Pytest: how to override multiple arguments with same key with -o/--override-ini?

[andreabisello]

this is my pytest.ini

[pytest]
python_files = test_*
python_classes = Test*
python_functions = test_*
addopts = --tc-file=configurations/utenze/andrea-integration.ini --tc-file=configurations/puntamenti/integration.ini

there are two --tc-fle parameters used by https://pypi.org/project/pytest-testconfig/

i would like o overwrite theme using -o

i tried

pytest -o --tc-file=configurations/utenze/andrea-integration.ini --tc-file=configurations/puntamenti/legaltest.ini

i obtain

pytest: error: argument -o/--override-ini: expected one argument

i tried

pytest -o --tc-file=configurations/utenze/andrea-integration.ini -o --tc-file=configurations/puntamenti/legaltest.ini

i obtain the same result.

i can fix the issue creating different .ini file and use -c to load the configuration,
but how i can overwrite parameters with same key?

thanks.

[blueyed]

Sounds like a bug.

For reference:

def pytest_addoption(parser, env=os.environ):
    """ Define the command line options for the plugin. """
    group = parser.getgroup('test-config')
    group.addoption('--tc-file',
                    action='append',
                    dest='testconfig',
                    default=[env.get(env_opt)],
                    help="Configuration file to parse and pass to tests"
                            " [PY_TEST_CONFIG_FILE]")

[RonnyPfannschmidt]

append cli parameters cannot be overridden by the "ini override"

you need to add a own cli parameter which resets the list

[blueyed]

Well, try:

pytest --tc-file=configurations/utenze/andrea-integration.ini --tc-file=configurations/puntamenti/legaltest.ini

-o is for ini options, and there it would be -o foo=bar -o foo=baz (but might not work for lists).

[andreabisello]

in order to understand what is going on,
in my conftest.py i put this

def pytest_configure(config):

    parameters = config.option.testconfig

    if parameters is not None:
        for param in parameters:
            if param is not None:
                print("parametro -> " + param)

my pytest.ini file contains

addopts = --tc-file=configurations/utenze/andrea-integration.ini --tc-file=configurations/puntamenti/integration.ini
my cli command is

pytest --tc-file=configurations/utenze/giordano-integration.ini --tc-file=configurations/puntamenti/integration.ini
running i obtain

parametro -> configurations/utenze/andrea-integration.ini
parametro -> configurations/puntamenti/integration.ini
parametro -> configurations/utenze/giordano-integration.ini
parametro -> configurations/puntamenti/integration.ini

so i understand there are 4 parameters loading : 2 in pytest.ini e 2 in the command line.

my use case is to keep a pytest.ini for running with pycharm and override configuration for continous integration running, selecting the configuration of several environment and users running tests.

so my use case can be solved in a different way , i only need o understand well how to use these parameters.

[RonnyPfannschmidt]

an argparse solution would be to have --reset-tc-file which resets the metavar

[andreabisello]

sorry i'm not able to understand : is this a bug o i'm doing something wrong?
thanks.

[RonnyPfannschmidt]

you are doing something wrong

pytest uses argparse under the hood (which imposes its limitations)
one needs to create a new action with a new cli parameter name to reset the list for a "append"

[blueyed]

Related: https://github.com/pytest-dev/pytest/issues/5127 (but not a good solution by itself, just reminded me of it).

@andreabisello
You can also use an env var to specify the default - so instead of having a / multiple defaults in your config (addopts), maybe control it via that.

Closing the issue here. You might want to consider to follow up in the plugin's issue tracker if necessary.