insertion pushes, split position tests

test/risc/position/test_position1.rb

@@ -0,0 +1,46 @@
+require_relative "helper"
+
+module Risc
+  class TestPositionEvents < MiniTest::Test
+    def setup
+      Position.clear_positions
+      @instruction = DummyInstruction.new
+      @position = Position.new(@instruction , 0)
+      @listener = PositionListener.new( @instruction )
+    end
+    def test_has_register
+      assert @position.position_listener( @instruction )
+    end
+    def test_can_unregister
+      listener = PositionListener.new(self)
+      assert @position.position_listener(listener)
+      assert @position.remove_position_listener(listener)
+    end
+    def test_fires
+      @object = @instruction
+      @position.register_event(:position_changed , self)#can't use helper
+      @position.trigger_changed
+      assert_equal @position , @trigger
+    end
+    def test_no_fire_after_unregister
+      @object = @instruction
+      Position.new(self, 10)
+      assert @position.register_event(:position_changed , self)#can't use helper
+      assert @position.remove_position_listener(self)
+      @position.trigger(:position_changed , @position)
+      assert_nil @trigger
+    end
+    def test_can_trigger_inserted
+      @object = @instruction
+      @position.register_event(:position_changed , self) #can't use helper
+      @position.trigger_inserted
+      assert_equal @position , @trigger
+    end
+    def position_changed(pos)
+      @trigger = pos
+    end
+    def position_inserted(pos)
+      @trigger = pos
+    end
+  end
+end