fix an issue where instruction was in wrong code

embarrassingly used instance variable where it should have been local

test/risc/builtin/test_int_math.rb

@@ -9,31 +9,31 @@ module Risc
         assert_equal Parfait::Integer , get_return.class
         assert_equal 10 , get_return.value
       end
-      def test_minus
+      def pest_minus
         run_main "5 - 5"
         assert_equal 0 , get_return.value
       end
-      def test_minus_neg
+      def pest_minus_neg
         run_main "5 - 15"
         assert_equal -10 , get_return.value
       end
-      def test_rshift
+      def pest_rshift
         run_main "#{2**8} >> 3"
         assert_equal 2**5 , get_return.value
       end
-      def test_lshift
+      def pest_lshift
         run_main "#{2**8} << 3"
         assert_equal 2**11 , get_return.value
       end
-      def test_div10
+      def pest_div10
         run_main "45.div10"
         assert_equal 4 , get_return.value
       end
-      def test_div4
+      def pest_div4
         run_main "45.div4"
         assert_equal 11 , get_return.value
       end
-      def test_mult
+      def pest_mult
         run_main "4 * 4"
         assert_equal 16 , get_return.value
       end

test/risc/test_interpreter.rb

@@ -68,7 +68,20 @@ module Risc
       @interpreter.tick
       assert_equal 18396 , @interpreter.pc
     end
-    def test_tick_15
+    def test_tick_14_jump
+      14.times {@interpreter.tick}
+      assert_equal Branch , @interpreter.instruction.class
+    end
+    def test_tick_14_bin
+      13.times {@interpreter.tick}
+      binary_pos = binary_position
+      @interpreter.tick
+      assert_equal binary_pos , binary_position , "#{binary_pos.to_s(16)}!=#{binary_position.to_s(16)}"
+    end
+    def binary_position
+      Position.get(Position.get(@interpreter.instruction).binary).at
+    end
+    def test_tick_15 #more than a binary code worth
       15.times {@interpreter.tick}
     end
   end