Improve accuracy of departments in fr_FR provider postcode (#1852)

faker/providers/address/fr_FR/__init__.py

@@ -46,7 +46,6 @@ class Provider(AddressProvider):
  address_formats = ("{{street_address}}\n{{postcode}} {{city}}",)
 
  building_number_formats = ("%", "%#", "%#", "%#", "%##")
- postcode_formats = ("#####",)
  countries = (
  "Afghanistan",
  "Afrique du sud",
@@ -467,3 +466,13 @@ def department_number(self) -> str:
  :example: '59'
  """
  return self.department()[0]
+
+ def postcode(self) -> str:
+ """
+ Randomly returns a postcode generated from existing french depertment number.
+ exemple: '33260'
+ """
+ department = self.department_number()
+ if department in ["2A", "2B"]:
+ department = "20"
+ return f"{department}{self.random_number(digits=5 - len(department))}"

tests/providers/test_address.py

@@ -865,6 +865,17 @@ def test_department_number(self, faker, num_samples):
  assert isinstance(department_number, str)
  assert department_number in department_numbers
 
+ def test_postcode(self, faker, num_samples):
+ department_numbers = [dept_num for dept_num, dept_name in FrFrAddressProvider.departments]
+ for _ in range(num_samples):
+ postcode = faker.postcode()
+ assert isinstance(postcode, str)
+ assert (
+ postcode[:3] in department_numbers # for 3 digits deparments number
+ or postcode[:2] == "20" # for Corsica : "2A" or "2B"
+ or postcode[:2] in department_numbers # any other
+ )
+
 
 class TestHeIl:
  """Test he_IL address provider methods"""