Steamline objectPosition init

check for resetting on the same position with different class, which
should not happen
Ie it’s ok for an object to push another object up,
but not for an instruction to land on code

test/risc/position/test_object_position.rb

@@ -6,22 +6,22 @@ module Risc
     class TestPositionBasic < MiniTest::Test
 
       def test_creation_ok
-        assert ObjectPosition.new(0,self)
+        assert ObjectPosition.new(self,0)
       end
       def test_creation_fail
         assert_raises {Position.new("0")}
       end
       def test_add
-        res = ObjectPosition.new(0,self) + 5
+        res = ObjectPosition.new(self,0) + 5
         assert_equal 5 , res
       end
       def test_sub
-        res = ObjectPosition.new(5,self) - 1
-        assert_equal 4 , res
+        res = ObjectPosition.new(self,0) - 1
+        assert_equal -1 , res
       end
       def test_sub_pos
-        res = ObjectPosition.new(5,self) - ObjectPosition.new(1,self)
-        assert_equal 4 , res
+        res = ObjectPosition.new(self,0) - ObjectPosition.new(self,0)
+        assert_equal 0 , res
       end
       def test_set
         pos = Position.set(self , 5)