start a new ruby layer to do the to_vool conversion

the "normalization" is getting more and more complicated and is not tested
And it seems i really don't like working with the untyped ast

test/ruby/test_basic_values.rb

@@ -0,0 +1,80 @@
+require_relative "helper"
+
+module Ruby
+  class TestBasicValuesX < MiniTest::Test
+    include RubyTests
+
+    def test_self
+      lst = compile( "self")
+      assert_equal SelfExpression , lst.class
+    end
+    def test_nil
+      lst = compile( "nil")
+      assert_equal NilConstant , lst.class
+    end
+    def test_false
+      lst = compile( "false")
+      assert_equal FalseConstant , lst.class
+    end
+    def test_true
+      lst = compile( "true")
+      assert_equal TrueConstant , lst.class
+    end
+    def test_integer
+      lst = compile( "123")
+      assert_equal IntegerConstant , lst.class
+    end
+    def test_string
+      lst = compile( "'string'")
+      assert_equal StringConstant , lst.class , lst.inspect
+    end
+    def test_sym
+      lst = compile( ":symbol")
+      assert_equal SymbolConstant , lst.class , lst.inspect
+    end
+    def test_dstr
+      assert_raises RuntimeError do
+        compile( '"dstr#{self}"')
+      end
+    end
+
+    def test_scope
+      lst = compile( "begin ; 1 ; end")
+      assert_equal ScopeStatement , lst.class , lst.inspect
+    end
+    def test_scope_contents
+      lst = compile( "begin ; 1 ; end")
+      assert_equal 1 , lst.statements.first.value
+    end
+  end
+  class TestBasicTypesX < MiniTest::Test
+    include RubyTests
+
+    def setup
+      Parfait.boot!
+    end
+    def compile_ct( input )
+      lst = compile( input )
+      lst.ct_type
+    end
+    def test_integer
+      assert_equal "Integer_Type" , compile_ct( "123").name
+    end
+    def test_string
+      assert_equal "Word_Type" , compile_ct( "'string'").name
+    end
+    def test_sym
+      assert_equal "Word_Type" , compile_ct( ":symbol").name
+    end
+    # classes fot these are not implemented in parfait yet
+    def pest_nil
+      assert_equal "Nil_Type" , compile_ct( "nil").name
+    end
+    def pest_false
+      assert_equal "False_Type" , compile_ct( "false").name
+    end
+    def pest_true
+      assert_equal "True_Type" , compile_ct( "true").name
+    end
+  end
+end