[TIP] pytest: different tmppath in subprocesses

[Bruno Oliveira]

Hi Harmut,

I would append the os.getpid() to the existing HOME env var, something like
this:

new_home = os.environ["HOME"] + str(os.getpid())
subprocess.run(..., env={  **os.environ, "HOME": new_home})

Hope this helps!
Bruno.

On Wed, Jun 2, 2021 at 8:08 AM Hartmut Goebel <h.goebel at crazy-compilers.com>
wrote:

> Hi,
>
> not sure whether this is the right place to ask pytest questions.
>
> I'm seeking a way to spawn (within a test-case) two processes
> (multiprocess), each having a different "tmppath". The aim is to have a
> different HOME (within tmppath) set in each of the processes.
>
> Any hints? Thanks in advance.
>
> Ideally I can reuse my fixtures I already have for single-process:
>
> @pytest.hookimpl(trylast=True)  # run after configure for TempPathFactory
> def pytest_configure(config):
>      """
>      Change HOME to point to the base directory for this test session.
>      """
>      global TEST_HOME
>      TEST_HOME = config._tmp_path_factory.getbasetemp()
>      os.environ["HOME"] = str(TEST_HOME)
>
> @pytest.fixture
> def reset_home(tmp_path):
>      os.environ["HOME"] = str(tmp_path)
>
> --
> Regards
> Hartmut Goebel
>
> | Hartmut Goebel          | h.goebel at crazy-compilers.com               |
> | www.crazy-compilers.com | compilers which you thought are impossible |
>
>
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