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"""Unit test for KNX/IP TunnellingAck objects."""
import pytest
from xknx.exceptions import CouldNotParseKNXIP
from xknx.knxip import ErrorCode, KNXIPFrame, TunnellingAck
class TestKNXIPTunnellingAck:
"""Test class for KNX/IP TunnellingAck objects."""
def test_tunnelling_ack(self) -> None:
"""Test parsing and streaming tunneling ACK KNX/IP packet."""
raw = bytes((0x06, 0x10, 0x04, 0x21, 0x00, 0x0A, 0x04, 0x2A, 0x17, 0x00))
knxipframe, _ = KNXIPFrame.from_knx(raw)
assert isinstance(knxipframe.body, TunnellingAck)
assert knxipframe.body.communication_channel_id == 42
assert knxipframe.body.sequence_counter == 23
assert knxipframe.body.status_code == ErrorCode.E_NO_ERROR
tunnelling_ack = TunnellingAck(
communication_channel_id=42,
sequence_counter=23,
)
knxipframe2 = KNXIPFrame.init_from_body(tunnelling_ack)
assert knxipframe2.to_knx() == raw
def test_from_knx_wrong_ack_information(self) -> None:
"""Test parsing and streaming wrong TunnellingAck (wrong length byte)."""
raw = bytes((0x06, 0x10, 0x04, 0x21, 0x00, 0x0A, 0x03, 0x2A, 0x17, 0x00))
with pytest.raises(CouldNotParseKNXIP):
KNXIPFrame.from_knx(raw)
def test_from_knx_wrong_ack_information2(self) -> None:
"""Test parsing and streaming wrong TunnellingAck (wrong length)."""
raw = bytes((0x06, 0x10, 0x04, 0x21, 0x00, 0x0A, 0x04, 0x2A, 0x17))
with pytest.raises(CouldNotParseKNXIP):
KNXIPFrame.from_knx(raw)
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