Question

We use py.test in a project and use fixtures for most test cases. But I see no possibility to use fixtures in doctest files.

To give an example with some code snippets: I have a browser fixture in conftest.py like:

@fixture
def browser(request):
    from wsgi_intercept import zope_testbrowser
    browser = zope_testbrowser.WSGI_Browser()
    [...]
    return browser

and use it in the file test_browser.txt like:

>>> browser.open('some_url')
>>> browser.url == 'some_url'
True

But I can’t see a way to get the fixture into a doctest file. Is this possible at all with py.test?

Answer 1

It isn’t supported at the moment. pytest would need to know at collection time which fixtures are going to be used in a doctest. If we can come up with a way to declare which fixtures are going to be used, it shouldn’t be hard to add support to _pytest/doctest.py Maybe it’s also possible to automatically find out which fixtures a doctest needs, not sure.