feat(issue-63): Complete cpf with zeros with not 11 digits and test it

this commit allow validate cpf starts with zeros

tests/test_CPF.py

@@ -56,3 +56,17 @@ def test_special_case(self):
         ]
         for cpf, is_valid in cases:
             self.assertEqual(self.cpf.validate(cpf), is_valid)
+
+    def test_add_leading_zeros(self):
+        """Verifica se o método de adicionar zeros à esquerda funciona corretamente."""
+        cases = [
+            ('123456789', '00123456789'),  # 9 digits
+            ('12345678901', '12345678901'),  # 11 digits
+            ('1234567', '00001234567'),  # 7 digits
+        ]
+        for cpf_input, expected_output in cases:
+            self.assertEqual(self.cpf._complete_with_zeros(cpf_input), expected_output)
+
+        # Test if the input is already correct length, it should not add zeros
+        self.assertEqual(self.cpf._complete_with_zeros('00123456789'), '00123456789')
+        self.assertEqual(self.cpf._complete_with_zeros('23456789012'), '23456789012')

validate_docbr/CPF.py

@@ -19,13 +19,15 @@ def validate(self, doc: str = '') -> bool:
         doc = list(self._only_digits(doc))
 
         if len(doc) != 11:
-            return False
+            doc = self._complete_with_zeros(doc)
+            if len(doc) != 11:
+                return False
 
         if not self.repeated_digits and self._check_repeated_digits(doc):
             return False
 
         return self._generate_first_digit(doc) == doc[9] \
-               and self._generate_second_digit(doc) == doc[10]
+            and self._generate_second_digit(doc) == doc[10]
 
     def generate(self, mask: bool = False) -> str:
         """Gerar CPF."""
@@ -76,3 +78,8 @@ def _check_repeated_digits(self, doc: List[str]) -> bool:
         """Verifica se é um CPF com números repetidos.
         Exemplo: 111.111.111-11"""
         return len(set(doc)) == 1
+
+    def _complete_with_zeros(self, doc: list[str]) -> list[str]:
+        """Adiciona zeros a esquerda para completar o CPF."""
+
+        return '0' * (11 - len(doc)) + str(doc)