在执行测试之前无法获取pytest命令行参数?

由于测试是在配置阶段之后和测试收集之前(也就是在测试执行之前)收集的,因此 pytest.config 在测试模块中的模块级可用。例子:

# conftest.py
def pytest_addoption(parser):
    parser.addoption('--spam', action='store')

# test_spam.py
import pytest


print(pytest.config.getoption('--spam'))


@pytest.mark.skipif(pytest.config.getoption('--spam') == 'eggs', 
                    reason='spam == eggs')
def test_spam():
    assert True

一起跑步 --spam=eggs 产量:

$ pytest -vs -rs --spam=eggs
============================== test session starts ================================
platform linux -- Python 3.6.5, pytest-3.4.1, py-1.5.3, pluggy-0.6.0 -- /data/gentoo64/usr/bin/python3.6
cachedir: .pytest_cache
rootdir: /data/gentoo64/home/u0_a82/projects/stackoverflow/so-50681407, inifile:
plugins: mock-1.6.3, cov-2.5.1, flaky-3.4.0
collecting 0 items                                                                                                     
eggs
collected 1 item

test_spam.py::test_spam SKIPPED
============================ short test summary info ==============================
SKIP [1] test_spam.py:7: spam == eggs

=========================== 1 skipped in 0.03 seconds =============================

你可以试着那样做

@pytest.mark.skipif(pytest.config.option.some-custom-argument=='foo', 
                    reason='i do not want to run this test')

但为什么不使用标记表达式呢?

如果我理解得对,你可能想看看这个 answer .

建议使用带有 request 对象,并从中读取输入参数值 request.config.getoption("--option_name") 或 request.config.option.name .

代码段(记入ipetrik):

# test.py
def test_name(name):
    assert name == 'almond'


# conftest.py
def pytest_addoption(parser):
    parser.addoption("--name", action="store")

@pytest.fixture(scope='session')
def name(request):
    name_value = request.config.option.name
    if name_value is None:
        pytest.skip()
    return name_value