Lots of preloading for tests

so many relied (implicitly( on some builtin function
after all can't do much in ruby without calling
Now all those dependencies are explicit
Small risc changes come because the macro version has a return label and unreachable label

test/risc/test_text_writer.rb

@@ -2,12 +2,10 @@ require_relative "../helper"
 
 module Risc
   class TestTextWriter < MiniTest::Test
-
+    include  ScopeHelper
     def setup
-      Parfait.boot!(Parfait.default_test_options)
-      Mom.boot!
-      Risc.boot!
-      @linker = Mom::MomCollection.new.to_risc.translate(:arm)
+      compiler = compiler_with_main()
+      @linker = compiler.to_target( :arm)
     end
     def test_init
       @text_writer = TextWriter.new(@linker)
@@ -18,12 +16,10 @@ module Risc
     end
   end
   class TestTextWriterPositions < MiniTest::Test
-
+    include  ScopeHelper
     def setup
-      Parfait.boot!(Parfait.default_test_options)
-      Mom.boot!
-      Risc.boot!
-      @linker = Mom::MomCollection.new.to_risc.translate(:arm)
+      compiler = compiler_with_main()
+      @linker = compiler.to_target( :arm)
       @linker.position_all
       @linker.create_binary
       @text_writer = TextWriter.new(@linker)