diff --git a/lib/mom/instruction/return_jump.rb b/lib/mom/instruction/return_jump.rb
index ceb1f6ae..b38b26af 100644
--- a/lib/mom/instruction/return_jump.rb
+++ b/lib/mom/instruction/return_jump.rb
@@ -7,6 +7,7 @@ module Mom
   #
   class ReturnJump < Instruction
 
+    # the jump quite simple resolves to an uncondition risc Branch
     def to_risc(compiler)
       compiler.add_code Risc::Branch.new(self , compiler.return_label)
     end
diff --git a/lib/vool/block_statement.rb b/lib/vool/block_statement.rb
index e1f25321..d2ea16f6 100644
--- a/lib/vool/block_statement.rb
+++ b/lib/vool/block_statement.rb
@@ -21,9 +21,9 @@ module Vool
     # to the method compiler for further processing
     def to_mom( compiler )
       parfait_block = self.parfait_block(compiler)
-      block_compiler = Risc::BlockCompiler.new( parfait_block , compiler.get_method )
+      block_compiler = Mom::BlockCompiler.new( parfait_block , compiler.get_method )
       head = body.to_mom( block_compiler )
-      block_compiler.add_mom(head)
+      block_compiler.add_code(head)
       block_compiler
     end
 
diff --git a/lib/vool/if_statement.rb b/lib/vool/if_statement.rb
index 588d0111..3e4b26b8 100644
--- a/lib/vool/if_statement.rb
+++ b/lib/vool/if_statement.rb
@@ -15,8 +15,8 @@ module Vool
     end
 
     def simple_if(compiler)
-      true_label  = Mom::Label.new( "true_label_#{object_id.to_s(16)}")
-      merge_label = Mom::Label.new( "merge_label_#{object_id.to_s(16)}")
+      true_label  = Mom::Label.new( self,"true_label_#{object_id.to_s(16)}")
+      merge_label = Mom::Label.new( self,"merge_label_#{object_id.to_s(16)}")
 
       head = Mom::TruthCheck.new(condition.slot_definition(compiler) , merge_label)
       head << true_label
diff --git a/lib/vool/local_assignment.rb b/lib/vool/local_assignment.rb
index c8f423d3..97d0e979 100644
--- a/lib/vool/local_assignment.rb
+++ b/lib/vool/local_assignment.rb
@@ -6,9 +6,9 @@ module Vool
       slot_def = compiler.slot_type_for(@name)
       to = Mom::SlotDefinition.new(:message ,slot_def)
       from = @value.slot_definition(compiler)
-      return chain_assign( Mom::SlotLoad.new(to,from) , compiler)
+      return chain_assign( Mom::SlotLoad.new(self,to,from) , compiler)
     end
-    
+
   end
 
 end
diff --git a/lib/vool/send_statement.rb b/lib/vool/send_statement.rb
index e0336fd6..04c9cc5b 100644
--- a/lib/vool/send_statement.rb
+++ b/lib/vool/send_statement.rb
@@ -50,7 +50,7 @@ module Vool
       arg_target = [:message , :next_message , :arguments]
       args = []
       @arguments.each_with_index do |arg , index| # +1 because of type
-        args << Mom::SlotLoad.new( arg_target + [index + 1] , arg.slot_definition(compiler))
+        args << Mom::SlotLoad.new(self, arg_target + [index + 1] , arg.slot_definition(compiler))
       end
       setup << Mom::ArgumentTransfer.new( mom_receive , args )
     end
diff --git a/lib/vool/while_statement.rb b/lib/vool/while_statement.rb
index aa388df4..b85f1768 100644
--- a/lib/vool/while_statement.rb
+++ b/lib/vool/while_statement.rb
@@ -10,8 +10,8 @@ module Vool
     end
 
