))
# Negative seek - this will also log a warning
self.assertFalse(src.seek(-1, os.SEEK_SET))
self.assertTrue(src.seek(1, os.SEEK_END))
self.assertTrue(src.seek(len(self._vector), os.SEEK_END))
# Seek past end of file - this will also log a warning
self.assertFalse(src.seek(0, os.SEEK_END))
self.assertTrue(src.seek(0, os.SEEK_SET))
self.assertTrue(src.seek(1, os.SEEK_CUR))
# Seek past end of file - this will also log a warning
self.assertFalse(src.seek(len(self._vector), os.SEEK_CUR))
def test_begin_tag(self):
expected_result = self._vector
src = blocks.file_source(gr.sizeof_float, self._datafilename)
src.set_begin_tag(pmt.string_to_symbol("file_begin"))
snk = blocks.vector_sink_f()
self.tb.connect(src, snk)
self.tb.run()
result_data = snk.data()
self.assertFloatTuplesAlmostEqual(expected_result, result_data)
self.assertEqual(len(snk.tags()), 1)
def test_begin_tag_repeat(self):
expected_result = self._vector + self._vector
src = blocks.file_source(gr.sizeof_float, self._datafilename, True)
src.set_begin_tag(pmt.string_to_symbol("file_begin"))
head = blocks.head(gr.sizeof_float, 2 * len(self._vector))
snk = blocks.vector_sink_f()
self.tb.connect(src, head, snk)
self.tb.run()
result_data = snk.data()
self.assertFloatTuplesAlmostEqual(expected_result, result_data)
tags = snk.tags()
self.assertEqual(len(tags), 2)
self.assertEqual(str(tags[0].key), "file_begin")
self.assertEqual(str(tags[0].value), "0")
self.assertEqual(tags[0].offset, 0)
self.assertEqual(str(tags[1].key), "file_begin")
self.assertEqual(str(tags[1].value), "1")
self.assertEqual(tags[1].offset, 1000)
if __name__ == '__main__':
gr_unittest.run(test_file_source)
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