renaming and test fixing

lib/risc/position/position.rb

@@ -48,6 +48,7 @@ module Risc
     def position_listeners
       event_table[:position_changed]
     end
+
     #look for InstructionListener and return its code if found
     def get_code
       listener = event_table.find{|one| one.class == InstructionListener}
@@ -55,6 +56,14 @@ module Risc
       listener.code
     end
 
+    def set(int)
+      same = int == self.at
+      Position.set_to(self , int)
+      @at = int
+      trigger(:position_changed , self ) unless same
+      int
+    end
+
     def +(offset)
       offset = offset.at if offset.is_a?(Position)
       @at + offset
@@ -122,6 +131,6 @@ module Risc
     end
   end
 end
-require_relative "object_listener"
+require_relative "position_listener"
 require_relative "instruction_listener"
 require_relative "code_listener"