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

   Instances i;

   // Test

   i.set();

   assert_true(i.count_training_instances_number() == 0, LOG);

   // Test

   i.set(1);

   assert_true(i.count_training_instances_number() == 1, LOG);

}