Convert multiple tests into pytest.mark.parametrize

[tomschr]

pytest.mark.parametrize has some benefits over multiple asserts:

• each test can be selected individually
• test code is just a one-liner
• adding more tests is just a matter of putting more data into the list
• gives you a more impressive amount of test cases 😉

It works for me and creates 91 tests

[scls19fr]

Hi @tomschr

this PR can't be merged because of conflicting file (tests.py which is now test_semver.py)
Could you rebase ?
I will be very please to merge your PR and close #77

Kind regards

[tomschr]

@scls19fr I hope I did it right, I've rebased my fork and fixed conflicts in the test_semver.py file. If you like, you can squash them later. See commit a3cd83e.

Hope it make sense? 😃

[scls19fr]

Thanks @tomschr for your great responsiveness!
Could you also add entry to https://github.com/k-bx/python-semver/blob/master/CHANGELOG for a 2.8.1 version

Something like

Version 2.8.1 (WIP)
=============
:Released: 2018-mm-dd
:Maintainer: Sébastien Celles <s.celles@gmail.com>

* Issue #77 (PR #47). Parametrize tests.

Thanks again

[tomschr]

@scls19fr No problem. I've updated the CHANGELOG in commit ae9208a. Hope this helps. 😉

[tomschr]

Argh, sorry, I've overlooked the version, need to correct it in the next commit.

[scls19fr]

Please add WIP or work in progress next to 2.8.1 so it will be very clear that this version haven't been released currently.
You can also change https://github.com/k-bx/python-semver/blob/e4e9e558bf3e1d2cd5f41a58bf4fc48ca5ae424a/semver.py#L9
so we will be ready for next release.

[tomschr]

Please add WIP or work in progress next to 2.8.1 so it will be very clear that this version haven't been released currently.

Done in commit f29c9bb

You can also change python-semver/semver.py __version__

Done in commit 58d0fcf

[scls19fr]

Thanks @tomschr for your contribution
Closes #77