public void TestHits()
{
SimpleCacheStatistics stats = new SimpleCacheStatistics();
int count = 0;
Assert.AreEqual(stats.CacheHits, count);
Assert.AreEqual(stats.CacheHitsMillis, 0);
Assert.AreEqual(stats.AverageHitMillis, 0);
Assert.AreEqual(stats.HitProbability, 0);
long start = DateTimeUtils.GetSafeTimeMillis();
Thread.Sleep(10); //so that CacheHitsMillis wouldn't be 0
stats.RegisterHit(start);
count++;
Assert.AreEqual(stats.CacheHits, count);
Assert.AreEqual(stats.AverageHitMillis, (double)stats.CacheHitsMillis);
stats.RegisterHit(0);
count++;
Assert.AreEqual(stats.CacheHits, count);
Assert.AreEqual(stats.AverageHitMillis, (double)stats.CacheHitsMillis / (double)count);
int n = 5;
start = DateTimeUtils.GetSafeTimeMillis();
Thread.Sleep(10);
stats.RegisterHits(n, start);
count += n;
Assert.AreEqual(stats.CacheHits, count);
Assert.AreEqual(stats.AverageHitMillis, (double)stats.CacheHitsMillis / (double)count);
Assert.AreEqual(stats.HitProbability, 1);
stats.ResetHitStatistics();
Assert.AreEqual(stats.CacheHits, 0);
Assert.AreEqual(stats.CacheHitsMillis, 0);
Assert.AreEqual(stats.AverageHitMillis, 0);
}
public void TestGets()
{
SimpleCacheStatistics stats = new SimpleCacheStatistics();
int countHits = 0;
int countMisses = 0;
Assert.AreEqual(stats.TotalGets, 0);
Assert.AreEqual(stats.TotalGetsMillis, 0);
Assert.AreEqual(stats.AverageGetMillis, 0);
Assert.AreEqual(stats.HitProbability, 0);
long start = DateTimeUtils.GetSafeTimeMillis();
Thread.Sleep(10); //so that TotalGetsMillis wouldn't be 0
stats.RegisterHit(start);
countHits++;
Assert.AreEqual(stats.TotalGets, countHits);
Assert.AreEqual(stats.AverageGetMillis, (double)stats.TotalGetsMillis);
Assert.AreEqual(stats.HitProbability, 1);
start = DateTimeUtils.GetSafeTimeMillis();
Thread.Sleep(10);
stats.RegisterMiss(start);
countMisses++;
Assert.AreEqual(stats.TotalGets, countHits + countMisses);
Assert.AreEqual(stats.AverageGetMillis, (double)stats.TotalGetsMillis / (double)(countHits + countMisses));
Assert.AreEqual(stats.HitProbability, 0.5);
int n = 5;
stats.RegisterHits(n, 0);
countHits += n;
Assert.AreEqual(stats.TotalGets, countHits + countMisses);
Assert.AreEqual(stats.AverageGetMillis, (double)stats.TotalGetsMillis / (double)(countHits + countMisses));
stats.ResetHitStatistics();
Assert.AreEqual(stats.TotalGets, 0);
Assert.AreEqual(stats.TotalGetsMillis, 0);
Assert.AreEqual(stats.AverageGetMillis, 0);
}
