def test_lookup_adapter():
adapter = LookupAdapter({'Zero': 0, 'One': 1})
assert adapter._decode(0) == 'Zero'
assert adapter._decode(1) == 'One'
with pytest.raises(ValueError):
adapter._decode(2)
with pytest.raises(KeyError):
adapter._encode('Two')
def _decode(self, value):
# Mask out the "don't care" bit for anything
# that doesn't have the high bit set
if value & 0b1000 == 0:
value &= 0b0011
# Special case for 0b1000 = 12bit
if value == 0b1000:
value = 0b0011
return LookupAdapter._decode(self, value)