Array#to_h is new in Ruby 2.1, we still support 2.0

lib/diaspora_federation/salmon/xml_payload.rb

@@ -89,7 +89,7 @@ module DiasporaFederation
         # and attached to resulted hash as string. It is intended to build a hash
         # invariable of an Entity definition, in order to support receiving objects
         # from the future versions of Diaspora, where new elements may have been added.
-        data = root_node.element_children.map { |child|
+        data = Hash[root_node.element_children.map { |child|
           xml_name = child.name
           property = klass.class_props.find {|prop| prop[:xml_name].to_s == xml_name }
           if property
@@ -97,7 +97,7 @@ module DiasporaFederation
           else
             [xml_name, child.text]
           end
-        }.to_h
+        }]
 
         Entities::Relayable.verify_signatures(data) if klass.included_modules.include?(Entities::Relayable)
 

lib/diaspora_federation/test.rb

@@ -11,9 +11,9 @@ module DiasporaFederation
     # @param [Entity.Class] klass entity type to sort according to
     # @return [Hash] sorted hash
     def self.sort_hash(data, klass)
-      klass.class_props.map { |prop|
+      Hash[klass.class_props.map { |prop|
         [prop[:name], data[prop[:name]]] unless data[prop[:name]].nil?
-      }.compact.to_h
+      }.compact]
     end
 
     # Generates attributes for entity constructor with correct signatures in it