def len_input_bytes(self) -> int:
"""The number of RP66V1 bytes to read for one frame of this channel."""
try:
return self.count * RepCode.rep_code_fixed_length(self.rep_code)
except RepCode.ExceptionRepCode as err:
raise ExceptionFrameChannel(
f'len_input_bytes() on variable length Rep Code {self.rep_code}'
) from err
def seek(self, ld: LogicalData) -> None:
"""Increments the logical data without reading any values into the array."""
if len(self.array) != 0:
raise ExceptionFrameChannel('seek() on empty array. This seems like a logical error.')
ld.seek(RepCode.rep_code_fixed_length(self.rep_code) * self.count)
def test_rep_code_fixed_length_raises(rc):
with pytest.raises(RepCode.ExceptionRepCode) as err:
RepCode.rep_code_fixed_length(rc)
assert err.value.args[
0] == f'Representation code {rc} is not fixed length.'
def test_rep_code_fixed_length(rc, expected):
result = RepCode.rep_code_fixed_length(rc)
assert result == expected
