@Override public long size() {
        return hsa.size();
    }
@Test
    public void testSize() {
        assertEquals(0, map.size());

        int expected = 100;
        for (long i = 0; i < expected; i++) {
            long value = newValue();
            map.put(i, value);
        }

        assertEquals(map.toString(), expected, map.size());
    }