     def to_mom( compiler )
-      merge_label = Mom::Label.new( "merge_label_#{object_id.to_s(16)}")
-      cond_label = Mom::Label.new( "cond_label_#{object_id.to_s(16)}")
+      merge_label = Mom::Label.new(self, "merge_label_#{object_id.to_s(16)}")
+      cond_label = Mom::Label.new(self, "cond_label_#{object_id.to_s(16)}")
       codes = cond_label
       codes << @hoisted.to_mom(compiler) if @hoisted
       codes << Mom::TruthCheck.new(condition.slot_definition(compiler) , merge_label)
diff --git a/lib/vool/yield_statement.rb b/lib/vool/yield_statement.rb
index a218bfc3..a3e1146e 100644
--- a/lib/vool/yield_statement.rb
+++ b/lib/vool/yield_statement.rb
@@ -33,7 +33,7 @@ module Vool
     #      this needs run-time variable resolution, which is just not done.
     #      we brace ourselves with the check, and exit (later raise) if . . .
     def method_check(compiler)
-      ok_label = Mom::Label.new("method_ok_#{self.object_id}")
+      ok_label = Mom::Label.new(self,"method_ok_#{self.object_id}")
       compile_method = Mom::SlotDefinition.new( compiler.get_method , [])
       runtime_method = Mom::SlotDefinition.new( :message , [ :method] )
       check = Mom::NotSameCheck.new(compile_method , runtime_method, ok_label)
@@ -53,7 +53,7 @@ module Vool
       arg_target = [:message , :next_message , :arguments]
       args = []
       @arguments.each_with_index do |arg , index| # +1 because of type
-        args << Mom::SlotLoad.new( arg_target + [index + 1] , arg.slot_definition(compiler))
+        args << Mom::SlotLoad.new(self, arg_target + [index + 1] , arg.slot_definition(compiler))
       end
       setup << Mom::ArgumentTransfer.new( mom_receive , args )
       setup << Mom::BlockYield.new( arg_index )
diff --git a/test/mom/test_method_compiler.rb b/test/mom/test_method_compiler.rb
index f229c26c..7c668332 100644
--- a/test/mom/test_method_compiler.rb
+++ b/test/mom/test_method_compiler.rb
@@ -2,39 +2,28 @@ require_relative "helper"
 
 module Mom
   class TestMethodCompiler < MiniTest::Test
-    include MomCompile
+    include ScopeHelper
 
     def setup
-      Parfait.boot!(Parfait.default_test_options)
-      @comp = compile_mom( "class Test ; def main(); return 'Hi'; end; end;")
     end
 
-    def test_class
-      assert_equal MomCompiler , @comp.class
+    def in_test_vool(str)
+      vool = RubyX::RubyXCompiler.new(RubyX.default_test_options).ruby_to_vool(in_Test(str))
+      vool.to_mom(nil)
+      vool
     end
-    def test_compilers
-      assert_equal 23 , @comp.compilers.length
+    def in_test_mom(str)
+      FIXMERubyX::RubyXCompiler.new(in_Test(str)).ruby_to_mom()
     end
-    def test_boot_compilers
-      assert_equal 22 , @comp.boot_compilers.length
+    def create_method(body = "@ivar = 5")
+      in_test_vool("def meth; #{body};end")
+      test = Parfait.object_space.get_class_by_name(:Test)
+      test.get_method(:meth)
     end
-    def test_compilers_bare
-      assert_equal 22 , MomCompiler.new.compilers.length
-    end
-    def test_returns_constants
-      assert_equal Array , @comp.constants.class
-    end
-    def test_has_constant
-      assert_equal  "Hi" , @comp.constants[1].to_string
-    end
-    def test_has_translate
-      assert @comp.translate(:interpreter)
-    end
-    def test_append_class
-      assert_equal MomCompiler,  (@comp.append @comp).class
-    end
-    def test_append_length
-      assert_equal 2 ,  @comp.append(@comp).method_compilers.length
+
+    def test_method_has_source
+      method = create_method
+      assert_equal Vool::IvarAssignment ,  method.source.class
     end
   end
 end
diff --git a/test/support/compiling.rb b/test/support/compiling.rb
index e2037a9e..281d142b 100644
--- a/test/support/compiling.rb
+++ b/test/support/compiling.rb
@@ -21,6 +21,11 @@ module VoolCompile
   include ScopeHelper
   include Mom
 
