public void TestPutIfAbsent()
{
INamedCache cache = CacheFactory.GetCache(CacheName);
cache.Clear();
Hashtable ht = new Hashtable();
ht.Add("key4", 0);
ht.Add("key3", -10);
ht.Add("key2", 45);
ht.Add("key1", 398);
cache.InsertAll(ht);
object result = cache.InsertIfAbsent("key1", 400);
Assert.AreEqual(398, result);
result = cache.InsertIfAbsent("key5", 400);
Assert.AreEqual(null, result);
Assert.IsTrue(cache.Contains("key5"));
}