Assert.assertTrue(t1.compareIntAttribute(t1, 2, 3) < 0);
// check negative values
Assert.assertTrue(t1.compareIntAttribute(t1, 0, 4) > 0);
Assert.assertTrue(t1.compareIntAttribute(t1, 4, 0) < 0);
Assert.assertTrue(t1.compareIntAttribute(t1, 4, 5) > 0);
Assert.assertTrue(t1.compareIntAttribute(t1, 5, 4) < 0);
// check for non-existing attributes
boolean exceptionThrown = false;
try {