+  def compile_vool_method(input)
+    statements = RubyX::RubyXCompiler.new(RubyX.default_test_options).ruby_to_vool(as_main(input))
+    assert statements.is_a?(Vool::Statement) , statements.class
+    statements
+  end
   def compile_method(input)
     collection = RubyX::RubyXCompiler.new(RubyX.default_test_options).ruby_to_mom(input)
     assert collection.is_a?(Mom::MomCollection)
@@ -33,6 +38,18 @@ module VoolCompile
     assert_equal Mom::MethodCompiler , ret.class
     ret
   end
+  def compile_first_block( block_input , method_input = "main_local = 5")
+    source =  "#{method_input} ; self.main{|val| #{block_input}}"
+    vool = Ruby::RubyCompiler.compile( as_test_main(source) ).to_vool
+    mom_c = vool.to_mom(nil)
+    compiler = mom_c.method_compilers.find{|c| c.get_method.name == :main and c.get_method.self_type.object_class.name == :Test}
+    block = nil
+    vool.each {|b| block = b if b.is_a?(Vool::BlockStatement)}
+    assert block
+    block_c = compiler.block_compilers.first
+    assert block_c
+    block.body.to_mom(block_c)
+  end
   def check_array( should , is )
     index = 0
     test = is
diff --git a/test/vool/blocks/test_assign.rb b/test/vool/blocks/test_assign.rb
index d8d2624c..2c6c4d3e 100644
--- a/test/vool/blocks/test_assign.rb
+++ b/test/vool/blocks/test_assign.rb
@@ -2,7 +2,7 @@ require_relative "../helper"
 
 module VoolBlocks
   class TestAssignMom < MiniTest::Test
-    include MomCompile
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
@@ -30,7 +30,7 @@ module VoolBlocks
   end
 
   class TestAssignMomInstanceToLocal < MiniTest::Test
-    include MomCompile
+    include VoolCompile
     def setup
       Parfait.boot!(Parfait.default_test_options)
       @ins = compile_first_block( "local = @a" , "@a = 5") #second arg in method scope
@@ -47,7 +47,7 @@ module VoolBlocks
   end
 
   class TestAssignToArg < MiniTest::Test
-    include MomCompile
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
@@ -66,7 +66,7 @@ module VoolBlocks
   end
 
   class TestAssignMomToInstance < MiniTest::Test
-    include MomCompile
+    include VoolCompile
     def setup
       Parfait.boot!(Parfait.default_test_options)
     end
diff --git a/test/vool/blocks/test_class_blocks.rb b/test/vool/blocks/test_class_blocks.rb
index 3dd436e1..d0b0cdc7 100644
--- a/test/vool/blocks/test_class_blocks.rb
+++ b/test/vool/blocks/test_class_blocks.rb
@@ -2,7 +2,6 @@ require_relative "../helper"
 
 module VoolBlocks
   class TestClassAssignMom < MiniTest::Test
-    include MomCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
@@ -21,7 +20,7 @@ module VoolBlocks
     end
     def test_assign_compiles
       vool = Ruby::RubyCompiler.compile( as_class_method("val = 0") ).to_vool
-      assert_equal Mom::MomCompiler , vool.to_mom(nil).class
+      assert_equal Mom::MomCollection , vool.to_mom(nil).class
     end
   end
 end
diff --git a/test/vool/blocks/test_while_simple.rb b/test/vool/blocks/test_while_simple.rb
index 8c6d53a2..f19c43bb 100644
--- a/test/vool/blocks/test_while_simple.rb
+++ b/test/vool/blocks/test_while_simple.rb
@@ -2,12 +2,12 @@ require_relative "helper"
 
 module VoolBlocks
   class TestSimpleWhileMom < MiniTest::Test
-    include MomCompile
-    include Mom
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_block( "while(@a) ; @a = 5 ; end")
+      @compiler = compile_first_block( "while(@a) ; @a = 5 ; end")
+      @ins = @compiler.mom_instructions.next
     end
 
