CODEWITHSUNDEEP
pythonpytest
Kalyanam Rajashree
Kalyanam Rajashree

Reputation: 712

Errors with pytest

I am using @pytest.mark.parametrize with various testcases and expected outputs. Its passing perfectly fine with few test cases and giving this error with some other cases. Not even able to google it. I want to know what could have gone wrong. I would be glad if someone can tell me how to atleast google for this error !

============================= test session starts ============================= platform win32 -- Python 2.7.12, pytest-3.0.3, py-1.4.31, pluggy-0.4.0 -- c:\python27\python.exe

cachedir: .cache

rootdir: C:\Python27, inifile:

collected 0 items / 1 errors

=================================== ERRORS ====================================

___________________ ERROR collecting test_mod_pppoe_disc.py ___________________

lib\site-packages\py_path\local.py:650: in pyimport

import(modname)

lib\site-packages\pytest-3.0.3-py2.7.egg_pytest\assertion\rewrite.py:131: in find_module

source_stat, co = _rewrite_test(self.config, fn_pypath)

lib\site-packages\pytest-3.0.3-py2.7.egg_pytest\assertion\rewrite.py:322: in _rewrite_test

tree = ast.parse(source)

lib\ast.py:37: in parse

return compile(source, filename, mode, PyCF_ONLY_AST)

E ValueError: invalid \x escape

!!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!! =========================== 1 error in 0.21 seconds ===========================

@pytest.mark.parametrize("test_input1,test_input2,expected", [
(ARP(sha='D\x85\x00\xa2}\xad', spa='\n\xc4@=', tha='\x00\x00\x00\x00\x00\x00', tpa='\n\xc4@\x01'),"<socket._socketobject object at 0x0000000003DC8118>",0),
(ARP(sha='jrofalfeoiexad', spa='\nenkajf@=', tha='\x00\x00\x00\x02jfcalkfel', tpa='\n\xcjfeiafa1'),"<socket._socketobject object at 0x0000000003D2BD48>",0),
(ARP(eioakn iejfoeajoijea),"<socket._socketobject object at 0x0000000003DC8118>",0)
])
def test_mod_arp(test_input1,test_input2,expected):
    assert mod_arp(test_input1,test_input2) == expected

Description about code: This is the code where I was getting error. I have appropriate functions defined. Working fine with first test case. Was failing with last two test cases.

Upvotes: 5

Views: 12760

Answers (2)

Maicon Mauricio
Maicon Mauricio

Reputation: 3001

As I have also answered on this other post:

If you are getting Interrupted: errors during collection, and is using Windows's Powershell, try switching it to CMD, and see if it works.

Upvotes: 0

The Compiler
The Compiler

Reputation: 11939

The example you pasted can be minimized a bit into this file:

import pytest

@pytest.mark.parametrize("foo", ['\n\xcjfeiafa1'])
def test_escapes(foo):
    pass

Which gives us the same error with Python 2, and a clearer error with Python 3:

/usr/lib/python3.5/site-packages/_pytest/python.py:410: in _importtestmodule
    mod = self.fspath.pyimport(ensuresyspath=importmode)
/usr/lib/python3.5/site-packages/py/_path/local.py:650: in pyimport
    __import__(modname)
E     File "/home/florian/tmp/foo.py", line 3
E       @pytest.mark.parametrize("foo", ['\n\xcjfeiafa1'])
E                                       ^
E   SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-4: truncated \xXX escape

The reason this happens is due to your \xcj escape, which is not a valid escape.

Upvotes: 7

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