public void LruCacheStorage_ArgumentChecks()
{
var cacheStorage = new LruCacheStorage <string>(1);
AssertEx.ThrowsException <ArgumentOutOfRangeException>(() => new LruCacheStorage <string>(-1), ex => Assert.AreEqual("size", ex.ParamName));
AssertEx.ThrowsException <ArgumentNullException>(() => new LruCacheStorage <string>(1, comparer: null), ex => Assert.AreEqual("comparer", ex.ParamName));
AssertEx.ThrowsException <ArgumentNullException>(() => cacheStorage.GetEntry(value: null), ex => Assert.AreEqual("value", ex.ParamName));
AssertEx.ThrowsException <ArgumentNullException>(() => cacheStorage.ReleaseEntry(entry: null), ex => Assert.AreEqual("entry", ex.ParamName));
AssertEx.ThrowsException <ArgumentException>(() => cacheStorage.ReleaseEntry(new NullEntry()), ex => Assert.AreEqual("entry", ex.ParamName));
}
public void LruCacheStorage_Dispose()
{
var storage = new LruCacheStorage <int>(1);
var entry = storage.GetEntry(42);
storage.ReleaseEntry(entry);
storage.Dispose();
Assert.ThrowsException <ObjectDisposedException>(() => storage.GetEntry(42));
storage.Dispose();
}
public void LruCacheStorage_Count()
{
var cacheStorage = new LruCacheStorage <string>(1);
Assert.AreEqual(0, cacheStorage.Count);
var e1 = cacheStorage.GetEntry("foo");
var e2 = cacheStorage.GetEntry("bar");
Assert.AreEqual(1, cacheStorage.Count);
cacheStorage.ReleaseEntry(e1);
Assert.AreEqual(1, cacheStorage.Count);
cacheStorage.ReleaseEntry(e2);
Assert.AreEqual(0, cacheStorage.Count);
}
public void LruCacheStorage_ReleaseAfterEviction()
{
var storage = new LruCacheStorage <string>(1);
var e1 = storage.GetEntry("foo"); // "foo" is in cache
var e2 = storage.GetEntry("bar"); // "bar" is in cache; "foo" is evicted
var e3 = storage.GetEntry("foo"); // "foo" is in cache; "bar" is evicted
var e4 = storage.GetEntry("foo"); // "foo" cache hit
Assert.AreNotSame(e1, e3);
Assert.AreSame(e3, e4);
storage.ReleaseEntry(e1); // first "foo" is released, no-op (not in cache)
storage.ReleaseEntry(e2); // "bar" is released, no-op
storage.ReleaseEntry(e3); // "foo" is released, decremented
var e5 = storage.GetEntry("foo");
Assert.AreSame(e4, e5); // "foo" cache hit
storage.ReleaseEntry(e4);
storage.ReleaseEntry(e5);
}