如何在tox中设置环境变量？

Question

我有 tox 2.9.1

$ tox --version
2.9.1 imported from /Library/Python/2.7/site-packages/tox/__init__.pyc
registered plugins:
    tox-pyenv-1.1.0 at /Library/Python/2.7/site-packages/tox_pyenv.pyc

文件结构和内容如下所示

$ tree .
.
├── setup.py
├── test_env.py
└── tox.ini

0 directories, 3 files

setup.py

$ cat setup.py
from setuptools import setup

setup(name="Tox Testing")

tox.ini

$ cat tox.ini
[tox]
envlist = py35
setenv =
    XYZ = 123

[testenv]
deps=pytest
commands=py.test

test_env.py

$ cat test_env.py
import os

def test_env():
    assert os.getenv('XYZ') == 123

当我运行tox命令时，我的测试失败了。

$ tox -v
using tox.ini: /private/tmp/testing/tox.ini
using tox-2.9.1 from /Library/Python/2.7/site-packages/tox/__init__.pyc
GLOB sdist-make: /private/tmp/testing/setup.py
  /private/tmp/testing$ /usr/bin/python /private/tmp/testing/setup.py sdist --formats=zip --dist-dir /private/tmp/testing/.tox/dist >/private/tmp/testing/.tox/log/tox-0.log
py35 reusing: /private/tmp/testing/.tox/py35
py35 inst-nodeps: /private/tmp/testing/.tox/dist/Tox Testing-0.0.0.zip
  /private/tmp/testing$ /private/tmp/testing/.tox/py35/bin/pip install -U --no-deps /private/tmp/testing/.tox/dist/Tox Testing-0.0.0.zip >/private/tmp/testing/.tox/py35/log/py35-16.log
  /private/tmp/testing$ /private/tmp/testing/.tox/py35/bin/pip freeze >/private/tmp/testing/.tox/py35/log/py35-17.log
py35 installed: py==1.4.34,pytest==3.2.3,Tox-Testing==0.0.0
py35 runtests: PYTHONHASHSEED='3929104870'
py35 runtests: commands[0] | py.test
  /private/tmp/testing$ /private/tmp/testing/.tox/py35/bin/py.test
================================================================================ test session starts ================================================================================
platform darwin -- Python 3.5.2, pytest-3.2.3, py-1.4.34, pluggy-0.4.0
rootdir: /private/tmp/testing, inifile:
collected 1 item

test_env.py F

===================================================================================== FAILURES ======================================================================================
_____________________________________________________________________________________ test_env ______________________________________________________________________________________

    def test_env():
>       assert os.getenv('XYZ') == 123
E       AssertionError: assert None == 123
E        +  where None = <function getenv at 0x1053daae8>('XYZ')
E        +    where <function getenv at 0x1053daae8> = os.getenv

test_env.py:4: AssertionError
============================================================================= 1 failed in 0.11 seconds ==============================================================================
ERROR: InvocationError: '/private/tmp/testing/.tox/py35/bin/py.test'
______________________________________________________________________________________ summary ______________________________________________________________________________________
ERROR:   py35: commands failed

从 setenv 的文档来看，它应该设置环境变量。

- Nilesh

Answer 1

setenv 必须在 [testenv] 节点中使用：

[tox]
envlist = py35

[testenv]
deps=pytest
commands=py.test
setenv =
    XYZ = 123

- phd

---

我希望在所有的测试环境中设置相同的环境变量。这个变量不能直接定义在[tox]部分下吗？ - fredrik

@fredrik 在 [tox] 下不可能。可以在 [testenv] 和任何其他测试环境 [testenv:*] 下实现。 - phd

我找到了一个解决方案，将声明放在[base]下面，并添加了另一种答案。 - fredrik

Answer 2

根据文档，你可以让测试环境从[base] 中继承值。

[tox]
envlist =
    test1
    test2

[base]
setenv =
    XYZ = 123

[testenv:test1]
deps=pytest
commands=py.test
setenv =
    {[base]setenv}

[testenv:test2]
deps=pytest
commands=py.test
setenv =
    {[base]setenv}

- fredrik

Answer 3

您可以使用以下方式将所有环境变量传递给测试：

[testenv]
passenv = XYZ

- adranale