Failing tests: cannot load such file -- rack/test during build in mock

[Axilleas Pipinellis]

Hi,

I am trying to package omniauth[0] and it fails when running
the spec tests in mock. Using rpmbuild works fine.

In particular it fails when calling rack/test, although the package
is in BR and gets installed (as per the root.log).

Same happens when building for f19 (rubygem-rack-1.4.5) and rawhide 
(rubygem-rack-1.5.2) so it is not a version issue.

Here [1] is a koji build with the failed build logs.

Any idea why this could be happening?

Thanks

SPEC: 
http://axilleas.fedorapeople.org/pkgs/rubygem-omniauth/rubygem-omniauth.spec
SRPM: 
http://axilleas.fedorapeople.org/pkgs/rubygem-omniauth/rubygem-omniauth-1.1.4-1.fc19.src.rpm

[0] https://github.com/intridea/omniauth
[1] http://koji.fedoraproject.org/koji/taskinfo?taskID=5669185

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