beaker-rspec failing to test resources with "should_not" matcher

[treydock]

This MAY be a bug with serverspec or specinfra gems, but I was hoping someone here could help me identify the problem.  I wrote some tests that ensure file resources are removed and yumrepo resources are disabled.  I was using older beaker gem and recently updated to latest 1.9.1 to find that my "should_not" matchers all fail. 

      describe yumrepo('centos-scl') do

        it { should exist }

        it { should_not be_enabled }

      end

centos-65-x64 17:29:19$  yum repolist all -C | grep ^centos-scl | grep enabled

centos-65-x64 executed in 0.14 seconds

Exited: 1

      should not be enabled (FAILED - 4)

      should not be enabled (FAILED - 4)

  4) repo_centos class default parameters Yumrepo "centos-scl" should not be enabled

     Failure/Error: it { should_not be_enabled }

       yum repolist all -C | grep ^centos-scl | grep enabled

       expected Yumrepo "centos-scl" not to be enabled

The same false failure occurs for file with "should_not be_file" matcher.

describe file('/etc/yum.repos.d/CentOS-Base.repo') do

  it { should_not be_file }

end

  6) repo_centos class default parameters File "/etc/yum.repos.d/CentOS-Base.repo" should not be file

     Failure/Error: it { should_not be_file }

       test -f /etc/yum.repos.d/CentOS-Base.repo

       expected file? to return false, got #<SpecInfra::CommandResult:0x10eff4498 @stderr="", @stdout="", @exit_signal=nil, @exit_status=1>

     # ./spec/acceptance/01_repo_centos_spec.rb:56

The module I'm working on is at https://github.com/treydock/repo_centos.

Thanks

- Trey