How to unit test Ehcache 3.x cache object using Java? Any CODE samples?

Question

How to unit test Ehcache 3.x cache object using Java? Any samples are good enough.

Java Class
import org.ehcache.*; 
import org.ehcache.builder.*; 
import org.ehcache.core.*;   
Public class CacheClass{

private static CacheManager cacheManager;

protected static EhCache<String, Long> getCache(String cacheName){
CacheManager cacheManager = CacheManagerBuilder.newCacheManagerBuilder().build; 
cacheManager.init(); 
return cacheManager.createCache("CacheName", CacheConfigurationBuilder.newCacheConfigurationBuilder(String.class, Long.class, ResourcePoolsBuilder.heap(100)); 
}