[U-Boot] [PATCH] test/py: Fix exception, do not parametrize with empty set

[Stephen Warren]

On 10/17/2016 01:18 PM, Brüns, Stefan wrote:
> On Montag, 17. Oktober 2016 12:11:26 CEST Stephen Warren wrote:
>> On 10/16/2016 12:17 PM, Stefan Brüns wrote:
>>> If the parameter set is empty, the pytest setup fails:
>>> ---
>>>
>>>     call: <CallInfo when='setup' exception: got empty parameter set
>>>     ['env__dfu_config'], function test_dfu at [...]test_dfu.py:107>
>>>
>>> ---
>>>
>>> This aborts pytest_runtest_makereport and later leads to an exception
>>> during the report generation, as the call to log.start_section(...)
>>> is never executed:
>>> ---
>>>
>>>     Exception: Block nesting mismatch:
>>>     "test_dfu[env__usb_dev_port0-env__dfu_config0]" ""
>>>
>>> ---
>>
>> How do you trigger this? I believe my test setup has many cases where
>> the test you added would trigger, but without the issues you mention,
>> but I'm not 100% sure since I don't know for sure what is causing this
>> issue.
>>
>> Which pytest version do you have? I appear to have 2.5.1 (on Ubuntu Trusty)
>
> 1. You need "dfu_configs" to be empty
> 2. Maybe its pytest version dependent, IIRC I have 3.0.2
>
> The first error above can be seen when running pytest with "--debug", it is
> written to IIRC pytestdebug.log

Looks like this is a bug in pytest 3, and has been fixed upstream:

https://github.com/pytest-dev/pytest/issues/1849
Pytest 3.0 does not accept empty list in fixture