This has been discussed a bit before 
<https://groups.google.com/forum/#!topic/elm-discuss/Y5PyRsWLPKs>, I think, 
but I couldn't find any real solution. I'm trying to understand how to test 
my update function, and in particular how to test it when one call may 
produce new Cmds which I also want to process.

It seems simple enough to test a single call to update: just pass in a Msg 
and a Model and check the Model that's returned. Ideally, though, I'd like 
to be able to a) check the msgs in the resulting Cmd and b) route those 
messages through update as well. It seems that if I can do (a) then I could 
do (b) straightforwardly.

Is there a way to do this? Even if I can't explicitly inspect the contents 
of the Cmd, is there a way to "route" that Cmd back to my update function?

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