start testing builtin seperately

in terms of output only

test/risc/builtin/helper.rb

@@ -0,0 +1,13 @@
+require_relative "../helper"
+
+module Risc
+  module Builtin
+    class BuiltinTest < MiniTest::Test
+      include Ticker
+      def setup
+        @string_input = as_main(main)
+        super
+      end
+    end
+  end
+end

test/risc/builtin/test_plus.rb

@@ -0,0 +1,19 @@
+require_relative "helper"
+
+module Risc
+  module Builtin
+    class PlusTest < BuiltinTest
+
+      def main
+        "return 5 + 5"
+      end
+      def test_add
+        #show_main_ticks # get output of what is
+        run_all
+        assert_equal Parfait::Integer , get_return.class
+        assert_equal 10 , get_return.value
+      end
+
+    end
+  end
+end