Simulating a missing gem in Ruby unit tests

Posted by ktex on Stack Overflow See other posts from Stack Overflow or by ktex
Published on 2010-04-23T08:20:34Z Indexed on 2010/04/23 8:23 UTC
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unit-testing

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ruby

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rubygems

Is there any way to simulate the absence of a gem for certain unit tests, short of actually uninstalling and then reinstalling the gem during testing?

I am writing a command line utility, and want to make sure that my tests cover cases where a user may not have all of the gems that I support. For instance, I am using fsevents — a Leopard-specific package for monitoring filesystem events — that will never be present on other systems, as well as a growl gem that's purely optional.

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