[rspec-users] Stubbing Sleep

James Martin jimmymartin at gmail.com
Tue Feb 22 06:13:19 EST 2011

I've recently been playing around with some code that re-runs a block until
either the block returns a non-false value, or a timeout expires:


At first, I thought this was working, as I was just checking the timing of
the examples when returning a true value, however, now it looks like sleep
isn't being stubbed as I expect.

In the final example, the output from RSpec shows the time taken is 1
second, even though it's sleeping for at least the full 10 seconds specified
in the first argument to #do_this.

I can kind of imagine this not working at all, as the code relies on
calculations between two instances of Time.now.

Is there a better way to do this?

I'm really keen to get away from the whole Time.now/sleep combination in my
tests if possible. I was thinking that perhaps a virtual clock would be
better, but then I've still got the sleep issue to deal with.

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