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

test/risc/test_risc_value.rb

@@ -1,6 +1,37 @@
 require_relative "../helper"
 
-module Risc
-  class TestRegisterValue < MiniTest::Test
+class FakeBuilder
+  attr_reader :built
+  def add_instruction(ins)
+    @built = ins
+  end
+end
+module Risc
+  class TestRegisterValue < MiniTest::Test
+
+    def setup
+      Risc.machine.boot
+      @r0 = RiscValue.new(:r0 , :Message)
+      @r1 = RiscValue.new(:r1 , :Space)
+    end
+
+    def test_r0
+      assert_equal :r0 , @r0.symbol
+    end
+
+    def test_load_space
+      move = @r0 << Parfait.object_space
+      assert_equal LoadConstant , move.class
+    end
+    def test_transfer
+      transfer = @r0 << @r1
+      assert_equal Transfer , transfer.class
+    end
+    def test_calls_builder
+      builder = FakeBuilder.new
+      @r0.builder = builder
+      @r0 << @r1
+      assert_equal Transfer , builder.built.class
+    end
   end
 end