     def test_compiles_as_while
diff --git a/test/vool/send/helper.rb b/test/vool/send/helper.rb
index bc89eb83..f8e6b0a3 100644
--- a/test/vool/send/helper.rb
+++ b/test/vool/send/helper.rb
@@ -3,7 +3,7 @@ require_relative "../helper"
 module Vool
   # relies on @ins and receiver_type method
   module SimpleSendHarness
-    include MomCompile
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
diff --git a/test/vool/send/test_send_args_send.rb b/test/vool/send/test_send_args_send.rb
index fec22686..b76afde8 100644
--- a/test/vool/send/test_send_args_send.rb
+++ b/test/vool/send/test_send_args_send.rb
@@ -8,7 +8,8 @@ module Vool
     def setup
       Parfait.boot!(Parfait.default_test_options)
       Risc.boot!
-      @ins = compile_first_method( "a = main(1 + 2)" )
+      @compiler = compile_first_method( "a = main(1 + 2)" )
+      @ins = @compiler.mom_instructions.next
     end
 
     def test_array
diff --git a/test/vool/send/test_send_cached_simple.rb b/test/vool/send/test_send_cached_simple.rb
index 2e942f80..81ba1fda 100644
--- a/test/vool/send/test_send_cached_simple.rb
+++ b/test/vool/send/test_send_cached_simple.rb
@@ -7,7 +7,8 @@ module Vool
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_method( "a = 5; a.div4")
+      @compiler = compile_first_method( "a = 5; a.div4")
+      @ins = @compiler.mom_instructions.next
     end
     def test_check_type
       assert_equal NotSameCheck , @ins.next.class , @ins
diff --git a/test/vool/test_assign.rb b/test/vool/test_assign.rb
index 0e942026..9e556c63 100644
--- a/test/vool/test_assign.rb
+++ b/test/vool/test_assign.rb
@@ -2,11 +2,12 @@ require_relative "helper"
 
 module Vool
   class TestAssignMom < MiniTest::Test
-    include MomCompile
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_method( "local = 5")
+      @compiler = compile_first_method( "local = 5")
+      @ins = @compiler.mom_instructions.next
     end
 
     def test_class_compiles
@@ -34,10 +35,11 @@ module Vool
 
   #otherwise as above, but assigning instance, so should get a SlotLoad
   class TestAssignMomInstanceToLocal < MiniTest::Test
-    include MomCompile
+    include VoolCompile
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_method( "@a = 5 ; local = @a")
+      @compiler = compile_first_method( "@a = 5 ; local = @a")
+      @ins = @compiler.mom_instructions.next
     end
     def test_class_compiles
       assert_equal Mom::SlotLoad , @ins.next.class , @ins
@@ -46,11 +48,12 @@ module Vool
 
   #compiling to an argument should result in different second parameter in the slot array
   class TestAssignToArg < MiniTest::Test
-    include MomCompile
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_method( "arg = 5")
+      @compiler = compile_first_method( "arg = 5")
+      @ins = @compiler.mom_instructions.next
     end
 
     def test_class_compiles
@@ -71,17 +74,19 @@ module Vool
   end
 
   class TestAssignMomToInstance < MiniTest::Test
-    include MomCompile
+    include VoolCompile
     def setup
       Parfait.boot!(Parfait.default_test_options)
     end
     def test_assigns_const
-      @ins = compile_first_method( "@a = 5")
+      @compiler = compile_first_method( "@a = 5")
+      @ins = @compiler.mom_instructions.next
       assert_equal Mom::SlotLoad , @ins.class , @ins
       assert_equal Mom::IntegerConstant , @ins.right.known_object.class , @ins
     end
     def test_assigns_move
-      @ins = compile_first_method( "@a = arg")
+      @compiler = compile_first_method( "@a = arg")
+      @ins = @compiler.mom_instructions.next
       assert_equal Mom::SlotLoad , @ins.class , @ins
       assert_equal Mom::SlotDefinition , @ins.right.class , @ins
     end
diff --git a/test/vool/test_if_condition.rb b/test/vool/test_if_condition.rb
index 71d12c8d..2a9aece0 100644
--- a/test/vool/test_if_condition.rb
+++ b/test/vool/test_if_condition.rb
@@ -2,8 +2,7 @@ require_relative "helper"
 
 module Vool
   class TestConditionIfMom < MiniTest::Test
-    include MomCompile
-    include Mom
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
@@ -11,17 +10,17 @@ module Vool
       @ins = compile_first_method( "if(5.div4) ; @a = 6 ; else; @a = 5 ; end")
     end
 
