def is_valid(c, parts):
code = validate(c)
assert code.outcode == parts[0]
assert code.incode == parts[1]
assert code.area == parts[2]
assert code.district == parts[3]
assert code.sector == parts[4]
assert code.unit == parts[5]
assert code.normalised == parts[6]
def test_invalid():
assert validate('ABC DEFG') is None
def test_truncated_outcode():
assert validate('W') is None
def test_truncated_incode():
assert validate('W1A 1A') is None
def test_blank():
assert validate('') is None
