public void EnumerationCleaning()
{
var c = new WeakValueDictionary <int, object>();
object x = new object();
using (NoGCRegion.Enter(1000)) {
c.Add(0, x);
c.Add(1, x);
c.Add(2, x);
AddCollectableItems(c, 3, 3);
Assert.AreEqual(6, c.AddCountSinceLastClean);
Assert.AreEqual(6, c.UnsafeCount);
Assert.IsTrue(c.ContainsKey(1));
#if DEBUG || !NETFRAMEWORK // Causes entry with key 4 not to collection on NETFW release builds
Assert.IsTrue(c.ContainsKey(4));
#endif
}
Helpers.CollectAndWait();
Assert.IsTrue(c.ContainsKey(1));
Assert.IsFalse(c.ContainsKey(4));
foreach (object o in c)
{
}
Assert.IsTrue(c.Remove(0));
Assert.IsTrue(c.Remove(1));
Assert.IsFalse(c.Remove(4));
#if NETCOREAPP2_2 // NS2.0 target does not support removing stale entries as items are encountered.
Assert.AreEqual(6, c.AddCountSinceLastClean);
Assert.AreEqual(4, c.UnsafeCount);
#else
Assert.AreEqual(0, c.AddCountSinceLastClean);
Assert.AreEqual(1, c.UnsafeCount);
#endif
GC.KeepAlive(x);
}
public void When_item_is_added_Then_it_can_be_garbage_collected()
{
var dict = new WeakValueDictionary <int, Item> {
[1] = new Item()
};
GC.Collect();
GC.WaitForPendingFinalizers();
AssertEnumeration(dict, 1);
Assert.That(dict.ContainsKey(1), Is.False);
Assert.That(dict.Count, Is.EqualTo(0));
}