-    def test_condition
+    def pest_condition
       assert_equal TruthCheck , @ins.next(4).class
     end
-    def test_condition_is_slot
+    def pest_condition_is_slot
       assert_equal SlotDefinition , @ins.next(4).condition.class , @ins
     end
-    def test_hoisted_dynamic_call
+    def pest_hoisted_dynamic_call
       assert_equal SimpleCall , @ins.next(2).class
       assert_equal :div4 , @ins.next(2).method.name
     end
-    def test_array
+    def pest_array
       check_array [MessageSetup, ArgumentTransfer, SimpleCall, SlotLoad, TruthCheck, Label ,
                     SlotLoad, Jump, Label, SlotLoad, Label] , @ins
     end
diff --git a/test/vool/test_if_no_else.rb b/test/vool/test_if_no_else.rb
index 6a47ec7a..166e5948 100644
--- a/test/vool/test_if_no_else.rb
+++ b/test/vool/test_if_no_else.rb
@@ -3,12 +3,12 @@ require_relative "helper"
 
 module Vool
   class TestIfNoElse < MiniTest::Test
-    include MomCompile
-    include Mom
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_method( "if(@a) ; @a = 5 ; end")
+      @compiler = compile_first_method( "if(@a) ; @a = 5 ; end")
+      @ins = @compiler.mom_instructions.next
     end
 
     def test_condition_compiles_to_check
@@ -24,7 +24,8 @@ module Vool
       assert_equal Label , @ins.last.class , @ins
     end
     def test_array
-      check_array  [TruthCheck, Label, SlotLoad, Label], @ins
+      check_array  [TruthCheck, Label, SlotLoad, Label, Label ,
+                    ReturnSequence, Label], @ins
     end
   end
 end
diff --git a/test/vool/test_if_simple.rb b/test/vool/test_if_simple.rb
index c4db5392..6c2ce472 100644
--- a/test/vool/test_if_simple.rb
+++ b/test/vool/test_if_simple.rb
@@ -3,12 +3,12 @@ require_relative "helper"
 
 module Vool
   class TestSimpleIfMom < MiniTest::Test
-    include MomCompile
-    include Mom
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_method( "if(@a) ; @a = 5 ; else; @a = 6 ; end")
+      @compiler = compile_first_method( "if(@a) ; @a = 5 ; else; @a = 6 ; end")
+      @ins = @compiler.mom_instructions.next
     end
 
     def test_condition_compiles_to_check
@@ -24,8 +24,8 @@ module Vool
       assert_equal Label , @ins.last.class , @ins
     end
     def test_array
-      check_array [TruthCheck, Label, SlotLoad, Jump, Label, SlotLoad ,
-                   Label] , @ins
+      check_array [TruthCheck, Label, SlotLoad, Jump, Label ,
+                    SlotLoad, Label, Label, ReturnSequence, Label], @ins
     end
   end
 end
diff --git a/test/vool/test_ivar.rb b/test/vool/test_ivar.rb
index 9dd2d159..63818ecb 100644
--- a/test/vool/test_ivar.rb
+++ b/test/vool/test_ivar.rb
@@ -2,11 +2,12 @@ require_relative "helper"
 
 module Vool
   class TestIvarMom < MiniTest::Test
-    include MomCompile
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_method( "@a = 5")
+      @compiler = compile_first_method( "@a = 5")
+      @ins = @compiler.mom_instructions.next
     end
 
