@Test
public void testGetRangeSet() {

    JedisCluster mockJedisClient = mock(JedisCluster.class);
    CacheRedisClient mockedCachedRedisClient = mock(CacheRedisClient.class);
    when(mockedCachedRedisClient.getJedisClusterClient()).thenReturn(mockJedisClient);
    RedisCacheService redisCacheService = new RedisCacheService(config, mockedCachedRedisClient);
    Set<String> keys = new HashSet<>(Arrays.asList("key1", "key2"));
    redisCacheService.getRange(keys, 2, 10);
    verify(mockJedisClient, times(1)).lrange("key1", 2, 10);
    verify(mockJedisClient, times(1)).lrange("key2", 2, 10);
}