public boolean containsValue(final long value) {
        final long[] entries = this.entries;
        for (int i = 1; i < entries.length; i += 2) {
            final long entryValue = entries[i];
            if (entryValue == value) {
                return true;
            }
        }
        return false;
    }
@Test
    public void shouldNotContainValueForAMissingEntry() {
        assertFalse(map.containsValue(1L));
    }