[Twisted-Python] Global reactor unit tests in the Twisted test suite

[Glyph Lefkowitz]

On Nov 7, 2011, at 10:25 AM, exarkun at twistedmatrix.com wrote:

>> reactor = getUtility(IReactor)?
> 
> That's not really a solution.  It's the barest glimpse of a large system which might be applied as a solution.  Do you want to expand it?

I'd like to echo this request for exposition.  My understanding is that 'getUtility' is just a baroque way to access a global variable, with most of the disadvantages of said globalness intact.  What does it provide that our existing import strategy doesn't?
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