protected static void Unbounded_Trim1(IMemoizationCacheFactory mcf)
{
var res = mcf.Create <int, int>(x => x * 2, MemoizationOptions.None, EqualityComparer <int> .Default);
Assert.AreEqual(42, res.GetOrAdd(21));
Assert.AreEqual(1, res.Count);
var trim = res.AsTrimmableByArgumentAndResult();
Assert.IsNotNull(trim);
trim.Trim(kv => kv.Key % 2 == 0);
Assert.AreEqual(1, res.Count);
trim.Trim(kv => kv.Key % 3 == 0);
Assert.AreEqual(0, res.Count);
Assert.AreEqual(42, res.GetOrAdd(21));
Assert.AreEqual(1, res.Count);
trim.Trim(kv => kv.Value % 2 != 0);
Assert.AreEqual(1, res.Count);
trim.Trim(kv => kv.Value % 3 == 0);
Assert.AreEqual(0, res.Count);
}
protected static void Unbounded_Trim2(IMemoizationCacheFactory mcf)
{
var res = mcf.Create <int, int>(x => 100 / x, MemoizationOptions.CacheException, EqualityComparer <int> .Default);
Assert.ThrowsException <DivideByZeroException>(() => res.GetOrAdd(0));
Assert.AreEqual(1, res.Count);
Assert.AreEqual(50, res.GetOrAdd(2));
Assert.AreEqual(2, res.Count);
var trim = res.AsTrimmableByArgumentAndResult();
Assert.IsNotNull(trim);
trim.Trim(kv => kv.Key % 2 == 0);
Assert.AreEqual(1, res.Count);
var trimErr = res.AsTrimmableByArgumentAndResultOrError();
Assert.IsNotNull(trimErr);
trimErr.Trim(kv => kv.Value.Kind == ValueOrErrorKind.Error && kv.Key == 0);
Assert.AreEqual(0, res.Count);
trimErr.Trim(kv => kv.Key % 3 == 0);
Assert.AreEqual(0, res.Count);
Assert.ThrowsException <DivideByZeroException>(() => res.GetOrAdd(0));
Assert.AreEqual(1, res.Count);
Assert.AreEqual(50, res.GetOrAdd(2));
Assert.AreEqual(2, res.Count);
}
protected static void Unbounded_ErrorCaching(IMemoizationCacheFactory mcf)
{
var n = 0;
var cache = mcf.Create <string, int>(s => { n++; return(s.Length); }, MemoizationOptions.CacheException, comparer: null);
Assert.AreEqual(0, cache.Count);
Assert.AreEqual(0, n);
for (var i = 1; i <= 3; i++)
{
Assert.ThrowsException <NullReferenceException>(() => cache.GetOrAdd(argument: null));
Assert.AreEqual(1, cache.Count);
Assert.AreEqual(1, n);
}
}
protected static void Unbounded_Simple(IMemoizationCacheFactory mcf)
{
foreach (var options in new[] { MemoizationOptions.None, MemoizationOptions.CacheException })
{
var n = 0;
var cache = mcf.Create <string, int>(s => { n++; return(s.Length); }, options, comparer: null);
Assert.AreEqual(0, cache.Count);
Assert.AreEqual(0, n);
Assert.AreEqual(3, cache.GetOrAdd("foo"));
Assert.AreEqual(1, cache.Count);
Assert.AreEqual(1, n);
Assert.AreEqual(3, cache.GetOrAdd("foo"));
Assert.AreEqual(1, cache.Count);
Assert.AreEqual(1, n);
Assert.AreEqual(4, cache.GetOrAdd("test"));
Assert.AreEqual(2, cache.Count);
Assert.AreEqual(2, n);
cache.Clear();
Assert.AreEqual(0, cache.Count);
Assert.AreEqual(2, n);
Assert.AreEqual(3, cache.GetOrAdd("foo"));
Assert.AreEqual(1, cache.Count);
Assert.AreEqual(3, n);
Assert.AreEqual(3, cache.GetOrAdd("foo"));
Assert.AreEqual(1, cache.Count);
Assert.AreEqual(3, n);
Assert.AreEqual(4, cache.GetOrAdd("test"));
Assert.AreEqual(2, cache.Count);
Assert.AreEqual(4, n);
Assert.IsTrue(!string.IsNullOrEmpty(cache.DebugView));
}
}
protected static void Unbounded_ArgumentChecking(IMemoizationCacheFactory mcf)
{
Assert.ThrowsException <ArgumentNullException>(() => mcf.Create(default(Func <int, int>), MemoizationOptions.None, EqualityComparer <int> .Default));
}
