progress on the builder front

mainly tests for now

test/risc/test_builder.rb

@@ -2,5 +2,23 @@ require_relative "../helper"
 
 module Risc
   class TestBuilder < MiniTest::Test
+
+    def setup
+      Risc.machine.boot
+      init = Parfait.object_space.get_init
+      compiler = Risc::MethodCompiler.new( init )
+      @builder = Builder.new(compiler)
+    end
+    def test_has_build
+      assert_nil @builder.build{ }
+    end
+    def test_has_build_and_returns_built
+      r1 = RiscValue.new(:r1 , :Space)
+      built = @builder.build{ space << r1 }
+      assert_equal Transfer , built.class
+    end
+    def test_has_attribute
+      assert_nil @builder.built
+    end
   end
 end