fixtures as class attributes

[skraynev]

@nicoddemus @hackebrot Hi all, sorry for the delay. Could you please review the article, mentioned in:
pytest-dev/pytest#2618

[skraynev]

Looks like someone have to merge it :)

[nicoddemus]

@skraynev thanks for the ping, appreciate it!

Hope you don't mind but I made some small changes to grammar and wording in a few places, also changed the second example to show the technique being applied to standard unittest subclasses because I believe this will be the main audience of the article.

Again, thanks for your work on this contribution. @hackebrot would you like to take another look before we merge it?

[skraynev]

I have reviewed it rapidly, so I don't mind to merge it with your improvements 👍

[nicoddemus]

Thanks again @skraynev!

[little-dude]

This is a really useful trick. Would you consider making such auto_inject_fixtures decorator part of pytest itself @nicoddemus ?

[nicoddemus]

Hi @little-dude,

Probably not in my opinion, but I would really love for it to get more prominence somehow...