[TIP] pytest

James bjlockie at lockie.ca
Sat Oct 15 06:52:10 PDT 2016


Thanks.


On 2016-10-14 02:50 PM, Bruno Oliveira wrote:
>
> Hi James,
>
> Thanks for posting the complete example.
>
> There are some problems here, both general Python problems and some 
> related to how you are using pytest:
>
>  1. |testscript.py| has no access to the |A| function because it
>     doesn’t import it.
>  2. You probably want to declare your fixture in a |conftest.py| file
>     so pytest can make it available for all tests in your test suite.
>  3. You have to first declare your option using the |pytest_addoption|
>     hook.
>  4. Since you intend to provide the value passed in the command line
>     to the tests using a fixture, it is simpler to skip the test in
>     the fixture itself.
>
> Here’s the full example with my suggestions:
>
> |# conftest.py import pytest @pytest.fixture(scope='module') def 
> a(request): value = request.config.getoption("A") if not value: 
> pytest.skip('test needs -A option to run') return value def 
> pytest_addoption(parser): parser.addoption("--A", action="store", 
> default=None, help="a option") # testscript.py def test_foo(a): assert 
> a == '1' |
>
> Running it:
>
> |$ py.test testscript.py -q s 1 skipped in 0.01 seconds $ py.test 
> testscript.py -q --A 1 . 1 passed in 0.01 seconds $ py.test 
> testscript.py -q --A 2 F ================================== FAILURES 
> =================================== __________________________________ 
> test_foo ___________________________________ a = '2' def test_foo(a): 
> > assert a == '1' E assert '2' == '1' E - 2 E + 1 testscript.py:6: 
> AssertionError 1 failed in 0.07 seconds |
>
> Hope that helps,
> Bruno.
>
>>
>
> On Fri, Oct 14, 2016 at 3:07 PM James <bjlockie at lockie.ca 
> <mailto:bjlockie at lockie.ca>> wrote:
>
>
>     Here is the exact code:
>     $ cat testconfig.py
>     import pytest
>
>
>     @pytest.fixture(scope='module')
>     def A(request):
>         return request.config.getoption("--A")
>
>     $ cat testscript.py
>     import pytest
>
>
>     skip_A = pytest.mark.skipif(
>         A(pytest.config.request),
>         reason="need --A option to run"
>     )
>
>
>     $ py.test testscript.py
>     ============================= test session starts
>     ==============================
>     platform linux2 -- Python 2.7.12, pytest-2.8.7, py-1.4.31,
>     pluggy-0.3.1
>     rootdir: /home/rjl/pytest, inifile:
>     collected 0 items / 1 errors
>
>     ==================================== ERRORS
>     ====================================
>     ________________________ ERROR collecting testscript.py
>     ________________________
>     testscript.py:4: in <module>
>         A(pytest.config.request),
>
>     E   NameError: name 'A' is not defined
>     =========================== 1 error in 0.01 seconds
>     ============================
>
>     Instead of doing
>     pytest.config.getoptionmore than one like this:
>     skip_A = pytest.mark.skipif( pytest.config.getoption("--A"),
>     reason="need --A option to run" )
>     I want to do it once in the config file.
>     I might want to use the value of the argument --A elsewhere so I
>     don't want to do getoption many times.
>
>
>     On 2016-10-14 01:16 PM, Bruno Oliveira wrote:
>>
>>     Hi,
>>
>>     After fixing the missing “pytest” import, I get this error:
>>
>>     |foo.py:8: in <module> A(pytest.config.request), E AttributeError:
>>     'Config' object has no attribute 'request' |
>>
>>     Please make sure to post a complete example and state clearly
>>     what your problem is and what you are trying to accomplish.
>>
>>     Cheers,
>>     Bruno.
>>
>>>>
>>     On Fri, Oct 14, 2016 at 2:03 PM James <bjlockie at lockie.ca
>>     <mailto:bjlockie at lockie.ca>> wrote:
>>
>>         I have this in my config file:
>>         @pytest.fixture(scope='module')
>>         def A(request):
>>             return request.config.getoption("--A")
>>
>>         skip_A = pytest.mark.skipif(
>>             A(pytest.config.request),
>>             reason="need --A option to run"
>>         )
>>
>>         but when I run it, it says
>>         E   NameError: name 'A' is not defined
>>
>>         _______________________________________________
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>>
>

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