public boolean containsAll(final IntHashSet coll)
    {
        for (final int value : coll.values)
        {
            if (MISSING_VALUE != value && !contains(value))
            {
                return false;
            }
        }

        return containsMissingValue || !coll.containsMissingValue;
    }
@Test
    void containsEmptySet()
    {
        final IntHashSet other = new IntHashSet(100);

        assertTrue(testSet.containsAll(other));
        assertTrue(testSet.containsAll((Collection<?>)other));
    }