public void WeakCacheDictionary_Simple()
{
var cd = new WeakCacheDictionary <string, string>();
var n = 0;
Assert.AreEqual("FOO", cd.GetOrAdd("foo", s => { n++; return(s.ToUpper()); }));
Assert.AreEqual(1, n);
Assert.AreEqual("FOO", cd.GetOrAdd("foo", s => { n++; return(s.ToUpper()); }));
Assert.AreEqual(1, n);
Assert.AreEqual("BAR", cd.GetOrAdd("bar", s => { n++; return(s.ToUpper()); }));
Assert.AreEqual(2, n);
Assert.IsTrue(cd.Remove("bar"));
Assert.AreEqual(2, n);
Assert.IsFalse(cd.Remove("qux"));
Assert.AreEqual(2, n);
Assert.AreEqual("BAR", cd.GetOrAdd("bar", s => { n++; return(s.ToUpper()); }));
Assert.AreEqual(3, n);
#if DEBUG
Assert.IsTrue(cd.Keys.OrderBy(x => x).SequenceEqual(new[] { "bar", "foo" }));
#endif
}
public void WeakCacheDictionary_Finalizers()
{
var cd = new WeakCacheDictionary <Obj, string>();
var initial = Obj.FinalizeCount;
for (var i = 1; i <= 10; i++)
{
Assert.IsTrue(GetOrAdd(cd).Contains("Obj"));
// NB: This has shown to be flaky on Mono.
if (Type.GetType("Mono.Runtime") == null)
{
GC.Collect();
GC.WaitForPendingFinalizers();
Assert.AreEqual(i, Obj.FinalizeCount - initial);
}
}
}
public void WeakCacheDictionary_Null()
{
var cd = new WeakCacheDictionary <string, string>();
var n = 0;
Assert.AreEqual("NULL", cd.GetOrAdd(key: null, s => { n++; return((s ?? "null").ToUpper()); }));
Assert.AreEqual(1, n);
Assert.AreEqual("NULL", cd.GetOrAdd(key: null, s => { n++; return((s ?? "null").ToUpper()); }));
Assert.AreEqual(1, n);
Assert.IsTrue(cd.Remove(key: null));
Assert.AreEqual(1, n);
Assert.AreEqual("NULL", cd.GetOrAdd(key: null, s => { n++; return((s ?? "null").ToUpper()); }));
Assert.AreEqual(2, n);
#if DEBUG
Assert.IsTrue(cd.Keys.Any(x => x == null));
#endif
}
