Tests: support multi test envs

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (a77127c) 35.22% compared to head (e48b595) 35.22%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #83 +/- ## ======================================= Coverage 35.22% 35.22% ======================================= Files 2414 2414 Lines 124872 124872 ======================================= Hits 43987 43987 Misses 80885 80885 ``` | [Flag](https://app.codecov.io/gh/yanyongyu/githubkit/pull/83/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Ju4tCode) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/yanyongyu/githubkit/pull/83/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Ju4tCode) | `35.22% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Ju4tCode#carryforward-flags-in-the-pull-request-comment) to find out more.

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