@Test public void testAddRange() { final CountSet subject = new CountSet(10); subject.addRange(10,21); Assert.assertEquals(subject.size(),12); for (int i = 10; i < 22; i++) Assert.assertTrue(subject.contains(i)); for (int i = -1; i < 10; i++) Assert.assertFalse(subject.contains(i)); for (int i = 22; i < 31; i++) Assert.assertFalse(subject.contains(i)); }