def test_update_4_bits(self):
"""Updating 4 bits"""
crc = heatmiser.CRC16()
assert crc.high == crc.low
crc.extract_bits(4)
assert crc.high == 78
assert crc.low == 155
crc = heatmiser.CRC16()
assert crc.high == crc.low
crc.extract_bits(8)
assert crc.high == 143
assert crc.low == 23
def test_crc16_update(self):
"""check that updates work with other numbers"""
crc = heatmiser.CRC16()
crc.update(4)
assert crc.high == 161
assert crc.low == 116
def test_crc16(self):
"""Test that CRC matches"""
crc = heatmiser.CRC16()
assert crc.high == crc.low