ensure compat properties trigger DeprecationWarnings

[RonnyPfannschmidt]

https://github.com/pytest-dev/pytest/blob/master/_pytest/main.py#L191

should do a warnings.warn so we can safely remove later on

[decentral1se]

Is there some policy on adding these warnings (ala Django's deprecation docs)?

Maybe not important on this one in particular ...

[nmundar]

#2088

[nicoddemus]

Is there some policy on adding these warnings (ala Django's deprecation docs)?

Our policy is written here: http://doc.pytest.org/en/latest/backwards-compatibility.html

It is very recent though so we are still maturing it.

[decentral1se]

Oh, nice one, thanks for passing that link @nicoddemus!

[nicoddemus]

Fixed by #2088