Refactor NullClassBuilder#generate_class

lib/naught/base_class_initializer.rb

@@ -0,0 +1,29 @@
+module Naught
+  class BaseClassInitializer
+    attr_reader :builder, :base_class
+
+    def initialize(builder)
+      @builder = builder
+      @base_class = builder.base_class
+    end
+
+    def execute(generation_mod, customization_mod)
+      builder = @builder
+      Class.new(base_class) do
+        const_set :GeneratedMethods, generation_mod
+        const_set :Customizations, customization_mod
+        const_set :NULL_EQUIVS, builder.null_equivalents
+        include Conversions
+        remove_const :NULL_EQUIVS
+        Conversions.instance_methods.each do |instance_method|
+          undef_method(instance_method)
+        end
+        const_set :Conversions, Conversions
+
+        include NullObjectTag
+        include generation_mod
+        include customization_mod
+      end
+    end
+  end
+end

lib/naught/null_class_builder.rb

@@ -1,5 +1,6 @@
 require 'naught/basic_object'
 require 'naught/conversions'
+require 'naught/base_class_initializer'
 
 module Naught
   class NullClassBuilder
@@ -38,31 +39,18 @@ def generate_class
       respond_to_any_message unless interface_defined?
       generation_mod    = Module.new
       customization_mod = customization_module # get a local binding
-      builder           = self
 
       apply_operations(operations, generation_mod)
-
-      null_class = Class.new(@base_class) do
-        const_set :GeneratedMethods, generation_mod
-        const_set :Customizations, customization_mod
-        const_set :NULL_EQUIVS, builder.null_equivalents
-        include Conversions
-        remove_const :NULL_EQUIVS
-        Conversions.instance_methods.each do |instance_method|
-          undef_method(instance_method)
-        end
-        const_set :Conversions, Conversions
-
-        include NullObjectTag
-        include generation_mod
-        include customization_mod
-      end
-
+      null_class = initialize_base_class(generation_mod, customization_mod)
       apply_operations(class_operations, null_class)
 
       null_class
     end
 
+    def initialize_base_class(generation_mod, customization_mod)
+      BaseClassInitializer.new(self).execute(generation_mod, customization_mod)
+    end
+
     def method_missing(method_name, *args, &block)
       command_name = command_name_for_method(method_name)
       if Commands.const_defined?(command_name)