Ensure inet6: formatting for a comma-separated list string

Currently the inet6_prefix function recognizes a comma-separated list
as a single string, thus the format is not applied.
This change ensures the value is converted to an array and the format
conversion is properly enforced.

Change-Id: I9a1f452c3797ccbda25865ca78f1e3a24103d070

manifests/resource/authtoken.pp

@@ -294,7 +294,12 @@ define keystone::resource::authtoken(
   }
 
   if !is_service_default($memcached_servers) and !empty($memcached_servers){
-    $memcached_servers_real = join(any2array(inet6_prefix($memcached_servers)), ',')
+    $memcached_servers_array = $memcached_servers ? {
+      String  => split($memcached_servers, ','),
+      default => $memcached_servers
+    }
+    $memcached_servers_real = join(any2array(inet6_prefix($memcached_servers_array)), ',')
+
     if $manage_memcache_package {
       ensure_packages('python-memcache', {
         ensure => present,

spec/defines/keystone_resource_authtoken_spec.rb

@@ -180,13 +180,40 @@ describe 'keystone::resource::authtoken' do
     end
 
     context 'when specifying IPv6 memcached_servers params' do
-      before do
-        params.merge! ({
-          :memcached_servers              => '[fd12:3456:789a:1::1]:11211',
-      })
+      context 'by a string' do
+        before do
+          params.merge! ({
+            :memcached_servers => '[fd12:3456:789a:1::1]:11211',
+          })
+        end
+        it 'configures memcache severs with inet6: prefix in keystone authtoken' do
+          is_expected.to contain_keystone_config('keystone_authtoken/memcached_servers')\
+            .with_value('inet6:[fd12:3456:789a:1::1]:11211')
+        end
+      end
+
+      context 'by a commma-separated string' do
+        before do
+          params.merge! ({
+            :memcached_servers => '[fd12:3456:789a:1::1]:11211,[fd12:3456:789a:1::2]:11211',
+          })
+        end
+        it 'configures memcache severs with inet6: prefix in keystone authtoken' do
+          is_expected.to contain_keystone_config('keystone_authtoken/memcached_servers')\
+            .with_value('inet6:[fd12:3456:789a:1::1]:11211,inet6:[fd12:3456:789a:1::2]:11211')
+        end
       end
-      it 'configures memcache severs with inet6: prefix in keystone authtoken' do
-        is_expected.to contain_keystone_config('keystone_authtoken/memcached_servers').with_value('inet6:[fd12:3456:789a:1::1]:11211')
+
+      context 'by an array' do
+        before do
+          params.merge! ({
+            :memcached_servers => ['[fd12:3456:789a:1::1]:11211', '[fd12:3456:789a:1::2]:11211']
+          })
+        end
+        it 'configures memcache severs with inet6: prefix in keystone authtoken' do
+          is_expected.to contain_keystone_config('keystone_authtoken/memcached_servers')\
+            .with_value('inet6:[fd12:3456:789a:1::1]:11211,inet6:[fd12:3456:789a:1::2]:11211')
+        end
       end
     end