[issue16473] Minor difference in decoding quoted-printable text
Alejandro Javier Peralta Frías
report at bugs.python.org
Wed Nov 14 22:22:06 CET 2012
New submission from Alejandro Javier Peralta Frías:
New to python-dev; I grab a beginner tasks "increase test coverage" and I decided to add coverage to this bit of code in the quopri module:
# quopri.py
L138 while n > 0 and line[n-1:n] in b" \t\r":
L139 n = n-1
As far as I understand to get into that while-loop the line to decode should end in " \t\r\n".
So the I added the following test:
def test_decodestring_badly_enconded(self):
e = b"hello \t\r\n"
p = b"hello\n"
s = self.module.decodestring(e)
self.assertEqual(s, p)
but that only passes when the module doesn't use binascii. In fact I change test_quopri to use support.import_fresh_module to disable binascii and removed a decorator that was used.
The decode text when binascci is used is:
>>> quopri.decodestring("hello \t\r\n")
'hello \t\r\n'
which differs from
>>> quopri.a2b_qp = None
>>> quopri.b2a_qp = None
>>> quopri.decodestring("hello \t\r\n")
'hello\n
And what's the deal with:
>>> import quopri
>>> quopri.encodestring("hello \t\r")
'hello \t\r'
>>> "hello \t\r".encode("quopri")
'hello=20=09\r'
----------
components: Tests
files: test_quopri.diff
keywords: patch
messages: 175593
nosy: aleperalta
priority: normal
severity: normal
status: open
title: Minor difference in decoding quoted-printable text
versions: Python 3.3
Added file: http://bugs.python.org/file27985/test_quopri.diff
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