Handle nil autorequire results

When encountering results containing nil from an autorequire-family
call, Puppet will skip over them without error but rspec-puppet
results in an error. This aligns rspec-puppet with Puppet's
behavior.

Also, rename the autorelationships spec test so that it runs
properly as part of a 'rake spec' invocation.

Author: seanmil

lib/rspec-puppet/matchers/create_generic.rb

@@ -313,6 +313,8 @@ def relationship_refs(resource, type, visited = Set.new)
           if resource.resource_type.respond_to?(func)
             resource.resource_type.send(func) do |t, b|
               Array(resource.to_ral.instance_eval(&b)).each do |dep|
+                next if dep.nil?
+
                 res = "#{t.to_s.capitalize}[#{dep}]"
                 if r = relationship_refs(res, type, visited)
                   results << res

spec/classes/relationships__type_with_auto.rb renamed to spec/classes/relationships__type_with_auto_spec.rb

@@ -1,8 +1,8 @@
 Puppet::Type.newtype(:type_with_all_auto) do
   ensurable
   newparam(:name, :namevar => true)
-  autobefore(:file) { [File.join(self[:name], 'before')] }
-  autonotify(:file) { [File.join(self[:name], 'notify')] }
-  autorequire(:file) { [File.join(self[:name], 'require')] }
-  autosubscribe(:file) { [File.join(self[:name], 'subscribe')] }
+  autobefore(:file) { [File.join(self[:name], 'before'), nil] }
+  autonotify(:file) { [File.join(self[:name], 'notify'), nil] }
+  autorequire(:file) { [File.join(self[:name], 'require'), nil] }
+  autosubscribe(:file) { [File.join(self[:name], 'subscribe'), nil] }
 end