rspec users - Jan 2012 - Speccing Rack middleware rack-cors

Dear all,

I''d love to spec a piece of Rack middleware I''m using a
project. It''s
middleware providing CORS functionality (https://github.com/cyu/rack-cors , 
0.2.4). The middleware seems to work when I''m cURLing but I
can''t seem to
get it to work with Rspec (2.8.0) and Rails (3.1.3). It looks like the 
middleware is bypassed entirely. 

I tried setting the headers via ''request.env["Origin"] =
"*"'' and sending
it as a third argument to ''get''. See Gist,
https://gist.github.com/1640182,
for the nicely formatted code. Nothing seems to work. What am I doing wrong?

With kind regards,
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I''m now confident the Rack middleware is _not_ bypassed. Awesome! Only
now
I really don''t know what is amiss.
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