[pytest-dev] Not running standard pytest collector for file spec/*_spec.py

Bruno Oliveira nicoddemus at gmail.com
Tue Mar 13 06:32:34 EDT 2018

Hi Ringo,

On Tue, Mar 13, 2018 at 4:40 AM Ringo De Smet <ringo.de.smet at ontoforce.com>

> Ronny, Bruno,
> On Mon, Mar 12, 2018 at 8:10 PM, Bruno Oliveira <nicoddemus at gmail.com>
> wrote:
>> Hi Ringo,
>> It is as Ronny said, you can see the code responsible for that here:
>> https://github.com/pytest-dev/pytest/blob/master/_pytest/python.py#L162
>> When the file has a `.py` extension and is one of the "inipaths" (paths
>> given explicitly in the command line), then the `python` plugin will
>> collect that file anyway.
> That's a pitty. Given the pluggability of pytest, each plugin could have a
> way to collect files and offer test suites back to pytest. Isn't there a
> way to specify one of my spec tests without the wrong plugin(s) picking up
> this file?

The only way I can think of right now is to pass `-p no:python` in the
command line to explicitly disable the Python plugin, as you mention.

You can override this by implementing your own `pytest_collect_file` and
>> return non-`None` when a `.py` file inside the specs directory is passed in
>> the command-line.
>  Bruno, my plugin is collecting the file specified on the command line
> correctly, but still the python plugin tries to run it too. That's where it
> goes wrong.

Oh my bad, indeed all return values of `pytest_collect_file` are processed.
This is by design, that allows `--doctest-modules` to process docstrings in
test files (for example).

But looking at your original error more closely:

spec/action_base_spec.py:20: in <module>
    with description('ActionBase') as self:
E   AttributeError: __enter__

It is not clear to me why this is breaking because of the python plugin;
can you share `action_base_spec.py` and your plugin code?

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