From: jeem <jeem.hughes@...>
Date: 2005-03-15T23:01:34+09:00
Subject: Re: Mocking new and other class methods

Sorry, I'll try to clarify.

When I type this:

mn=MockNew.new(A)
mn.handle { block }

I'm saying, "Next time someone calls A.new(args), execute this block
instead."  This lets me test code like this:

def methodToTest
  etc
  a = A.new('bob')
  a.etc
end

Usually I want to find some other way to test code like this, but if
A.new or a.etc hits the file system or network, etc., I really want to
be able to sub in a mock.  Often we deal with this by passing in the
object, thus isolating the object creation code.  This still leaves the
creation code untested, and a good place for bugs to hide.