    @Test
    public void testAdd() {

        LowMemorySet<String> set = LowMemorySet.copyOf(ELEMENTS);
        assertFalse(set.contains("Techcable"));
        set.add("Techcable");
        assertTrue(set.contains("Techcable"));
        set.addAll(ImmutableList.of("Techcable", "PhanaticD", "Dragonslayer293", "Aikar"));
        assertTrue(set.contains("Techcable"));
        assertTrue(set.contains("PhanaticD"));
        assertTrue(set.contains("Aikar"));
        assertFalse(set.contains("md_5"));
    }