[Twisted-Python] Avoiding network when testing Perspective Broker

[Glyph]

On Oct 26, 2012, at 7:16 AM, Itamar Turner-Trauring <itamar at futurefoundries.com> wrote:

> 
> 
> On Thu, Oct 25, 2012 at 6:32 PM, Glyph <glyph at twistedmatrix.com> wrote:
>  
> There are three (count them, three!) classes called "IOPump" in various Twisted test-support modules.  Please note that unlike the stuff in proto_helpers these are not supported and will likely go away in a future version of Twisted.  However, they do provide a simple demonstration of how to hook up a client and server (calling dataReceived() with what transport.write() produced).
> 
> If you'd like to help Twisted itself, we could really use a patch that cleans up all three of those implementations of IOPump, tests them, documents them, and exposes them in a way that would be beneficial to those writing tests like yours.
> 
> I guess none of the loopback implementations in twisted.protocols.loopback use StringTransport? 

Nope, it has two other transport implementations - _LoopbackTransport and LoopbackRelay; plus, unlike what IOPump does, loopback is written to encourage you to return a Deferred from your test, which is generally a bad idea if you can easily avoid it.

-glyph

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