All the statuses become “not checked”

[32145072]

Hello. I am currently learning about mutation testing .

I tried it after mutmut 3.x was released, but I am having trouble solving the problem where all the statuses become “not checked”.

When I ran mutmut run, I got an error saying failed to collect stats, no active tests found.

The results of the mutmut browse are as follows.

The generated meta file is as follows.

{
    "exit_code_by_key": {
        "fizz_buzz.x_fizz_buzz__mutmut_1": null,
        "fizz_buzz.x_fizz_buzz__mutmut_2": null,
        "fizz_buzz.x_fizz_buzz__mutmut_3": null,
        "fizz_buzz.x_fizz_buzz__mutmut_4": null,
        "fizz_buzz.x_fizz_buzz__mutmut_5": null,
        "fizz_buzz.x_fizz_buzz__mutmut_6": null,
        "fizz_buzz.x_fizz_buzz__mutmut_7": null,
        "fizz_buzz.x_fizz_buzz__mutmut_8": null,
        "fizz_buzz.x_fizz_buzz__mutmut_9": null,
        "fizz_buzz.x_fizz_buzz__mutmut_10": null,
        "fizz_buzz.x_fizz_buzz__mutmut_11": null,
        "fizz_buzz.x_fizz_buzz__mutmut_12": null,
        "fizz_buzz.x_fizz_buzz__mutmut_13": null,
        "fizz_buzz.x_fizz_buzz__mutmut_14": null,
        "fizz_buzz.x_fizz_buzz__mutmut_15": null
    },
    "hash_by_function_name": {
        "fizz_buzz": "b62123013949868a4a537fdf38533c9c"
    }
}

I also tried running it on other projects such as astmonkey, but I was unable to see the correct status. Is there any way to solve this?

About my system: (Please let me know if there is any information missing.)

1. Python version - Python 3.9.20
2. OS - Windows 10
3. wsl - Ubuntu 24.04.1
4. mutmut ver - 3.2.0

[mutmut]
paths_to_mutate=src/
tests_dir=tests/

[pytest]
pythonpath = src

Thank you.

[boxed]

It looks like this project is something you can share with me to take a look at?

[32145072]

Thanks for your quick response.

1. my project

https://github.com/32145072/mutmutissue341 The program from which the screenshot above was taken

2. astmonkey

https://github.com/mutpy/astmonkey/tree/master/astmonkey I put the executable file in the src folder and wrote the setup.cfg in the same way.

[Otto-AA]

I think it works with this in setup.cfg:

...
also_copy=pytest.ini

This will tell mutmut to also copy pytest.ini to the mutants folder.

Maybe we should include this per default in the also_copy list?