public void TimedLRUCache_Basic()
{
TimedLRUCache <string, string> cache;
string value;
cache = new TimedLRUCache <string, string>(StringComparer.OrdinalIgnoreCase);
Assert.AreEqual(0, cache.Count);
cache.Add("foo", "bar");
Assert.AreEqual(1, cache.Count);
Assert.AreEqual("bar", cache["foo"]);
try
{
value = cache["xxx"];
Assert.Fail("Expected a KeyNotFoundException");
}
catch (Exception e)
{
Assert.AreEqual(typeof(KeyNotFoundException).Name, e.GetType().Name);
}
cache["foo"] = "foobar";
Assert.AreEqual("foobar", cache["foo"]);
cache["bar"] = "boobar";
Assert.AreEqual("boobar", cache["bar"]);
Assert.AreEqual("foobar", cache["foo"]);
Assert.IsTrue(cache.TryGetValue("foo", out value));
Assert.AreEqual("foobar", value);
Assert.IsTrue(cache.TryGetValue("bar", out value));
Assert.AreEqual("boobar", value);
Assert.IsFalse(cache.TryGetValue("xxx", out value));
Assert.IsTrue(cache.ContainsKey("foo"));
Assert.IsTrue(cache.ContainsKey("bar"));
Assert.IsFalse(cache.ContainsKey("xxx"));
cache.Remove("foo");
Assert.IsFalse(cache.ContainsKey("foo"));
cache.Remove("bar");
Assert.IsFalse(cache.ContainsKey("bar"));
cache.Remove("xxx");
Assert.IsFalse(cache.ContainsKey("xxx"));
cache["foo"] = "foobar";
cache["bar"] = "boobar";
Assert.AreEqual(2, cache.Count);
Assert.IsTrue(cache.ContainsKey("foo"));
Assert.IsTrue(cache.ContainsKey("bar"));
cache.Clear();
Assert.AreEqual(0, cache.Count);
Assert.IsFalse(cache.ContainsKey("foo"));
Assert.IsFalse(cache.ContainsKey("bar"));
}
//---------------------------------------------------------------------
// Message handlers
/// <summary>
/// Removes entries from the cache whose key begin with the pattern
/// passed. This is highly dependent on the fact that cache keys
/// are formatted as REALM\tACCOUNT\tPASSWORD.
/// </summary>
/// <param name="pattern">The key pattern.</param>
private void CacheRemove(string pattern)
{
var delKeys = new List <string>();
pattern = pattern.ToUpper();
foreach (string key in cache.Keys)
{
if (key.StartsWith(pattern))
{
delKeys.Add(key);
}
}
for (int i = 0; i < delKeys.Count; i++)
{
cache.Remove(delKeys[i]);
}
}
public void TimedLRUCache_AutoDispose()
{
TimedLRUCache <int, TestItem> cache;
DisposableItem dItem0 = new DisposableItem(0);
DisposableItem dItem1 = new DisposableItem(1);
DisposableItem dItem2 = new DisposableItem(2);
TestItem item0 = new TestItem(0);
TestItem item1 = new TestItem(1);
TestItem item2 = new TestItem(2);
cache = new TimedLRUCache <int, TestItem>();
cache.AutoDispose = true;
cache.DefaultTTL = TimeSpan.FromMilliseconds(200);
// Verify that disposable items are disposed when they
// are implicitly removed from the cache when the maximum
// number of items allowed has been exceeded.
cache.MaxItems = 2;
cache.Add(0, dItem0);
cache.Add(1, dItem1);
cache.Add(2, dItem2);
Assert.AreEqual(2, cache.Count);
Assert.IsTrue(dItem0.IsDisposed);
Assert.IsFalse(dItem1.IsDisposed);
Assert.IsFalse(dItem2.IsDisposed);
// Verify that disposable items are disposed when the
// cache is cleared.
cache.Clear();
Assert.IsTrue(dItem1.IsDisposed);
Assert.IsTrue(dItem2.IsDisposed);
// Verify that disposable items are disposed when they
// are explicitly removed.
dItem0.IsDisposed = false;
cache.Add(0, dItem0);
cache.Remove(0);
Assert.IsTrue(dItem0.IsDisposed);
// Verify that disposable items are disposed when they
// are replaced in the cache.
cache.Clear();
dItem0.IsDisposed = false;
dItem1.IsDisposed = false;
cache.Add(0, dItem0);
cache[0] = dItem1;
Assert.IsTrue(dItem0.IsDisposed);
// Verify that replacing the same disposable item instance
// doesn't dispose the object.
cache.Clear();
dItem0.IsDisposed = false;
cache.Add(0, dItem0);
cache[0] = dItem0;
Assert.IsFalse(dItem0.IsDisposed);
// Verify disposal after flushing.
cache.Clear();
dItem0.IsDisposed = false;
dItem1.IsDisposed = false;
dItem2.IsDisposed = false;
cache.Add(0, dItem0);
cache.Add(1, dItem1);
cache.Add(2, dItem2);
Thread.Sleep(250);
cache.Flush();
Assert.IsTrue(dItem0.IsDisposed);
Assert.IsTrue(dItem1.IsDisposed);
Assert.IsTrue(dItem2.IsDisposed);
cache.Clear();
dItem0.IsDisposed = false;
dItem1.IsDisposed = false;
dItem2.IsDisposed = false;
cache.Add(0, dItem0);
cache.Add(1, dItem1);
cache.Add(2, dItem2);
Thread.Sleep(250);
cache.FlushLRU();
Assert.IsTrue(dItem0.IsDisposed);
Assert.IsTrue(dItem1.IsDisposed);
Assert.IsTrue(dItem2.IsDisposed);
// Verify that non-disposable items don't cause trouble
// when AutoDispose=true
cache.Clear();
cache.Add(0, item0);
cache.Add(1, item1);
cache.Add(2, item2);
cache.Remove(1);
cache[1] = new TestItem(3);
cache[2] = cache[2];
cache.Clear();
cache.Add(0, item0);
cache.Add(1, item1);
cache.Add(2, item2);
Thread.Sleep(250);
cache.Flush();
cache.Add(0, item0);
cache.Add(1, item1);
cache.Add(2, item2);
Thread.Sleep(250);
cache.FlushLRU();
}
