public static void GetExpiredEntries_WhenCacheExhausted_ReturnsLeastFrequentlyUsedValue()
{
var policy = new LfuCachePolicy <string>();
var cacheEntry1 = new Mock <ICacheEntry <string> >();
cacheEntry1.Setup(k => k.AccessCount).Returns(1);
cacheEntry1.Setup(k => k.Size).Returns(5);
cacheEntry1.Setup(k => k.Key).Returns("test1");
var cacheEntry2 = new Mock <ICacheEntry <string> >();
cacheEntry2.Setup(k => k.AccessCount).Returns(5);
cacheEntry2.Setup(k => k.Size).Returns(5);
cacheEntry2.Setup(k => k.Key).Returns("test2");
var cacheEntry3 = new Mock <ICacheEntry <string> >();
cacheEntry3.Setup(k => k.AccessCount).Returns(3);
cacheEntry3.Setup(k => k.Size).Returns(5);
cacheEntry3.Setup(k => k.Key).Returns("test3");
var expired = policy.GetExpiredEntries(new[] { cacheEntry1.Object, cacheEntry2.Object, cacheEntry3.Object }, 12).ToList();
var expiredKey = expired.Single().Key;
Assert.AreEqual(cacheEntry1.Object.Key, expiredKey);
}
public static void GetExpiredEntries_WhenCacheExhausted_ReturnsNonEmptyCollection()
{
var policy = new LfuCachePolicy <string>();
var cacheEntry1 = new Mock <ICacheEntry <string> >();
cacheEntry1.Setup(k => k.AccessCount).Returns(1);
cacheEntry1.Setup(k => k.Size).Returns(5);
cacheEntry1.Setup(k => k.Key).Returns("test1");
var cacheEntry2 = new Mock <ICacheEntry <string> >();
cacheEntry2.Setup(k => k.AccessCount).Returns(2);
cacheEntry2.Setup(k => k.Size).Returns(5);
cacheEntry2.Setup(k => k.Key).Returns("test2");
var cacheEntry3 = new Mock <ICacheEntry <string> >();
cacheEntry3.Setup(k => k.AccessCount).Returns(3);
cacheEntry3.Setup(k => k.Size).Returns(5);
cacheEntry3.Setup(k => k.Key).Returns("test3");
var expired = policy.GetExpiredEntries(new[] { cacheEntry1.Object, cacheEntry2.Object, cacheEntry3.Object }, 12).ToList();
Assert.AreEqual(1, expired.Count);
}
public static void GetExpiredEntries_WhenOnlyValueExceedsSize_ReturnsValue()
{
var policy = new LfuCachePolicy <string>();
var cacheEntry = new Mock <ICacheEntry <string> >();
cacheEntry.Setup(k => k.AccessCount).Returns(1);
cacheEntry.Setup(k => k.Size).Returns(101);
cacheEntry.Setup(k => k.Key).Returns("test");
var expired = policy.GetExpiredEntries(new[] { cacheEntry.Object }, 100).ToList();
Assert.AreEqual(1, expired.Count);
}
public static void GetExpiredEntries_WhenCacheNotExhausted_ReturnsEmptySet()
{
var policy = new LfuCachePolicy <string>();
var cacheEntry = new Mock <ICacheEntry <string> >();
cacheEntry.Setup(k => k.AccessCount).Returns(1);
cacheEntry.Setup(k => k.Size).Returns(1);
cacheEntry.Setup(k => k.Key).Returns("test");
var expired = policy.GetExpiredEntries(new[] { cacheEntry.Object }, 100).ToList();
Assert.AreEqual(0, expired.Count);
}
public static void GetExpiredEntries_GivenZeroSize_ThrowsArgOutOfRangeException()
{
var policy = new LfuCachePolicy <string>();
Assert.Throws <ArgumentOutOfRangeException>(() => policy.GetExpiredEntries(Enumerable.Empty <ICacheEntry <string> >(), 0));
}
public static void GetExpiredEntries_GivenNullEntries_ThrowsArgNullException()
{
var policy = new LfuCachePolicy <string>();
Assert.Throws <ArgumentNullException>(() => policy.GetExpiredEntries(null, 1));
}
