def test_custom_algorithm():
crcengine.register_algorithm('mycrc8', 0xFFD5, 8, 0, False, 0, 0xFFbc)
assert 'mycrc8' in crcengine.algorithms_available()
params = crcengine.get_algorithm_params('mycrc8')
assert params['poly'] == 0xD5
assert params['seed'] == 0
crcengine.unregister_algorithm('mycrc8')
assert 'mycrc8' not in crcengine.algorithms_available()
with pytest.raises(crcengine.AlgorithmNotFoundError):
crcengine.get_algorithm_params('mycrc8')
def test_custom_algorithm():
crcengine.register_algorithm("mycrc8", 0xFFD5, 8, 0, False, 0, 0xFFBC)
assert "mycrc8" in crcengine.algorithms_available()
params = crcengine.get_algorithm_params("mycrc8")
assert params["poly"] == 0xD5
assert params["seed"] == 0
crcengine.unregister_algorithm("mycrc8")
assert "mycrc8" not in crcengine.algorithms_available()
with pytest.raises(crcengine.AlgorithmNotFoundError):
crcengine.get_algorithm_params("mycrc8")
def generate_tests():
"""Generate the test files for generated code, normally these are checked
in so that the introduction of a regression in enumeration of algorithms
(for example) won't affect the tests run unless they are explicitly
regenerated"""
algorithms = crcengine.algorithms_available()
for alg in algorithms:
print("Generating code for", alg)
crcengine.generate_code(alg, join(C_TEST_HOME, "src"))
crcengine.codegen.generate_test(alg, join(C_TEST_HOME, "test"))
def test_available_algorithms():
assert 'crc32' in crcengine.algorithms_available()
assert 'crc16-xmodem' in crcengine.algorithms_available()
assert 'crc-womble' not in crcengine.algorithms_available()
assert crc16_autosar(b'\x00\x00\x00\x00') == 0x84C0
assert crc16_autosar(b'\xF2\x01\x83') == 0xD374
assert crc16_autosar(b'\x0F\xAA\x00\x55') == 0x2023
assert crc16_autosar(b'\x00\xFF\x55\x11') == 0xB8F9
assert crc16_autosar(b'3"U\xAA\xBB\xCC\xDD\xEE\xFF') == 0xF53F
assert crc16_autosar(b'\x92\x6B\x55') == 0x0745
assert crc16_autosar(b'\xFF\xFF\xFF\xFF') == 0x1D0F
def test_available_algorithms():
assert 'crc32' in crcengine.algorithms_available()
assert 'crc16-xmodem' in crcengine.algorithms_available()
assert 'crc-womble' not in crcengine.algorithms_available()
@pytest.mark.parametrize("algorithm_name", crcengine.algorithms_available())
def test_algorithm_checks(algorithm_name):
"""Check the result of every algorithm against its recorded check-word"""
check_word = crcengine.get_algorithm_params(algorithm_name, True)['check']
crc_alg = crcengine.new(algorithm_name)
assert crc_alg(b'123456789') == check_word,\
'Check CRC mismatch for {}'.format(algorithm_name)
def test_custom_algorithm():
crcengine.register_algorithm('mycrc8', 0xFFD5, 8, 0, False, 0, 0xFFbc)
assert 'mycrc8' in crcengine.algorithms_available()
params = crcengine.get_algorithm_params('mycrc8')
assert params['poly'] == 0xD5
assert params['seed'] == 0
crcengine.unregister_algorithm('mycrc8')
def _generate_algorithms():
algorithms = crcengine.algorithms_available()
for alg in algorithms:
print("Generating code for", alg)
crcengine.generate_code(alg, join(C_TEST_HOME, "src"))
import crcengine
if __name__ == '__main__':
params = crcengine.get_algorithm_params('crc32')
crcengine.generate_code(params, 'out/')
crcengine.generate_code('crc16-xmodem', 'out/')
filename = "out/crc16_xmodem.c"
print("Created {} with the following content:")
with open(filename, "r") as f:
file = f.read()
print(file)
available = crcengine.algorithms_available()
print("\nThe following algorithms are available")
print(", ".join(available))
data = b"123456789"
crc16x = crcengine.new("crc16-xmodem")
result = crc16x.calculate(data)
print("\nThe crc16-xmodem of {} is 0x{:x}".format(data.decode("ascii"),
result))
def test_available_algorithms():
assert "crc32" in crcengine.algorithms_available()
assert "crc16-xmodem" in crcengine.algorithms_available()
assert "crc-womble" not in crcengine.algorithms_available()