public void TestInMemoryCacheTimeToLive_FromInsert()
{
var ttl = 3;
int misses = 0;
string result;
var stopwatch = new Stopwatch();
Func <string> getter = () => { misses++; return(misses.ToString()); };
var cache = new InMemoryCache(
"insert-expire-cache",
new InMemoryPolicy
{
ExpirationFromAdd = TimeSpan.FromSeconds(ttl),
});
cache.ClearAll();
stopwatch.Start();
result = cache.Get("key", getter);
Assert.AreEqual(1, misses);
Assert.AreEqual("1", result);
result = cache.Get("key", getter);
Assert.AreEqual(1, misses);
Assert.AreEqual("1", result);
CacheTestTools.AssertValueDoesntChangeWithin(cache, "key", "1", getter, stopwatch, ttl);
// Should expire within TTL+60sec from insert
CacheTestTools.AssertValueDoesChangeWithin(cache, "key", "1", getter, stopwatch, 60.1);
result = cache.Get("key", getter);
Assert.AreNotEqual(1, misses);
Assert.AreNotEqual("1", result);
}
public void TestInMemoryCacheGetTwice()
{
var cache = new InMemoryCache("cache1", new InMemoryPolicy());
cache.ClearAll();
int misses = 0;
Func <string> getter = () => { misses++; return(misses.ToString()); };
string result;
result = cache.Get("key", getter);
Assert.AreEqual("1", result);
result = cache.Get("key", getter);
Assert.AreEqual("1", result);
}
public void TestInMemoryCacheTimeToLive_Constant()
{
var ttl = 3;
int misses = 0;
string result;
var stopwatch = new Stopwatch();
Func <string> getter = () => { misses++; return(misses.ToString()); };
var expireAt = DateTime.Now.AddSeconds(ttl);
stopwatch.Start();
var cache = new InMemoryCache(
"constant-expire",
new InMemoryPolicy
{
AbsoluteExpiration = expireAt,
});
cache.ClearAll();
result = cache.Get("key", getter);
DateTime insertTime = DateTime.Now;
Assert.AreEqual(1, misses);
Assert.AreEqual("1", result);
result = cache.Get("key", getter);
Assert.AreEqual(1, misses);
Assert.AreEqual("1", result);
CacheTestTools.AssertValueDoesntChangeWithin(cache, "key", "1", getter, stopwatch, ttl);
// Should expire within TTL+60sec from insert
CacheTestTools.AssertValueDoesChangeWithin(cache, "key", "1", getter, stopwatch, 60.1);
result = cache.Get("key", getter);
Assert.AreNotEqual(1, misses);
Assert.AreNotEqual("1", result);
}
public void TestInMemoryCacheSetTwice()
{
var cache = new InMemoryCache("cache1", new InMemoryPolicy());
cache.ClearAll();
int misses = 0;
Func <string> getter = () => { misses++; return(misses.ToString()); };
string result;
bool wasFound;
cache.Set("key", getter());
wasFound = cache.TryGet("key", out result);
Assert.AreEqual(true, wasFound);
Assert.AreEqual("1", result);
cache.Set("key", getter());
wasFound = cache.TryGet("key", out result);
Assert.AreEqual(true, wasFound);
Assert.AreEqual("2", result);
}