void InstancesTest::test_arrange_selection_indices(void) 
{
   message += "test_arrange_selection_indices\n";

   Instances i;

   Vector<size_t> selection_indices;

   selection_indices = i.arrange_selection_indices();

   assert_true(selection_indices.size() == 0, LOG);
   
   i.set(1);

   selection_indices = i.arrange_selection_indices();

   assert_true(selection_indices.size() == 0, LOG);
}