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What does --no-skip do in nose?

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  What does --no-skip do in nose? roy@panix.com (Roy Smith) - 2013-12-31 12:49 -0500
    Re: What does --no-skip do in nose? Chris Angelico <rosuav@gmail.com> - 2014-01-01 11:14 +1100
    Re: What does --no-skip do in nose? Ned Batchelder <ned@nedbatchelder.com> - 2013-12-31 20:50 -0500

#62936 — What does --no-skip do in nose?

Environment:
  Python 2.7.3
  nose 1.3.0
  Ubuntu 12.04 Linux

I'm befuddled about how test skipping, and in particular, --no-skip,
is supposed to work in nose.  I've got a trivial test file:

> from nose import SkipTest
> def test_skip():
>     raise SkipTest
>     assert 0

If I run this, it skips the test, as expected:


> $ nosetests try.py
> S
> ----------------------------------------------------------------------
> Ran 1 test in 0.001s
> 
> OK (SKIP=1)


What's confusing is, if I use --no-skip, it STILL skips the test:

> $ nosetests --no-skip try.py
> 
> ----------------------------------------------------------------------
> Ran 1 test in 0.001s
> 
> OK

The only difference is it doesn't print the "S".  Am I just
mis-understanding what --no-skip is supposed to do?

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#62941

On Wed, Jan 1, 2014 at 4:49 AM, Roy Smith <roy@panix.com> wrote:
>> from nose import SkipTest
>> def test_skip():
>>     raise SkipTest
>>     assert 0
>
> What's confusing is, if I use --no-skip, it STILL skips the test:
>

I don't know nosetests, but I'm fairly sure it's not going to be
mangling the Python language itself. Once you say "raise", the rest of
the code isn't going to run. If you were calling "skip_test()", then I
could imagine it either raising SkipTest or not based on a
command-line parameter, but if there's no such function and you
directly raise the exception, there's not a lot else Python can do.

ChrisA

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#62943

On 12/31/13 12:49 PM, Roy Smith wrote:
> Environment:
>    Python 2.7.3
>    nose 1.3.0
>    Ubuntu 12.04 Linux
>
> I'm befuddled about how test skipping, and in particular, --no-skip,
> is supposed to work in nose.  I've got a trivial test file:
>
>> from nose import SkipTest
>> def test_skip():
>>      raise SkipTest
>>      assert 0
>
> If I run this, it skips the test, as expected:
>
>
>> $ nosetests try.py
>> S
>> ----------------------------------------------------------------------
>> Ran 1 test in 0.001s
>>
>> OK (SKIP=1)
>
>
> What's confusing is, if I use --no-skip, it STILL skips the test:
>
>> $ nosetests --no-skip try.py
>>
>> ----------------------------------------------------------------------
>> Ran 1 test in 0.001s
>>
>> OK
>
> The only difference is it doesn't print the "S".  Am I just
> mis-understanding what --no-skip is supposed to do?
>

I don't understand why, but my tests confirm what you found: if a test 
raises SkipTest, then it is marked as an S, and included in the count of 
tests run.  If you run with --no-skip, then the result of the test isn't 
displayed in the dots at all, but the test is still included in the 
total count:

$ nosetests
F.S
======================================================================
FAIL: test_fail (test_foo.Test)
----------------------------------------------------------------------
Traceback (most recent call last):
   File "/Users/ned/lab/test_foo.py", line 8, in test_fail
     assert 0
AssertionError

----------------------------------------------------------------------
Ran 3 tests in 0.004s

FAILED (SKIP=1, failures=1)

$ nosetests --no-skip
F.
======================================================================
FAIL: test_fail (test_foo.Test)
----------------------------------------------------------------------
Traceback (most recent call last):
   File "/Users/ned/lab/test_foo.py", line 8, in test_fail
     assert 0
AssertionError

----------------------------------------------------------------------
Ran 3 tests in 0.003s

FAILED (failures=1)


-- 
Ned Batchelder, http://nedbatchelder.com

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