Mocking framework

[Brian Guthrie <btguthrie@gmail.com>]

Hi all,

I've taken a stab at building out a mocking framework for ISpec, and
the results are up on my fork at
http://github.com/bguthrie/ioke/tree/master.  Here's what it supports
so far:

 - stubs
 - mocking with simple argument matching (expects("foo") with(5),
expects("foo") with (5, :bar))
 - mocking with number-of-times-called verification
 - ISpec-friendly "foo should receive" syntax or Mocha-friendly "foo
expects" syntax
 - unmocking of the object in question after verification is complete

Example:

it("should make a call to the remote service",
  User should receive("find") with(:all) andReturn([])
) ... ISpec ExpectationNotMet("expected find to be called 1 time(s)")

Here's what's still missing:

 - argument matcher is too simple, so "should not receive" isn't
working well right now
 - simple creation of mock objects (foo = mock(bar: 5)), which may end
up next on my list
 - awkward ISpec runner integration, with potential concurrency
concerns if tests were to run in parallel
 - more advanced mocking features, which I may add in bits in pieces
since I tend not to get too fussy when I use mocking in my own code

Please take a look when you get the chance and let me know what you
think.  I've tried to match Ola's style and produce idiomatic Ioke but
I'm sure there are spots where I'm not going about it in the best
possible way.

Cheers,

Brian