py.test does not start (EBUSY: [Resource device])

Question

Just installed py.test with pip install -U pytest with no errors, however we I'm trying to launch py.test I get error: EBUSY: [Resource device]: listdir('C:\\Users\\Administrator\\AppData\\Local\\Application Data',)

Here is the output:

C:\Users\Administrator>py.test  
========================== test session starts ===========================  
platform win32 -- Python 2.7.3 -- pytest-2.2.4  
collected 0 items / 1 errors  

================================= ERRORS =================================
___________________________ ERROR collecting . ___________________________  
C:\Python27\lib\site-packages\py\_path\common.py:315: in visit  
>       for x in Visitor(fil, rec, ignore, bf, sort).gen(self):  
C:\Python27\lib\site-packages\py\_path\common.py:361: in gen  
>               for p in self.gen(subdir):  
C:\Python27\lib\site-packages\py\_path\common.py:361: in gen  
>               for p in self.gen(subdir):  
C:\Python27\lib\site-packages\py\_path\common.py:361: in gen  
>               for p in self.gen(subdir):  
C:\Python27\lib\site-packages\py\_path\common.py:346: in gen  
>           entries = path.listdir()  
C:\Python27\lib\site-packages\py\_path\local.py:320: in listdir  
>       for name in py.error.checked_call(os.listdir, self.strpath):  
C:\Python27\lib\site-packages\py\_error.py:83: in checked_call  
>           raise cls("%s%r" % (func.__name__, args))  
E           EBUSY: [Resource device]: listdir('C:\\Users\\Administrator\\Ap 
pData\\Local\\Application Data',)  
======================== 1 error in 0.03 seconds =========================

What could that be?

Thanks

Answer 1

Apparently, when py.test is called it starts looking through the files/folders using standard test discovery rules. And some folders have access permissions that limit the access, thus this error occurs.

to use py.test one must first navigate to the folder with test cases.