public void Constructor_Failures()
{
NWayMemoryCache<string, double> c;
try
{
c = new NWayMemoryCache<string, double>(0, 1000);
Assert.Fail("Should have thrown.");
}
catch (ArgumentOutOfRangeException e)
{
Assert.IsTrue(e.Message.ToLower().Contains("n is less than 1"));
}
try
{
c = new NWayMemoryCache<string, double>(1000, 0);
Assert.Fail("Should have thrown.");
}
catch (ArgumentOutOfRangeException e)
{
Assert.IsTrue(e.Message.ToLower().Contains("no values in the cache"));
}
try
{
c = new NWayMemoryCache<string, double>(2, 1);
Assert.Fail("Should have thrown.");
}
catch (ArgumentException e)
{
Assert.IsTrue(e.Message.ToLower().Contains("maximum of 1 value(s)"));
}
}
public void Constructor_Sanity()
{
//Interesting values.
var c = new NWayMemoryCache<string,double>(1, 1);
Assert.AreEqual(1, c.N);
Assert.AreEqual(1, c.MaxValues);
c = new NWayMemoryCache<string, double>(1, 2);
Assert.AreEqual(1, c.N);
Assert.AreEqual(2, c.MaxValues);
c = new NWayMemoryCache<string, double>(2, 7);
Assert.AreEqual(2, c.N);
Assert.AreEqual(8, c.MaxValues);
}
public void Extensibility()
{
//Use a cache entry generator which adds a new field, "Assigned" to CacheEntry.
var c = new NWayMemoryCache<string, double>(
2, 2,
cacheEntryGenerator: (keyId, val) => new CustomCacheEntry<double>(keyId, val)
);
//Set a custom replacement strategy where we boot out the newest "Assigned" record
//(as opposed to the default LRU record).
c.AssignReplacementStrategy(block => block
.ToList()
.ConvertAll(ce => (CustomCacheEntry<double>)ce)
.OrderByDescending(cce => cce.Assigned)
.First());
//Now check that it works.
c["01"] = 1.0;
Thread.Sleep(100);
Assert.IsTrue(c.ContainsKey("01"));
c["02"] = 2.0;
Thread.Sleep(100);
Assert.IsTrue(c.ContainsKey("01"));
Assert.IsTrue(c.ContainsKey("02"));
c["03"] = 3.0;
Thread.Sleep(100);
Assert.IsTrue(c.ContainsKey("01"));
Assert.IsTrue(!c.ContainsKey("02"));
Assert.IsTrue(c.ContainsKey("03"));
c["04"] = 4.0;
Thread.Sleep(100);
Assert.IsTrue(c.ContainsKey("01"));
Assert.IsTrue(!c.ContainsKey("02"));
Assert.IsTrue(!c.ContainsKey("03"));
Assert.IsTrue(c.ContainsKey("04"));
}
public void Sanity()
{
//Interesting values.
var c = new NWayMemoryCache<string, double>(2, 6);
//Fill up every slot in the cache
for (var i = 0; i < 6; i++)
{
var key = i.ToString() + "S";
var val = (double)i;
Assert.IsTrue(!c.ContainsKey(key));
c[key] = val;
Assert.IsTrue(c.ContainsKey(key));
Assert.AreEqual(val, c[key]);
}
//Default eviction algorithm will kick out key == "0S"
Assert.IsTrue(c.ContainsKey("0S"));
c["full"] = 24.0;
Assert.IsTrue(c.ContainsKey("full"));
Assert.AreEqual(24.0, c["full"]);
Assert.IsTrue(!c.ContainsKey("0S"));
//Remove(...)
c.Remove(null);
Assert.IsTrue(! c.ContainsKey(null));
//Clear(...)
Assert.IsTrue(c.ContainsKey("full"));
c.Clear();
Assert.IsTrue(! c.ContainsKey("full"));
}
