introduce some helper methods

test/arm/helper.rb

@@ -18,7 +18,7 @@ module Arm
       @machine = Arm::ArmMachine
       @binary = FakeBin.new
       Risc::Position.clear_positions
-      Risc::Position.set(@binary , 0)
+      Risc::Position.new(@binary , 0)
     end
 
     # code is what the generator spits out, at least one instruction worth (.first)

test/risc/position/test_object_listener.rb

@@ -11,15 +11,15 @@ module Risc
       @listener = PositionListener.new(@dependent)
     end
     def test_register
-      assert @pos.register_event(:position_changed , @listener)
+      assert @pos.position_listener(@listener)
     end
     def test_no_fire
-      @pos.register_event(:position_changed , self)
+      @pos.position_listener(self)
       Position.set_to(@pos,0)
       assert_equal 0 , Position.get(@object).at
     end
     def test_reset
-      @pos.register_event(:position_changed , @listener)
+      @pos.position_listener( @listener)
       Position.set_to(@pos,4)
       assert_equal 0 , Position.at(4).at
     end

test/risc/position/test_position.rb

@@ -15,9 +15,18 @@ module Risc
     def test_has_get_code
       assert_nil Position.new(self , -1).get_code
     end
-    def pest_creation_ok
-      assert Position.new(self,0)
+    def test_has_listeners_helper
+      assert_equal Array , Position.new(self,-1).position_listeners.class
     end
+    def test_listeners_empty
+      assert Position.new(self,-1).position_listeners.empty?
+    end
+    def test_has_listener_helper
+      pos = Position.new(self,-1)
+      pos.position_listener( self )
+      assert_equal 1 , pos.position_listeners.length
+    end
+
     def pest_creation_fail
       assert_raises {Position.new("0")}
     end
@@ -63,20 +72,22 @@ module Risc
       @position = Position.new(self)
     end
     def pest_has_register
-      assert @position.register_event(:position_changed , self)
+      assert @position.position_listener( self)
     end
     def pest_can_unregister
-      assert @position.register_event(:position_changed ,self)
-      assert @position.unregister_event(:position_changed ,self)
+      listener = PositionListener.new(self)
+      assert @position.position_listener(listener)
+      assert @position.unregister_event(:position_changed ,listener)
     end
     def pest_fires
-      @position.register_event(:position_changed ,self)
+      @position.position_listener(self)
       @position.trigger(:position_changed , @position)
       assert_equal @position , @trigger
     end
     def pest_no_fire_after_unregister
-      assert @position.register_event(:position_changed ,self)
-      assert @position.unregister_event(:position_changed ,self)
+      listener = PositionListener.new(self)
+      assert @position.position_listener( listener)
+      assert @position.unregister_event(:position_changed ,listener)
       @position.trigger(:position_changed , @position)
       assert_nil @trigger
     end

test/risc/test_machine.rb

@@ -31,7 +31,7 @@ module Risc
         count += 1
         addr = addr.next_integer
       end
-      assert_equal 5, count  
+      assert_equal 5, count
     end
   end
   class TestMachineInit < MiniTest::Test
@@ -48,10 +48,10 @@ module Risc
       assert_equal "0x5ed4" ,  Position.get(@machine.cpu_init.first).to_s
     end
     def test_cpu_bin
-      assert_equal "0x5ecc" ,  Position.get(Position.get(@machine.cpu_init.first).binary).to_s
+      assert_equal "0x5ecc" ,  Position.get(@machine.cpu_init).to_s
     end
     def test_cpu_label
-      assert_equal InstructionPosition ,  Position.get(@machine.cpu_init.first).class
+      assert_equal Position ,  Position.get(@machine.cpu_init.first).class
     end
     def test_first_binary_jump
       bin = Parfait.object_space.get_init.binary