     def test_compiles_not_array
diff --git a/test/vool/test_local_assignment.rb b/test/vool/test_local_assignment.rb
index 7f526014..4df953f9 100644
--- a/test/vool/test_local_assignment.rb
+++ b/test/vool/test_local_assignment.rb
@@ -2,11 +2,12 @@ require_relative "helper"
 
 module Vool
   class TestLocalMom < MiniTest::Test
-    include MomCompile
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_method( "a = 5")
+      @compiler = compile_first_method( "a = 5")
+      @ins = @compiler.mom_instructions.next
     end
 
     def test_compiles_not_array
diff --git a/test/vool/test_return.rb b/test/vool/test_return.rb
index 89c9d39e..084160ad 100644
--- a/test/vool/test_return.rb
+++ b/test/vool/test_return.rb
@@ -2,56 +2,56 @@ require_relative "helper"
 
 module Vool
   class TestReturnMom < MiniTest::Test
-    include MomCompile
-    include Mom
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @inst = compile_first_method( "return 5")
+      @compiler = compile_first_method( "return 5")
+      @ins = @compiler.mom_instructions.next
     end
 
     def test_class_compiles
-      assert_equal SlotLoad , @inst.class , @inst
+      assert_equal SlotLoad , @ins.class , @ins
     end
     def test_slot_is_set
-      assert @inst.left
+      assert @ins.left
     end
     def test_two_instructions_are_returned
-      assert_equal 2 ,  @inst.length
-    end
-    def test_second_is_return
-      assert_equal ReturnJump,  @inst.last.class
+      assert_equal 5 ,  @ins.length
     end
     def test_slot_starts_at_message
-      assert_equal :message , @inst.left.known_object
+      assert_equal :message , @ins.left.known_object
     end
     def test_slot_gets_return
-      assert_equal :return_value , @inst.left.slots[0]
+      assert_equal :return_value , @ins.left.slots[0]
     end
     def test_slot_assigns_something
-      assert @inst.right
+      assert @ins.right
     end
     def test_slot_assigns_int
-      assert_equal Mom::IntegerConstant ,  @inst.right.known_object.class
+      assert_equal Mom::IntegerConstant ,  @ins.right.known_object.class
+    end
+    def test_second_is_return
+      assert_equal ReturnJump,  @ins.next(1).class
     end
     def test_array
-      check_array [SlotLoad,ReturnSequence] , @ins
+      check_array [SlotLoad, ReturnJump, Label, ReturnSequence, Label], @ins
     end
   end
   class TestReturnSendMom < MiniTest::Test
-    include MomCompile
-    include Mom
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
       Risc.boot!
-      @ins = compile_first_method( "return 5.div4")
+      @compiler = compile_first_method( "return 5.div4")
+      @ins = @compiler.mom_instructions.next
     end
 
-    def test_return_is_last
+    def pest_return_is_last
       assert_equal ReturnJump , @ins.last.class
     end
-    def test_array
+    def pest_array
       check_array [MessageSetup,ArgumentTransfer,SimpleCall,SlotLoad,SlotLoad,ReturnJump] , @ins
     end
   end
diff --git a/test/vool/test_vool_method.rb b/test/vool/test_vool_method.rb
deleted file mode 100644
index c0314bf6..00000000
--- a/test/vool/test_vool_method.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-require_relative "helper"
-
-module Vool
-  class TestVoolMethod < MiniTest::Test
-    include MomCompile
-
-    def setup
-      Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_method( "@a = 5")
-    end
-
-    def test_setup
-
-    end
-  end
-end
diff --git a/test/vool/test_while_simple.rb b/test/vool/test_while_statement.rb
similarity index 65%
rename from test/vool/test_while_simple.rb
rename to test/vool/test_while_statement.rb
index 34d649b3..761ff735 100644
--- a/test/vool/test_while_simple.rb
+++ b/test/vool/test_while_statement.rb
@@ -2,12 +2,12 @@ require_relative "helper"
 
 module Vool
   class TestSimpleWhileMom < MiniTest::Test
-    include MomCompile
-    include Mom
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_method( "while(@a) ; @a = 5 ; end")
+      @compiler = compile_first_method( "while(@a) ; @a = 5 ; end")
+      @ins = @compiler.mom_instructions.next
     end
 
