dashboard: test expection on unspported OS

spec/classes/cloud_dashboard_spec.rb

@@ -62,4 +62,17 @@ describe 'cloud::dashboard' do
     it_configures 'openstack dashboard'
   end
 
+  context 'on other platforms' do
+    let :facts do
+      { :osfamily => 'Solaris',
+        :operatingsystemrelease => '10',
+        :concat_basedir         => '/var/lib/puppet/concat' }
+    end
+
+    it 'should fail' do
+      expect { subject }.to  raise_error(/module puppet-horizon doesn't support/)
+    end
+  end
+
+
 end