public async Task TestLayeredNoCacheObjectAsync()
{
var level1Cache = new NoCache();
var level2Cache = new NoCache();
var cache = new LayeredCache("lc", level1Cache, level2Cache);
int hits = 0;
Func <Task <string> > getter = async() =>
{
await Task.Delay(10);
hits++;
return(hits.ToString());
};
string result;
result = await cache.GetAsync("key", getter);
Assert.AreEqual(1, hits);
Assert.AreEqual("1", result);
result = await cache.GetAsync("key", getter);
Assert.AreEqual(2, hits);
Assert.AreEqual("2", result);
}
public async Task TestLayeredCacheValidInnerCachesAsync()
{
var l1 = new Mocks.MockMemCache("l1");
var l2 = new Mocks.MockMemCache("l2");
var cache = new LayeredCache("cache0", l1, l2);
int hits = 0;
Func <Task <int> > getter = async() => { hits++; return(hits); };
int result;
result = await cache.GetAsync("key", getter);
Assert.AreEqual(1, hits);
Assert.AreEqual(1, result);
Assert.AreEqual(2, l1.Misses);
Assert.AreEqual(2, l2.Misses);
Assert.AreEqual(0, l1.Hits);
Assert.AreEqual(0, l2.Hits);
result = await cache.GetAsync("key", getter);
Assert.AreEqual(1, hits);
Assert.AreEqual(1, result);
Assert.AreEqual(2, l1.Misses);
Assert.AreEqual(2, l2.Misses);
Assert.AreEqual(1, l1.Hits);
Assert.AreEqual(0, l2.Hits);
l1.ClearAll(false);
result = await cache.GetAsync("key", getter);
Assert.AreEqual(1, hits);
Assert.AreEqual(1, result);
Assert.AreEqual(4, l1.Misses);
Assert.AreEqual(2, l2.Misses);
Assert.AreEqual(1, l1.Hits);
Assert.AreEqual(1, l2.Hits);
result = await cache.GetAsync("key", getter);
Assert.AreEqual(1, hits);
Assert.AreEqual(1, result);
Assert.AreEqual(4, l1.Misses);
Assert.AreEqual(2, l2.Misses);
Assert.AreEqual(2, l1.Hits);
Assert.AreEqual(1, l2.Hits);
l2.ClearAll(false);
result = await cache.GetAsync("key", getter);
Assert.AreEqual(1, hits);
Assert.AreEqual(1, result);
Assert.AreEqual(4, l1.Misses);
Assert.AreEqual(2, l2.Misses);
Assert.AreEqual(3, l1.Hits);
Assert.AreEqual(1, l2.Hits);
result = await cache.GetAsync("key", getter);
Assert.AreEqual(1, hits);
Assert.AreEqual(1, result);
Assert.AreEqual(4, l1.Misses);
Assert.AreEqual(2, l2.Misses);
Assert.AreEqual(4, l1.Hits);
Assert.AreEqual(1, l2.Hits);
l2.ClearAll(false);
l1.ClearAll(false);
result = await cache.GetAsync("key", getter);
Assert.AreEqual(2, hits);
Assert.AreEqual(2, result);
Assert.AreEqual(6, l1.Misses);
Assert.AreEqual(4, l2.Misses);
Assert.AreEqual(4, l1.Hits);
Assert.AreEqual(1, l2.Hits);
result = await cache.GetAsync("key", getter);
Assert.AreEqual(2, hits);
Assert.AreEqual(2, result);
Assert.AreEqual(6, l1.Misses);
Assert.AreEqual(4, l2.Misses);
Assert.AreEqual(5, l1.Hits);
Assert.AreEqual(1, l2.Hits);
// Clears counters too
cache.ClearAll();
result = await cache.GetAsync("key", getter);
Assert.AreEqual(3, hits);
Assert.AreEqual(3, result);
Assert.AreEqual(2, l1.Misses);
Assert.AreEqual(2, l2.Misses);
Assert.AreEqual(0, l1.Hits);
Assert.AreEqual(0, l2.Hits);
result = await cache.GetAsync("key", getter);
Assert.AreEqual(3, hits);
Assert.AreEqual(3, result);
Assert.AreEqual(2, l1.Misses);
Assert.AreEqual(2, l2.Misses);
Assert.AreEqual(1, l1.Hits);
Assert.AreEqual(0, l2.Hits);
}