Fix test isolation for venv

[pradyunsg]

Description

The test isolation logic should be fixed to work for venv. Once such a fix is made, this commit (8981895) should be reverted.

Expected behavior

Tests get isolated properly and correctly handle venv-based environments.

[kritika12298]

Hello, I am Kritika Gupta and I would like to contribute to this issue

[pradyunsg]

Hi @kritika12298!

This is an extremely involved and complicated issue that'll require building an understanding of how venv environments work, how pip's test suite fixtures are set up and how pip's venv test setup works - and why it might be broken.

If you've not contributed to pip before, I suggest you try tackling a different issue. Let me know if you'd like me to suggest an issue to you. :)

[kritika12298]

Yes, please do suggest some easy issue with which I can easily start off.

…

On Sat, Mar 7, 2020 at 5:39 PM Pradyun Gedam ***@***.***> wrote: Hi @kritika12298 <https://github.com/kritika12298>! This is an extremely involved and complicated issue that'll require building an understanding of how venv environments work, how pip's test suite fixtures are set up and how pip's venv test setup works - and why it might be broken. If you've not contributed to pip before, I suggest you try tackling a different issue. Let me know if you'd like me to suggest an issue to you. :) — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#7356?email_source=notifications&email_token=AOL5CDYU433XOVOY3S264ZLRGI2PJA5CNFSM4JN3SOP2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEODXYIY#issuecomment-596081699>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AOL5CDYPERXIGEVKZK5HQSLRGI2PJANCNFSM4JN3SOPQ> .

[ssurbhi560]

Hey @pradyunsg ! I was trying to go through this issue but there is no much discussion over this, so I am having quite trouble in understanding this. Can you please give some context about the problem or any plausible solution that you might have. That'd be a great help. :)