def test_input_with_crc(self):
""" Test encoding with crc. """
spec = MasterCommandSpec("TE",
[Field.byte("one"), Field.byte("two"), Field.crc()], [])
spec_input = spec.create_input(1, {"one": 255, "two": 128})
self.assertEquals(13, len(spec_input))
self.assertEquals("STRTE\x01\xff\x80C\x01\x7f\r\n", spec_input)
def test_output_wiht_crc(self):
""" Test crc and is_crc functions. """
field = Field.crc()
self.assertEquals('crc', field.name)
self.assertTrue(Field.is_crc(field))
field = Field.padding(1)
self.assertFalse(Field.is_crc(field))
