```ruby
require 'spec_helper'

describe 'virtualbox' do

  describe package('virtualbox-4.3') do
    it { should be_installed }
  end
end
```

Make virtualbox test independent of version
user
```ruby
require 'spec_helper'

describe 'virtualbox' do

  describe command('virtualbox -?') do
    its(:exit_status) { should eq 0 }
  end

end
```
assistant