def test_register_set_second_byte(self) -> None:
r = MIIRegister(3, 4)
r.set_byte(1, 0xCC)
assert len(r.as_bytes()) == 2
assert r.as_bytes()[0] == 0
assert r.as_bytes()[1] == 0xCC
assert r.get_byte(0) == r.as_bytes()[0]
assert r.get_byte(1) == r.as_bytes()[1]
assert r.as_number() == 0xCC00
assert r.as_number(signed=True) == -13312
def test_register_set_both_bytes(self) -> None:
r = MIIRegister(3, 4)
r.set_byte(0, 0xCC)
r.set_byte(1, 0xDD)
assert len(r.as_bytes()) == 2
assert r.as_bytes()[0] == 0xCC
assert r.as_bytes()[1] == 0xDD
assert r.get_byte(0) == r.as_bytes()[0]
assert r.get_byte(1) == r.as_bytes()[1]
assert r.as_number() == 0xDDCC
def test_register_set_first_byte(self) -> None:
r = MIIRegister(3, 4)
r.set_byte(0, 100)
assert len(r.as_bytes()) == 2
assert r.as_bytes()[0] == 100
assert r.as_bytes()[1] == 0
assert r.get_byte(0) == r.as_bytes()[0]
assert r.get_byte(1) == r.as_bytes()[1]
assert r.as_number() == 100
assert r.as_number(signed=True) == 100