public void ShouldUpdateLRUWhenGetValue()
{
var cacheSize = 3;
var cache = new FoneDynamicsCache(cacheSize);
var key1 = "1";
var value1 = "cumbia1";
var key2 = "2";
var value2 = "cumbia2";
var key4 = "4";
var value4 = "cumbia4";
cache.AddOrUpdate(key1, value1);
cache.AddOrUpdate("2", "cumbia2");
cache.AddOrUpdate("3", "cumbia3");
object resultValue = "";
cache.TryGetValue("1", out resultValue); //here it has to update key 1, so "2" should be the new LFU
cache.AddOrUpdate(key4, value4);
cache.TryGetValue(key1, out resultValue);
//check that "1" is still present in cache
Assert.AreEqual(value1, resultValue, "LRU was not updated correctly and key1 was deleted.");
//check that "2" is no longer in cache
object resultValueTwo = "";
cache.TryGetValue(key2, out resultValueTwo);
Assert.AreNotEqual(value2, resultValueTwo, "key2 was not deleted and it is equal to value2");
Assert.AreEqual(null, resultValueTwo, "key2 was not deleted and is not null");
CacheTestsHelper.AssertCacheLimit(cacheSize, cache);
}
public void ShouldReturnNullWhenTryingToGetFromEmptyCache()
{
var cacheSize = 3;
var cache = new FoneDynamicsCache(cacheSize);
object foo = new List <string>();
cache.TryGetValue("foo", out foo);
Assert.AreEqual(null, foo, "foo value is not null");
CacheTestsHelper.AssertCacheLimit(cacheSize, cache);
}
public void ShouldBePreparedFBombardment()
{
var cacheSize = 1000;
var cache = new FoneDynamicsCache(cacheSize);
Task[] tasks = new Task[4];
tasks[0] = new Task(() =>
Parallel.For(0, 5000, i =>
{
cache.AddOrUpdate(i.ToString(), i);
})
);
tasks[1] = new Task(() =>
Parallel.For(0, 5000, i =>
{
object foo = i;
cache.TryGetValue(i.ToString(), out foo);
})
);
tasks[2] = new Task(() =>
Parallel.For(0, 5000, i =>
{
cache.AddOrUpdate(i.ToString(), i);
})
);
tasks[3] = new Task(() =>
Parallel.For(0, 5000, i =>
{
object foo = i;
cache.TryGetValue(i.ToString(), out foo);
})
);
for (int i = 0; i < 4; i++)
{
tasks[i].Start();
}
Task.WaitAll(tasks);
//no error
Assert.AreEqual(true, true);
}
public void ShouldAdd4KeysGet1KeyAndRemoveLRU()
{
var cacheSize = 3;
var cache = new FoneDynamicsCache(cacheSize);
var keyToTest = "2";
var valueToTest = "cumbia2";
cache.AddOrUpdate("1", "cumbia1");
cache.AddOrUpdate(keyToTest, valueToTest);
cache.AddOrUpdate("3", "cumbia3");
cache.AddOrUpdate("4", "cumbia4");
object resultValue = "";
if (cache.TryGetValue(keyToTest, out resultValue))
{
Assert.AreEqual(valueToTest, resultValue);
}
CacheTestsHelper.AssertCacheLimit(cacheSize, cache);
}
public void ShouldNotAllowCacheSizeLessThan1()
{
var cacheSize = -5;
var cache = new FoneDynamicsCache(cacheSize);
}
/// <summary>
/// //check cache limit
/// </summary>
/// <param name="cacheSize"></param>
/// <param name="cache"></param>
public static void AssertCacheLimit(int cacheSize, FoneDynamicsCache cache)
{
cache.SpaceUsed.Should().BeLessOrEqualTo(cacheSize, "because cache exceeded limit");
}
