public void Empty_cache_is_empty()
{
var cache = new InMemoryCache("fooCache");
(cache as ISynchronousCache).Name.ShouldBe("fooCache");
(cache as ISynchronousCache).TimeToLive.ShouldBeNull();
(cache as ISynchronousCache).TimeToIdle.ShouldBeNull();
cache.TotalSize.ShouldBe(0);
cache.AccessCount.ShouldBe(0);
cache.HitCount.ShouldBe(0);
cache.MissCount.ShouldBe(0);
cache.GetHitRatio().ShouldBe(0);
}
public void Cache_access_hit()
{
var cache = new InMemoryCache("fooCache");
var iface = cache as ISynchronousCache;
iface.Put("foo", DummyItem);
cache.TotalSize.ShouldBe(1);
iface.Get("foo").ShouldBe(DummyItem);
cache.AccessCount.ShouldBe(1);
cache.HitCount.ShouldBe(1);
cache.MissCount.ShouldBe(0);
cache.GetHitRatio().ShouldBe(1.0);
}
public void Cache_access_miss()
{
var cache = new InMemoryCache("fooCache");
var iface = cache as ISynchronousCache;
iface.Put("foo", DummyItem);
iface.Get("baz").ShouldBeNull();
cache.AccessCount.ShouldBe(1);
cache.HitCount.ShouldBe(0);
cache.MissCount.ShouldBe(1);
cache.GetHitRatio().ShouldBe(0.0);
}
public async Task Disposing_clears_cache()
{
var cache = new InMemoryCache("fooCache");
var iface = cache as IAsynchronousCache;
await iface.PutAsync("foo", DummyItem);
(await iface.GetAsync("foo")).ShouldBe(DummyItem);
iface.Dispose();
await Should.ThrowAsync<Exception>(async () =>
{
(await iface.GetAsync("foo")).ShouldBe(DummyItem);
});
cache = new InMemoryCache("fooCache");
iface = cache as IAsynchronousCache;
(await iface.GetAsync("foo")).ShouldBeNull();
}
public async Task Accessing_cache_from_multiple_threads()
{
var cache = new InMemoryCache("fooCache");
var iface = cache as IAsynchronousCache;
await iface.PutAsync("foo", DummyItem);
var tasks = from i in Enumerable.Range(0, 10)
select Task.Run(async () =>
{
await iface.PutAsync(i.ToString(), new Dictionary<string, object>() { [$"loop{i}"] = i });
(await iface.GetAsync(i.ToString())).ShouldContainKeyAndValue($"loop{i}", i);
(await iface.GetAsync("foo")).ShouldBe(DummyItem);
(await iface.GetAsync("baz")).ShouldBeNull();
});
await Task.WhenAll(tasks);
cache.TotalSize.ShouldBe(11);
cache.AccessCount.ShouldBe(30);
cache.HitCount.ShouldBe(20);
cache.MissCount.ShouldBe(10);
cache.GetHitRatio().ShouldBe(0.67, tolerance: 0.01);
}
public async Task Cache_access_after_TTL_but_not_TTI_expiration()
{
var cache = new InMemoryCache(
"fooCache",
timeToLive: TimeSpan.FromMilliseconds(3500),
timeToIdle: TimeSpan.FromMilliseconds(2000));
var iface = cache as IAsynchronousCache;
await iface.PutAsync("foo", DummyItem);
Thread.Sleep(1000);
(await iface.GetAsync("foo")).ShouldBe(DummyItem);
Thread.Sleep(1000);
(await iface.GetAsync("foo")).ShouldBe(DummyItem);
Thread.Sleep(1000);
(await iface.GetAsync("foo")).ShouldBe(DummyItem);
Thread.Sleep(1000);
(await iface.GetAsync("foo")).ShouldBeNull();
}
public async Task Removing_item()
{
var cache = new InMemoryCache("fooCache");
var iface = cache as IAsynchronousCache;
await iface.PutAsync("foo", DummyItem);
await iface.RemoveAsync("foo");
(await iface.GetAsync("bar")).ShouldBeNull();
cache.AccessCount.ShouldBe(2);
}
public async Task Multiple_cache_reads_and_writes_from_single_thread()
{
var cache = new InMemoryCache("fooCache");
var iface = cache as IAsynchronousCache;
await iface.PutAsync("foo", DummyItem);
for (var i = 0; i < 10; i++)
{
await iface.PutAsync(i.ToString(), new Dictionary<string, object>() { [$"loop{i}"] = i });
(await iface.GetAsync(i.ToString())).ShouldContainKeyAndValue($"loop{i}", i);
(await iface.GetAsync("foo")).ShouldBe(DummyItem);
(await iface.GetAsync("baz")).ShouldBeNull();
}
cache.TotalSize.ShouldBe(11);
cache.AccessCount.ShouldBe(30);
cache.HitCount.ShouldBe(20);
cache.MissCount.ShouldBe(10);
cache.GetHitRatio().ShouldBe(0.67, tolerance: 0.01);
}
public async Task Cache_access_miss()
{
var cache = new InMemoryCache("fooCache");
var iface = cache as IAsynchronousCache;
await iface.PutAsync("foo", DummyItem);
(await iface.GetAsync("baz")).ShouldBeNull();
cache.AccessCount.ShouldBe(1);
cache.HitCount.ShouldBe(0);
cache.MissCount.ShouldBe(1);
cache.GetHitRatio().ShouldBe(0.0);
}
public void Disposing_clears_cache()
{
var cache = new InMemoryCache("fooCache");
var iface = cache as ISynchronousCache;
iface.Put("foo", DummyItem);
iface.Get("foo").ShouldBe(DummyItem);
iface.Dispose();
Should.Throw<Exception>(() =>
{
iface.Get("foo").ShouldBe(DummyItem);
});
cache = new InMemoryCache("fooCache");
iface = cache as ISynchronousCache;
iface.Get("foo").ShouldBeNull();
}
public void Cache_access_after_TTI_expiration()
{
var cache = new InMemoryCache(
"fooCache",
timeToLive: null,
timeToIdle: TimeSpan.FromMilliseconds(2000));
var iface = cache as ISynchronousCache;
iface.Put("foo", DummyItem);
Thread.Sleep(1000);
iface.Get("foo").ShouldBe(DummyItem);
Thread.Sleep(1000);
iface.Get("foo").ShouldBe(DummyItem);
Thread.Sleep(2000);
iface.Get("foo").ShouldBeNull();
}
public void Accessing_cache_from_multiple_threads()
{
var cache = new InMemoryCache("fooCache");
var iface = cache as ISynchronousCache;
iface.Put("foo", DummyItem);
Parallel.For(0, 10, i =>
{
iface.Put(i.ToString(), new Dictionary<string, object>() { [$"loop{i}"] = i });
iface.Get(i.ToString()).ShouldContainKeyAndValue($"loop{i}", i);
iface.Get("foo").ShouldBe(DummyItem);
iface.Get("baz").ShouldBeNull();
});
cache.TotalSize.ShouldBe(11);
cache.AccessCount.ShouldBe(30);
cache.HitCount.ShouldBe(20);
cache.MissCount.ShouldBe(10);
cache.GetHitRatio().ShouldBe(0.67, tolerance: 0.01);
}
public void Removing_item()
{
var cache = new InMemoryCache("fooCache");
var iface = cache as ISynchronousCache;
iface.Put("foo", DummyItem);
iface.Remove("foo");
iface.Get("bar").ShouldBeNull();
cache.AccessCount.ShouldBe(2);
}
