python-stdnum branch master updated. 1.12-9-g0b30c4b

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https://arthurdejong.org/git/python-stdnum/commit/?id=0b30c4b86150e055a87dff21285a40c9d06df4ff

commit 0b30c4b86150e055a87dff21285a40c9d06df4ff
Author: Emmanuel Arias <eamanu@yaerobi.com>
Date:   Thu Jan 9 19:17:37 2020 -0300

    Test Argentinian CUIT type
    
    The first two digits of the CUIT indicate the type of CUIT (personal,
    company or international) and can only have certain values.
    
    Closes https://github.com/arthurdejong/python-stdnum/issues/179
    Closes https://github.com/arthurdejong/python-stdnum/pull/181

diff --git a/stdnum/ar/cuit.py b/stdnum/ar/cuit.py
index 6325dce..89522b2 100644
--- a/stdnum/ar/cuit.py
+++ b/stdnum/ar/cuit.py
@@ -27,16 +27,12 @@
 The CUIT is a taxpayer identification number used for VAT (IVA, Impuesto al
 Valor Agregado) and other taxes.
 
->>> validate('200-5536168-2')
+More information:
+
+* https://es.wikipedia.org/wiki/Clave_Única_de_Identificación_Tributaria
+
+>>> validate('20-05536168-2')
 '20055361682'
->>> validate('2026756539')
-Traceback (most recent call last):
-    ...
-InvalidLength: ...
->>> validate('2026756A393')
-Traceback (most recent call last):
-    ...
-InvalidFormat: ...
 >>> validate('20267565392')
 Traceback (most recent call last):
     ...
@@ -62,6 +58,14 @@ def calc_check_digit(number):
     return '012345678990'[11 - check]
 
 
+# The different types of CUIT that are known
+_cuit_tpes = (
+    '20', '23', '24', '27',     # individuals
+    '30', '33', '34',           # companies
+    '50', '51', '55',           # international purposes
+)
+
+
 def validate(number):
     """Check if the number is a valid CUIT."""
     number = compact(number)
@@ -69,6 +73,8 @@ def validate(number):
         raise InvalidLength()
     if not isdigits(number):
         raise InvalidFormat()
+    if number[:2] not in _cuit_tpes:
+        raise InvalidComponent()
     if calc_check_digit(number[:-1]) != number[-1]:
         raise InvalidChecksum()
     return number
diff --git a/tests/test_ar_cuit.doctest b/tests/test_ar_cuit.doctest
index f015374..511634e 100644
--- a/tests/test_ar_cuit.doctest
+++ b/tests/test_ar_cuit.doctest
@@ -25,6 +25,24 @@ tries to validate a number of numbers that have been found 
online.
 >>> from stdnum.exceptions import *
 
 
+Test some corner cases.
+
+>>> cuit.validate('20-05536168-2')
+'20055361682'
+>>> cuit.validate('2026756539')
+Traceback (most recent call last):
+    ...
+InvalidLength: ...
+>>> cuit.validate('2026756A393')
+Traceback (most recent call last):
+    ...
+InvalidFormat: ...
+>>> cuit.validate('99-05536168-8')
+Traceback (most recent call last):
+    ...
+InvalidComponent: ...
+
+
 These have been found online and should all be valid numbers.
 
 >>> numbers = '''

-----------------------------------------------------------------------

Summary of changes:
 stdnum/ar/cuit.py          | 24 +++++++++++++++---------
 tests/test_ar_cuit.doctest | 18 ++++++++++++++++++
 2 files changed, 33 insertions(+), 9 deletions(-)


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