@Test
 public void shouldNotAddEqualThresholds() {
   assertEquals(0, notifier.getThresholdSize());
   SingleThreshold threshold1 = new SingleThreshold("load_one", SingleThreshold.MAX, 3);
   SingleThreshold threshold2 = new SingleThreshold("load_one", SingleThreshold.MAX, 3);
   notifier.addThreshold("default", threshold1);
   notifier.addThreshold("default", threshold2);
   assertEquals(1, notifier.getThresholdSize());
 }
 @Test
 public void shouldAddOneDoubleThreshold() {
   DoubleThreshold threshold = new DoubleThreshold("load_five", DoubleThreshold.BETWEEN, 1, 1.1);
   notifier.addThreshold("default", threshold);
   assertEquals(1, notifier.getThresholdSize());
 }
 @Test
 public void shouldAddOneSingleThreshold() {
   SingleThreshold threshold = new SingleThreshold("load_one", SingleThreshold.MAX, 3);
   notifier.addThreshold("default", threshold);
   assertEquals(1, notifier.getThresholdSize());
 }