/// <summary>
/// Forces a removal of a project root element from the weak cache if it is present.
/// </summary>
/// <param name="projectRootElement">The project root element to remove.</param>
/// <remarks>
/// No exception is thrown if this project root element is in use by currently loaded projects
/// by this method. The calling method must know that this is a safe operation.
/// There may of course be strong references to the project root element from customer code.
/// The assumption is that when they instruct the project collection to unload it, which
/// leads to this being called, they are releasing their strong references too (or it doesn't matter)
/// </remarks>
internal override void DiscardAnyWeakReference(ProjectRootElement projectRootElement)
{
ErrorUtilities.VerifyThrowArgumentNull(projectRootElement, "projectRootElement");
// A PRE may be unnamed if it was only used in memory.
if (projectRootElement.FullPath != null)
{
lock (_locker)
{
_weakCache.Remove(projectRootElement.FullPath);
}
}
}
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_non_existing_key_is_removed_Then_false_is_returned()
{
var dict = new WeakValueDictionary <int, Item> {
[0] = new Item(),
[1] = new Item()
};
bool removed = dict.Remove(3);
Assert.That(removed, Is.False);
Assert.That(dict.Count, Is.EqualTo(2));
}
public void When_key_is_removed_Then_count_is_decreased()
{
var dict = new WeakValueDictionary <int, Item> {
[0] = new Item(),
[1] = new Item()
};
bool removed = dict.Remove(0);
Assert.That(removed, Is.True);
Assert.That(dict.Count, Is.EqualTo(1));
}