fixed tests because of inheritance changes

lib/virtual/type.rb

@@ -4,6 +4,20 @@ module Virtual
   # Integer and (Object) References are the main derived classes, but float will come and ...
   # The Mystery Type has unknown type and has only casting methods. So it must be cast to be useful.
   class Type
+    def == other
+      return false unless other.class == self.class 
+      attributes.each do |a|
+        left = send(a)
+        right = other.send(a)
+        return false unless left.class == right.class 
+        return false unless left == right
+      end
+      return true
+    end
+
+    def inspect
+      self.class.name + ".new(" + attributes.collect{|a| send(a).inspect }.join(",")+ ")"
+    end
   end
   
   class Integer < Type
@@ -19,7 +33,9 @@ module Virtual
       @clazz = clazz
     end
     attr_accessor :clazz
-
+    def attributes
+      [:clazz]
+    end
     def at_index block , left , right
       block.ldr( self , left , right )
       self