adjusting globals before doctests

[mattip]

numpy doctests sometimes use np i.e. they assume import numpy as np was run before the tests How can this be done in pytest?

[RonnyPfannschmidt]

currently there is no builtin support, the "easy" way is to just copy the plugin

i propose adding a doctestrunner fxture thats module scoped and can be modified by autouse fixtures

[RonnyPfannschmidt]

@mattip any more info ?

[mattip]

No. I am not a pytest power user, I don't know how to "copy the plugin" (what plugin, where to copy it to?) nor do I know how to even begin to approach the second thing you said.

[RonnyPfannschmidt]

@mattip i see,

my proposal would be to introduce a pytest_doctest_namespace fixture,

then you would be able to do the following in a conftest.py

import pytest
import numpy

@pytest.fixture(autouse=True)
def add_numpy(pytest_doctest_namespace):
  """autouse fixture to automatically add numpy access to doctest tests"""
  doctest_namespace['np'] = numpy

@nicoddemus any comments on that idea

[nicoddemus]

Looks good to me! 👍

[nicoddemus]

Merged in #1428, thanks to @milliams!