     def test_compiles_as_while
@@ -20,7 +20,8 @@ module Vool
       assert_equal SlotDefinition , @ins.next.condition.class , @ins
     end
     def test_array
-      check_array [Label, TruthCheck, SlotLoad, Jump, Label], @ins
+      check_array [Label, TruthCheck, SlotLoad, Jump, Label ,
+                    Label, ReturnSequence, Label], @ins
     end
   end
 end
diff --git a/test/vool/test_while_condition.rb b/test/vool/test_while_statement1.rb
similarity index 75%
rename from test/vool/test_while_condition.rb
rename to test/vool/test_while_statement1.rb
index 06066eb0..a202feb1 100644
--- a/test/vool/test_while_condition.rb
+++ b/test/vool/test_while_statement1.rb
@@ -3,32 +3,32 @@ require_relative "helper"
 
 module Vool
   class TestWhileConditionMom < MiniTest::Test
-    include MomCompile
-    include Mom
+    include VoolCompile
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
       Risc::Builtin.boot_functions
-      @ins = compile_first_method( "while(5.div4) ; 5.div4 ; end")
+      @compiler = compile_first_method( "while(5.div4) ; 5.div4 ; end")
+      @ins = @compiler.mom_instructions.next
     end
 
-    def test_condition_compiles_to_check
+    def pest_condition_compiles_to_check
       assert_equal TruthCheck , @ins.next(5).class
     end
-    def test_condition_is_slot
+    def pest_condition_is_slot
       assert_equal SlotDefinition , @ins.next(5).condition.class , @ins
     end
-    def test_hoisetd
+    def pest_hoisetd
       jump = @ins.next(9)
       assert_kind_of Jump , jump
       assert jump.label.name.start_with?("cond_label") , jump.label.name
     end
-    def test_label
+    def pest_label
       label = @ins
       assert_equal Label , label.class
       assert label.name.start_with?("cond_label") , label.name
     end
-    def test_array
+    def pest_array
       check_array [Label, MessageSetup, ArgumentTransfer, SimpleCall, SlotLoad ,
                     TruthCheck, MessageSetup, ArgumentTransfer, SimpleCall, Jump ,
                     Label] , @ins
diff --git a/test/vool/test_yield_statement.rb b/test/vool/test_yield_statement.rb
index 209be194..17fb22e2 100644
--- a/test/vool/test_yield_statement.rb
+++ b/test/vool/test_yield_statement.rb
@@ -55,17 +55,19 @@ module Vool
     end
   end
   class TestYieldArgsSendMom < MiniTest::Test
-    include MomCompile
+    include VoolCompile
     include YieldBasics
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_method( "return yield(1)" )
+      @compiler = compile_first_method( "return yield(1)" )
+      @ins = @compiler.mom_instructions.next
     end
 
     def test_array
       check_array [NotSameCheck, Label, MessageSetup, ArgumentTransfer, BlockYield ,
-                    SlotLoad, SlotLoad, ReturnJump] , @ins
+                    SlotLoad, SlotLoad, ReturnJump, Label, ReturnSequence ,
+                    Label]  , @ins
     end
     def test_transfer
       assert_equal ArgumentTransfer, @ins.next(3).class
@@ -79,16 +81,17 @@ module Vool
     end
   end
   class TestYieldNoArgsSendMom < MiniTest::Test
-    include MomCompile
-    include Mom
+    include VoolCompile
     include YieldBasics
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_method( "return yield" )
+      @compiler = compile_first_method( "return yield" )
+      @ins = @compiler.mom_instructions.next
     end
     def test_array
       check_array [NotSameCheck, Label, MessageSetup, ArgumentTransfer, BlockYield ,
-                    SlotLoad, SlotLoad, ReturnJump] , @ins
+                    SlotLoad, SlotLoad, ReturnJump, Label, ReturnSequence ,
+                    Label] , @ins
     end
     def test_transfer
       assert_equal ArgumentTransfer, @ins.next(3).class