Can't get pytest to understand command-line arguments on setups

问题

So I have been trying to get pytest to run selenium tests on different environments based on some command-line argument. But it keeps throwing this error:

TypeError: setup_class() takes exactly 2 arguments (1 given)

It seems that it is understanding that setup_class takes 2 arguments, but host is not being passed. Here's the code for setup_class:

def setup_class(cls, host):
        cls.host = host

And here is the conftest.py file:

def pytest_addoption(parser):
    parser.addoption("--host", action="store", default='local',
        help="specify the host to run tests with. local|stage")

@pytest.fixture(scope='class')
def host(request):
    return request.config.option.host

What is strange is that host is being seen by the functions (so if I make a test_function and pass host as a parameter, it gets it just fine), it is just the setup fixtures that are not working.

I looked around and found this, pytest - use funcargs inside setup_module but that doesn't seem to be working (and it is outdated since 2.3.

Does anyone know what I'm doing wrong? Using py.test 2.3.2.

Thanks

回答1:

setup_module/class/method and friends cannot work with pytest fixtures directly. The pytest-2.3 way of doing the equivalent is to use autouse fixtures. If you can it's better to pass fixtures explicitely to test functions or to put a usefixtures marker on a class or module.

回答2:

To access the command line options from inside the setup functions, you can use the pytest.config object. Here is an example... adapt as needed.

import pytest

def setup_module(mod):
    print "Host is %s" % pytest.config.getoption('host')

来源：https://stackoverflow.com/questions/13275738/cant-get-pytest-to-understand-command-line-arguments-on-setups

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python

unit-testing

testing

command-line-arguments

pytest