Remove duplicate between memoized and abstract subject class

config/flay.yml

@@ -1,3 +1,3 @@
 ---
 threshold: 18
-total_score: 1161
+total_score: 1164

lib/mutant/subject.rb

@@ -13,7 +13,9 @@ module Mutant
     #
     def mutations
       mutations = [neutral_mutation]
-      generate_mutations(mutations)
+      Mutator.each(node) do |mutant|
+        mutations << Mutation::Evil.new(self, wrap_node(mutant))
+      end
       mutations
     end
     memoize :mutations
@@ -96,7 +98,7 @@ module Mutant
     # @api private
     #
     def source
-      Unparser.unparse(node)
+      Unparser.unparse(wrap_node(node))
     end
     memoize :source
 
@@ -125,21 +127,19 @@ module Mutant
     # @api private
     #
     def neutral_mutation
-      Mutation::Neutral.new(self, node)
+      Mutation::Neutral.new(self, wrap_node(node))
     end
 
-    # Generate mutations
+    # Wrap node into subject specific container
     #
-    # @param [#<<] emitter
+    # @param [Parser::AST::Node] node
     #
-    # @return [undefined]
+    # @return [Parser::AST::Node]
     #
     # @api private
     #
-    def generate_mutations(emitter)
-      Mutator.each(node) do |mutant|
-        emitter << Mutation::Evil.new(self, mutant)
-      end
+    def wrap_node(node)
+      node
     end
 
   end # Subject

lib/mutant/subject/method/instance.rb

@@ -33,17 +33,6 @@ module Mutant
         class Memoized < self
           include AST::Sexp
 
-          # Return source
-          #
-          # @return [String]
-          #
-          # @api private
-          #
-          def source
-            Unparser.unparse(memoizer_node(node))
-          end
-          memoize :source
-
           # Prepare subject for mutation insertion
           #
           # @return [self]
@@ -58,30 +47,6 @@ module Mutant
 
         private
 
-          # Return mutations
-          #
-          # @param [#<<] emitter
-          #
-          # @return [undefined]
-          #
-          # @api private
-          #
-          def generate_mutations(emitter)
-            Mutator.each(node) do |mutant|
-              emitter << Mutation::Evil.new(self, memoizer_node(mutant))
-            end
-          end
-
-          # Return neutral mutation
-          #
-          # @return [Mutation::Neutral]
-          #
-          # @api private
-          #
-          def neutral_mutation
-            Mutation::Neutral.new(self, memoizer_node(node))
-          end
-
           # Return memoizer node for mutant
           #
           # @param [Parser::AST::Node] mutant
@@ -90,7 +55,7 @@ module Mutant
           #
           # @api private
           #
-          def memoizer_node(mutant)
+          def wrap_node(mutant)
             s(:begin, mutant, s(:send, nil, :memoize, s(:args, s(:sym, name))))
           end