How to add command line argument for particular tests subdirectory?

[shareefj]

Hi,

I have a subset of tests where I want to apply a command line argument specific to those tests. The argument defines a file that should be loaded by a fixture.

I've been trying to use addinivalue_line from within pytest_configure but this doesn't seem to work. How is this supposed to be used?

As a simple example of what I'm trying to do here is an example conftest.py at the top level of my tests directory:

def pytest_addoption(parser):
    parser.addoption(
        "--ping",
        action="store_true",
        help="ping pong"
    )
    parser.addoption(
        "--pong",
        help="store a word"
    )

def pytest_configure(config):
    if config.getoption("ping"):
        config.addinivalue_line("addopts", "--pong=ball")

and a matching test:

def test_this(request):
    log.info(request.config.inicfg)
    log.info(f"pong={request.config.getoption('pong')}")

I'm expecting that if I add the --ping CLI arg that I then get pong set.

[RonnyPfannschmidt]

pytest_configure happens way after addopts is considered

there is no builtin way to do what you outline

please outline the intended use-case more comprehensible as the minified example is not enough to make a good suggestion

[shareefj]

Ah okay, I see.

I have a fixture that uses a YAML configuration file for a particular feature and this is passed on the command line. So my tests are organised in a hierarchy where only one directory needs to have this command line argument passed and I was trying to dynamically add this to the ini file using conftest.py.

What's an alternate way of specifying command line args dynamically per directory?

[RonnyPfannschmidt]

There isn't a way to do that's,cli args are done before

[shareefj]

I've just done it using pytest_cmdline_preparse but I get a warning that this function is deprecated. Has it been replaced with something else? The documentation here also provides a way to add command line args: https://docs.pytest.org/en/latest/example/simple.html#dynamically-adding-command-line-options