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"""Unit test for KNX scene number."""
import pytest
from xknx.dpt import DPTArray, DPTSceneNumber
from xknx.exceptions import ConversionError, CouldNotParseTelegram
class TestDPTSceneNumber:
"""Test class for KNX scaling value."""
@pytest.mark.parametrize(
("raw", "value"),
[
((0x31,), 50),
((0x3F,), 64),
((0x00,), 1),
],
)
def test_transcoder(self, raw: tuple[int], value: int) -> None:
"""Test parsing and streaming of DPTSceneNumber."""
assert DPTSceneNumber.to_knx(value) == DPTArray(raw)
assert DPTSceneNumber.from_knx(DPTArray(raw)) == value
def test_to_knx_min_exceeded(self) -> None:
"""Test parsing of DPTSceneNumber with wrong value (underflow)."""
with pytest.raises(ConversionError):
DPTSceneNumber.to_knx(DPTSceneNumber.value_min - 1)
def test_to_knx_max_exceeded(self) -> None:
"""Test parsing of DPTSceneNumber with wrong value (overflow)."""
with pytest.raises(ConversionError):
DPTSceneNumber.to_knx(DPTSceneNumber.value_max + 1)
def test_to_knx_wrong_parameter(self) -> None:
"""Test parsing of DPTSceneNumber with wrong value (string)."""
with pytest.raises(ConversionError):
DPTSceneNumber.to_knx("fnord")
def test_from_knx_wrong_parameter(self) -> None:
"""Test parsing of DPTSceneNumber with wrong value (3 byte array)."""
with pytest.raises(CouldNotParseTelegram):
DPTSceneNumber.from_knx(DPTArray((0x01, 0x02, 0x03)))
def test_from_knx_wrong_value(self) -> None:
"""Test parsing of DPTSceneNumber with value which exceeds limits."""
with pytest.raises(ConversionError):
DPTSceneNumber.from_knx(DPTArray((0x64,)))
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