def test_convert_number_chars():
char = Char(bytes([0x0A]))
assert char.size() == 1
assert char.string() == "\n"
assert char.bytes() == bytes([0x0A])
assert char.unprintable()
def test_convert_number_string():
char = Char("7")
assert char.size() == 1
assert char.string() == "7"
assert char.bytes() == bytes([0x37])
assert not char.unprintable()
def test_convert_letter_chars():
char = Char(bytes([0x41]))
assert char.size() == 1
assert char.string() == "A"
assert char.bytes() == bytes([0x41])
assert not char.unprintable()
def test_init():
char = Char()
assert char.size() == 1
assert char.string() is None
assert char.bytes() is None
assert char.unprintable()
def test_empty_string():
char = Char("")
assert char.size() == 1
assert char.string() is None
assert char.bytes() is None
assert char.unprintable()