[Twisted-Python] Canonical way to run trial with Python3

[Mark Williams]

On Thu, May 17, 2018, at 11:51 PM, Werner Thie wrote:
> Aloha
> 
> Are there any suggestions on how to run trial on a given package to be
> ported to Python 3
>

Use an editable installation.  trial won't automatically find unported modules in an editable installation, but you run it against any package in src/twisted by specifying the fully-qualified pathname.

Perform an editable install of Twisted in a virtual environment within which you'll run trial:

$ mkvirtualenv -p /path/to/python3 /path/to/venv3/
$ /path/to/venv3/bin/pip install -e /path/to/twisted/checkout

Now that virtual environment's trial can test something that isn't ported to Python 3:

$ /path/to/venv3/bin/trial twisted.news
# Lots of failures 

Don't forget to remove the ported package and its tests from notPortedModules when you're done:

https://github.com/twisted/twisted/blob/2b61992249d7c628a2685456e5c1608d75657979/src/twisted/python/_setup.py#L380-L416

Good luck and thanks for your interest in porting more of Twisted to Python 3!

-- 
  Mark Williams
  mrw at enotuniq.org