public void RetrievePreventsEvict()
{
_cache.Store("key1", 0, new byte[] { 0, 1, 2, 3, 4 }, DateTime.MaxValue);
_cache.Store("key2", 0, new byte[] { 0, 1, 2, 3, 4 }, DateTime.MaxValue);
_cache.Retrieve(new[] { "key1" });
_cache.Store("key3", 0, new byte[] { 0, 1, 2, 3, 4 }, DateTime.MaxValue);
var keys = _cache.Keys.ToArray();
Assert.AreEqual(2, keys.Length);
Assert.IsTrue(keys.Contains("key1"));
Assert.IsTrue(keys.Contains("key3"));
}