    @Test
    public void testCompareAndIncreaseOnly() {

        AtomicLong target = new AtomicLong(5);
        assertThat(MixAll.compareAndIncreaseOnly(target, 6)).isTrue();
        assertThat(target.get()).isEqualTo(6);

        assertThat(MixAll.compareAndIncreaseOnly(target, 4)).isFalse();
        assertThat(target.get()).isEqualTo(6);
    }