fix insertion and add assign send

must implement send conversion before this makes sense

test/mom/test_assign_local_const.rb

@@ -1,7 +1,7 @@
 require_relative 'helper'
 
 module Risc
-  class TestLocalAssign < MiniTest::Test
+  class TestAssignLocalConst < MiniTest::Test
     include Statements
 
     def setup

test/mom/test_assign_local_send.rb

@@ -0,0 +1,28 @@
+require_relative 'helper'
+
+module Risc
+  class TestAssignLocalSend < MiniTest::Test
+    include Statements
+
+    def setup
+      super
+      @input = "r = 5.mod4"
+      @expect = [Label, LoadConstant, RegToSlot, Label, Label, SlotToReg ,
+                 RegToSlot]
+    end
+    def test_local_assign_instructions
+      assert_nil msg = check_nil , msg
+    end
+
+    def ttest_constant_load
+      produced = produce_body
+      assert_equal 5 , produced.constant.known_object.value
+    end
+
+    def ttest_slot_move
+      produced = produce_body
+      assert_equal produced.next.register , produced.register
+    end
+
+  end
+end