Refined solution

testdata/ruby/layMarkers.rb

@@ -77,6 +77,29 @@ class LAYMarkers_TestClass < TestBase
 
   end
 
+  # persistent markers
+  def test_2
+
+    if !RBA.constants.member?(:Application)
+      return
+    end
+
+    app = RBA::Application.instance
+    mw = app.main_window
+    mw.create_layout(0)
+    cv = mw.current_view
+
+    m = RBA::Marker.new
+    m.set(RBA::DBox.new(1, 2, 3, 4))
+    m.vertex_size = 3
+    cv.add_marker(m)
+
+    cv.clear_markers
+
+    assert_equal(m.destroyed?, true)
+
+  end
+
 end
 
 load("test_epilogue.rb")