Feature/cnh

pydantic_br_validator/__init__.py

@@ -25,5 +25,6 @@
     CEPDigits = str
 else:
     from .fields.cnpj_field import *  # noqa
+    from .fields.cnh_field import *  # noqa
     from .fields.cpf_field import *  # noqa
     from .fields.cep_field import *  # noqa

pydantic_br_validator/fields/cnh_field.py

@@ -0,0 +1,16 @@
+from ..validators.cnh_validator import CNHValidator
+from .base_field import BaseDigits
+
+__all__ = ["CNH"]
+
+
+class CNH(BaseDigits):
+    """
+    Only Accepts string of CNH with digits.
+
+    Attributes:
+        number (str): CNH number.
+    """
+
+    format = "cnh"
+    Validator = CNHValidator

pydantic_br_validator/validators/cnh_validator.py

@@ -0,0 +1,50 @@
+import re
+
+from .base_validator import FieldValidator
+
+__all__ = ["CNHValidator"]
+
+
+class CNHValidator(FieldValidator):
+    def __init__(self, cnh: str) -> None:
+        self.cnh = cnh
+
+    def validate(self) -> bool:
+        cnh = re.sub("[^0-9]", "", str(self.cnh))
+
+        if len(set(cnh)) == 1:
+            return False
+
+        if len(cnh) != 11:
+            return False
+
+        first_digit = self._validate_first_digit(cnh)
+        second_digit = self._validate_second_digit(cnh)
+        return cnh[9] == first_digit and cnh[10] == second_digit
+
+    def _validate_first_digit(self, cnh: str) -> str:
+        self.dsc = 0
+        sum = 0
+
+        for i in range(9, 0, -1):
+            sum += int(cnh[9 - i]) * i
+
+        first_digit = sum % 11
+        if first_digit >= 10:
+            first_digit, self.dsc = 0, 2
+        return str(first_digit)
+
+    def _validate_second_digit(self, cnh: str) -> str:
+        sum = 0
+
+        for i in range(1, 10):
+            sum += int(cnh[i - 1]) * i
+
+        rest = sum % 11
+
+        second_digit = rest - self.dsc
+        if second_digit < 0:
+            second_digit += 11
+        if second_digit >= 10:
+            second_digit = 0
+        return str(second_digit)

tests/test_cnh.py

@@ -0,0 +1,101 @@
+from string import ascii_letters
+
+import pytest
+from pydantic import BaseModel, ValidationError
+
+from pydantic_br_validator import (
+    CNH,
+    FieldDigitError,
+    FieldInvalidError,
+    FieldTypeError,
+)
+
+cnh_mock = [
+    "49761142867",
+    "15706519597",
+    "18820839790",
+    "93025633607",
+    "22255370700",
+    "74487688509",
+    "83002264521",
+    "21671642456",
+    "36407284795",
+    "93017746007",
+]
+
+
+@pytest.fixture
+def person():
+    class Person(BaseModel):
+        cnh: CNH
+
+    yield Person
+
+
+@pytest.mark.parametrize("cnh", cnh_mock)
+def test_must_be_string(person, cnh):
+    p1 = person(cnh=cnh)
+    assert isinstance(p1.cnh, str)
+
+
+@pytest.mark.parametrize("cnh", cnh_mock)
+def test_must_accept_only_numbers(person, cnh):
+    p1 = person(cnh=cnh)
+    assert p1.cnh == cnh
+
+
+@pytest.mark.parametrize("cnh", cnh_mock)
+def test_must_fail_when_use_another_type(person, cnh):
+    with pytest.raises(ValidationError) as e:
+        person(cnh=int(cnh))
+    assert FieldTypeError.msg_template in str(e.value)
+
+
+@pytest.mark.parametrize("cnh", cnh_mock)
+def test_must_fail_when_use_invalid_cnh(person, cnh):
+    with pytest.raises(ValidationError) as e:
+        invalid_cnh = cnh[:5] + cnh[6:]
+        person(cnh=invalid_cnh)
+    assert FieldInvalidError.msg_template in str(e.value)
+
+
+@pytest.mark.parametrize("cnh", cnh_mock)
+def test_must_fail_when_use_digits_count_above_cnh(person, cnh):
+    with pytest.raises(ValidationError) as e:
+        person(cnh=cnh * 2)
+    assert FieldInvalidError.msg_template in str(e.value)
+
+
+@pytest.mark.parametrize("cnh", cnh_mock)
+def test_must_fail_when_use_digits_count_below_cnh(person, cnh):
+    with pytest.raises(ValidationError) as e:
+        person(cnh=cnh[:5])
+    assert FieldInvalidError.msg_template in str(e.value)
+
+
+@pytest.mark.parametrize(
+    "cnh",
+    [
+        "00000000000",
+        "11111111111",
+        "22222222222",
+        "33333333333",
+        "44444444444",
+        "55555555555",
+        "66666666666",
+        "77777777777",
+        "88888888888",
+        "99999999999",
+    ],
+)
+def test_must_fail_when_use_sequecial_digits(person, cnh):
+    with pytest.raises(ValidationError) as e:
+        person(cnh=cnh)
+    assert FieldInvalidError.msg_template in str(e.value)
+
+
+def test_must_fail_when_not_use_only_digits(person):
+    with pytest.raises(ValidationError) as e:
+        letters = ascii_letters[:11]
+        person(cnh=letters)
+    assert FieldDigitError.msg_template in str(e.value)