public void GetAllTest()
{
String key1 = UniqueKey.NextKey();
String key2 = UniqueKey.NextKey();
cache.Clear();
Assert.IsNull(cache.Get(key1));
Assert.IsNull(cache.Get(key2));
cache.Put(key1, "carbon");
cache.Put(key2, "oxygen");
ISet <String> keySet = new HashSet <String>();
keySet.Add(key1);
keySet.Add(key2);
IDictionary <String, String> d = cache.GetAll(keySet);
Assert.AreEqual(d[key1], cache.Get(key1));
Assert.AreEqual(d[key2], cache.Get(key2));
Assert.AreEqual(d[key1], "carbon");
Assert.AreEqual(d[key2], "oxygen");
}