[Twisted-Python] RFC: IPv6 multicast join/ticket 6597

[Cory Benfield]

> On 4 Aug 2016, at 04:59, Jason Litzinger <jlitzingerdev at gmail.com> wrote:
> 
>>>> Testing multicast is ... challenging.  I barely have any idea how to set up a test environment for IPv4, and no idea what to do for IPv6.  If you can speak to this in your tests (and hopefully docs as well) that would be super helpful.
> On that note, one effect of actually testing that a registered socket
> receives data is that, if no interfaces are up, the tests are going to
> start failing (passing tests).
> 
> The existing Multicast test class exibits the same behavior on my
> machine if I take my interfaces down, so can I assume that this is an
> acceptable constraint?  The constraint being that, if no network
> interfaces are up, these tests are going to start failing, at least on
> Linux.

When you say *no* interfaces, do you mean actually no interfaces? As in, no loopback as well?

Cory