Add acceptance tests

[Lothiraldan]

Following of #2207 and #2643, add some "examples" or "acceptance" test files in the acceptance directory.

They are not yet tested automatically.

[coveralls]

Coverage remained the same at 91.824% when pulling cfb369c on Lothiraldan:acceptancetests into 76c55b3 on pytest-dev:master.

[RonnyPfannschmidt]

@Lothiraldan sorry for taking so long on this one, i am under the impression that it needs a bit of discussion but i'm currently swamped with other things

[Lothiraldan]

No problem, I needed them for my own plugin. Could we keep the pull-request open so we don't forget about it and plugins authors might find the pull-request and use them?

[RonnyPfannschmidt]

i#ll keep it open until i get to it

[nicoddemus]

@RonnyPfannschmidt anything else needed here?

[RonnyPfannschmidt]

@nicoddemus this one follows up with an odea of another pr, but i need to detail handling it

[RonnyPfannschmidt]

#2207 just got merged and i'm thinking about how to combine with this one i will probably need a bit more time to get to it

[nicoddemus]

#3623 will probably take this one over or supersede this, correct?

[RonnyPfannschmidt]

@nicoddemus thanks for the note, i will take a look at pulling them over/integrating them after #3623 is merged as it will take a while to sort them from what we have inside our own examples

[nicoddemus]

#3636 has also been merged.

[RonnyPfannschmidt]

@nicoddemus i still need to make time to actually do this ^^

[nicoddemus]

Oh sure, just a gentle ping! 👍

[RonnyPfannschmidt]

now that we have the example dir and moved many more elaborate tests there, i wonder if the tests that helped to inspired the structural idea actually still make sense to move in

[nicoddemus]

I feel the same way, I'll leave up to you to decide. I'm OK with closing this now.

[RonnyPfannschmidt]

@Lothiraldan i want to thank you again from bringing this up and creating it, it had been a valuable source for sorting out the final implementation

however a side-effect of the final implementation was, that it already includes quite a number of elements and thus this initial idea/demo has been superseded by that