def test_chars_padding_added(self):
u = Fields()
u.add(CH(6, 'string'))
u.string = '1234'
data = u.pack()
assert data == bytearray.fromhex('31 32 33 34 00 00')
def test_chars_too_long(self):
u = Fields()
u.add(CH(6, 'string'))
u.string = '1234567' # One byte too long
with pytest.raises(ValueError):
u.pack()
def test_basic_pack(self):
u = Fields()
u.add(CH(4, 'string'))
u.string = '1234'
data = u.pack()
assert data == bytearray.fromhex("31 32 33 34")