[rspec-users] Assertions for asynchronous behaviour

Alex Chaffee alex at stinky.com
Tue Sep 13 12:41:54 EDT 2011

Sure. "wait_for" is a method Brian Takita and I originally wrote for
use in Selenium tests, then IIRC it made it into the Selenium gem and
now lots of libraries use it (or their own version -- I make no patent
claim on polling :-)). The wait_for I remember allowed you to
customize the failure message. Let me go see if it's on GitHub or

Ah, here's one:

(Maybe I should put it in Wrong.)

 - A

On Tue, Sep 13, 2011 at 3:56 AM, Matt Wynne <matt at mattwynne.net> wrote:
> Hi all,
> In GOOS[1] they use an assertion called assertEventually which samples the
> system for a success state until a certain timeout has elapsed. This allows
> you to synchronise the tests with asynchronous code.
> Do we have an equivalent of that in the Ruby / RSpec world already? I know
> capybara has wait_until { } but that's fairly rudimentary - the failure
> message isn't very helpful. Is there anything else already out there?
> [1] http://www.growing-object-oriented-software.com/
> cheers,
> Matt
> --
> Freelance programmer & coach
> Author, http://pragprog.com/book/hwcuc/the-cucumber-book (with Aslak
> Hellesøy)
> Founder, http://relishapp.com
> +44(0)7974430184 | http://twitter.com/mattwynne
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Alex Chaffee - alex at stinky.com

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