Added mark for sequenced execution. Fixes #80

[norraxx]

Added option to mark tests, that shouldn't be executed in parallel mode.

Via: #80

[alfredo-f]

I love this!

How were you able to test this new feature?

[norraxx]

I've downloaded the project, checkout the branch, builded it, installed it, runned tests.

[alfredo-f]

I noticed #92 by @svetlyak40wt implemented a similar feature, and the unit test

tests/test_no_parallel.py

was added. Have you done something similar?

[norraxx]

Oh I see what you're asking for. Nope :-) There is no any test for this feature. Should I add it?

[alfredo-f]

Well it would be a huge plus if you could demonstrate that the feature actually works 🚀

[norraxx]

Ok, but you'll have to wait, give me some time for it. :-)

[norraxx]

First of all, tests as they are in the repository are not working on python3.8.

1. class ThreadLocalFixtureDef is fighting with pytest tmp_path_factory fixture, during the the fixture intialization phase. https://github.com/pytest-dev/pytest/blob/main/src/_pytest/fixtures.py#L1036. If I comment the line, tests will run.
2. test_pytest_html and test_collection_collect_only are broken

Added the simple test.

[norraxx]

@alfredo-f ping

[alfredo-f]

Lgtm

[norraxx]

@kevlened Is this reporistory is not maintained anymore?