GH36236 - Additional Test for df.join()
TST

- [x] closes #36263 
- [ ] tests added / passed
- [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them
- [ ] whatsnew entry

Hello @kasmith11! Thanks for updating this PR. We checked the lines you've touched for [PEP 8](https://www.python.org/dev/peps/pep-0008) issues, and found:



There are currently no PEP 8 issues detected in this Pull Request. Cheers! :beers: 

##### Comment last updated at 2021-09-27 14:22:52 UTC @github-actions pre-commit Hi @kasmith11. Thanks for the PR!
Is there a particular issue you're trying to address? Hello @debnathshoham I wanted to contribute a test for the [following issue](https://github.com/pandas-dev/pandas/issues/36263). Awesome! Could you please make the title to more informative.
And mark closes #36263 in the OP. @debnathshoham done! @github-actions pre-commit This pull request is stale because it has been open for thirty days with no activity. Please update or respond to this comment if you're still interested in working on this. Thanks for the pull request, but it appears to have gone stale and the added test is still not passing the CI. If you'd like to continue, please merge master and we can reopen.