Assert.assertTrue(t1.compareIntAttribute(t1, 0, 0) == 0);
Assert.assertTrue(t1.compareIntAttribute(t1, 1, 1) == 0);
Assert.assertTrue(t1.compareIntAttribute(t1, 2, 2) == 0);
Assert.assertTrue(t1.compareIntAttribute(t1, 3, 3) == 0);
Assert.assertTrue(t1.compareIntAttribute(t1, 4, 4) == 0);
Assert.assertTrue(t1.compareIntAttribute(t1, 5, 5) == 0);
// check unequal values
Assert.assertTrue(t1.compareIntAttribute(t1, 0, 1) < 0);
Assert.assertTrue(t1.compareIntAttribute(t1, 1, 0) > 0);
Assert.assertTrue(t1.compareIntAttribute(t1, 1, 2) < 0);