unite the two resolve_to_index functions

test/mom/send/test_setup_simple.rb

@@ -0,0 +1,39 @@
+require_relative "../helper"
+
+module Risc
+  class TestMessageSetupSimple < MiniTest::Test
+    include Statements
+    include Assertions
+
+    def setup
+      super
+      @input = "5.mod4"
+      @expect = [LoadConstant, LoadConstant, SlotToReg, SlotToReg, LoadConstant,
+                 SlotToReg, RegToSlot, LoadConstant, SlotToReg, RegToSlot,
+                 SlotToReg, LoadConstant, FunctionCall, Label]
+      @produced = produce_body
+    end
+
+    def test_send_instructions
+      assert_nil msg = check_nil , msg
+    end
+    def test_load_method
+      method = @produced
+      assert_load( method, Parfait::TypedMethod ,:r1)
+      assert_equal :mod4 , method.constant.name
+    end
+    def test_load_space
+      space = @produced.next(1)
+      assert_load( space , Parfait::Space , :r3 )
+    end
+    def test_load_message
+      sl = @produced.next( 2 )
+      assert_slot_to_reg( sl , :r3 ,  4 ,  :r2 )
+    end
+    def test_load_next_message
+      sl = @produced.next( 3 )
+      assert_slot_to_reg( sl , :r2 ,  2 ,  :r4 )
+    end
+
+  end
+end