From: Brian Candler <b.candler@...>
Date: 2010-08-02T23:31:17+09:00
Subject: Re: Mocking a method with a block

Fernando Guillen wrote:
> But instead of using the .yields method, that I didn't know about, I 
> tried to mock directly the Net::POP3.start method and this didn't work.

It would be really useful if you could attach arbitrary behaviour to a 
mocked method - perhaps 'returns' with a block:

  m = [1,2,3]
  Net::POP3.expects(:start).returns { m.each { puts m }; m.size }

This is something I've missed badly in the past, and I've ended up 
mocking directly using Object.new and defining singleton methods.
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