Assert.assertTrue(vit.hasPrevious());
Assert.assertEquals(5, vit.previous());
Assert.assertTrue(vit.hasPrevious());
Assert.assertEquals(4, vit.previous());
Assert.assertTrue(vit.hasPrevious());
Assert.assertEquals(3, vit.previous());
Assert.assertTrue(vit.hasPrevious());
Assert.assertEquals(0, vit.previous());
Assert.assertTrue(vit.hasPrevious());
Assert.assertEquals(-5, vit.previous());
Assert.assertFalse(vit.hasPrevious());