Running test for a file starts different processes for every test function

[stevanmilic]

When running lua require("neotest").run.run(vim.fn.expand("%")) with vim-test, every test case (function) is executed in a different process, causing error behavior if multiple tests are causal in any way e.g. when running pytest on a file in which there are tests that all use the same database – they can't work in parallel.

[zidhuss]

Running in to the same issue with RSpec tests.

When running with lua require("neotest").run.run(vim.fn.expand("%")) tests are running in parallel and failing due to deadlock.

[rcarriga]

Unfortunately due to simplicity of the adapter (it doesn't do any parsing/runner integration) it relies on exit codes to get results for each test and so requires running tests separately. For pytest you should use neotest-python instead. For other runners without adapters I can add an option to not run tests concurrently but then it will be a good bit slower. That's what this adapter is a last resort

[stevanmilic]

Got it, thanks! I assumed it's something like that by reading the README file. I used this plugin instead of neotest-python since I couldn't pass extra arguments to the test command. I tried using extra_args on neotest.run.run(...) but it didn't work. Any suggestions there @rcarriga ? To that remark, is it possible to configure default adapter args, similar to let test#python#pytest#options = '-s --tb=short -p no:warnings' in vim-test?

[rcarriga]

Ah I've fixed the issue with extra args thanks for flagging! Also you can pass an args option to the neotest-python settings which can be a list of strings or a function. Need to add some more documentation :sweat_smile:

[stevanmilic]

@rcarriga args do work right now, but if I have different set of args for pyunit and pytest – how do I specify that? EDIT: A function could be passed, from looking at the code the first param is the runner and this works 🎉 :

require("neotest-python")({
    args = function(runner, _)
        if runner == "pytest" then
            return { "-s", "--tb=short", "-p", "no:warnings" }
        else
            return {}
        end
    end,
})

[stevanmilic]

I've created a PR to document this https://github.com/rcarriga/neotest/pull/16