def test_parse_value_with_invalid_length() -> None:
with pytest.raises(ParseError) as exc_info:
Upc.parse("123")
assert (
str(exc_info.value) ==
"Failed to parse '123' as UPC: Expected 6, 7, 8, or 12 digits, got 3.")
def test_parse_upc_e_with_invalid_number_system(number_system: int) -> None:
with pytest.raises(ParseError) as exc_info:
Upc.parse(f"{number_system}425261")
assert str(exc_info.value) == (
f"Invalid UPC-E number system for '{number_system}425261': "
f"Expected 0 or 1, got {number_system}.")
def test_parse_upc_a() -> None:
upc = Upc.parse("042100005264")
assert upc == Upc(
value="042100005264",
format=UpcFormat.UPC_A,
number_system_digit=0,
payload="04210000526",
check_digit=4,
)
def _parse_upc(
value: str,
*,
config: ParseConfig,
queue: ParseQueue,
result: ParseResult,
) -> None:
if result.upc is not None:
return # pragma: no cover
try:
result.upc = Upc.parse(value)
result.upc_error = None
except ParseError as exc:
result.upc = None
result.upc_error = str(exc)
else:
# If UPC, expand and set GTIN on the top-level result.
queue.append((_parse_gtin, result.upc.as_upc_a()))
def test_parse_upc_e_with_invalid_check_digit() -> None:
with pytest.raises(ParseError) as exc_info:
Upc.parse("04252613")
assert (str(exc_info.value) ==
"Invalid UPC-E check digit for '04252613': Expected 4, got 3.")
def test_parse_nonnumeric_value(value: str) -> None:
with pytest.raises(ParseError) as exc_info:
Upc.parse(value)
assert (str(exc_info.value) ==
f"Failed to parse {value!r} as UPC: Expected a numerical value.")
def test_parse_upc_e(value: str, expected: Upc) -> None:
assert Upc.parse(value) == expected
def test_parse_strips_surrounding_whitespace() -> None:
upc = Upc.parse(" \t 042100005264 \n ")
assert upc.value == "042100005264"
format=UpcFormat.UPC_A,
number_system_digit=0,
payload="04210000526",
check_digit=4,
)
@pytest.mark.parametrize(
"value, expected",
[
(
"425261", # Length is 6: Implicit number system 0, no check digit.
Upc(
value="425261",
format=UpcFormat.UPC_E,
number_system_digit=0,
payload="0425261",
check_digit=4,
),
),
(
"1425261", # Length is 7: Explicit number system 1, no check digit.
Upc(
value="1425261",
format=UpcFormat.UPC_E,
number_system_digit=1,
payload="1425261",
check_digit=1,
),
),
(
def test_as_gtin_12(value: str, expected: str) -> None:
assert Upc.parse(value).as_gtin_12() == expected
def test_as_upc_e_when_suppression_is_not_possible() -> None:
with pytest.raises(EncodeError) as exc_info:
Upc.parse("123456789012").as_upc_e()
assert str(exc_info.value
) == "UPC-A '123456789012' cannot be represented as UPC-E."
def test_as_upc_e(value: str, expected: str) -> None:
assert Upc.parse(value).as_upc_e() == expected