public void SynchronisedHashSetTryRemoveRemoveEachUniqueItemOnlyOnceMultiThreaded()
{
var items = new List <string> {
"Frodo", "Sam", "Merry", "Pippin", "Gandalf", "Aragorn", "Gimli", "Legolas", "Boromir"
};
var itemsToRemove = new List <string> {
"Gandalf", "Aragorn", "Gimli", "Legolas", "Boromir"
};
int successfulRemoveCount = 0;
using (var set = new SynchronisedHashSet <string>(items))
{
var status = Parallel.For(0, 10000, i =>
{
if (set.TryRemove(itemsToRemove[i % 5]))
{
Interlocked.Increment(ref successfulRemoveCount);
}
});
while (!status.IsCompleted)
{
Thread.Sleep(5);
}
Assert.AreEqual(4, set.Count);
Assert.AreEqual(5, successfulRemoveCount);
}
}
public void SynchronisedHashSetTryRemoveRemoveEachUniqueItemOnlyOnce()
{
var items = new List <string> {
"Frodo", "Sam", "Merry", "Pippin", "Gandalf", "Aragorn", "Gimli", "Legolas", "Boromir"
};
var itemsToRemove = new List <string> {
"Gandalf", "Aragorn", "Gimli", "Legolas", "Boromir"
};
int successfulRemoveCount = 0;
using (var set = new SynchronisedHashSet <string>(items))
{
for (int i = 0; i < 10000; i++)
{
if (set.TryRemove(itemsToRemove[i % 5]))
{
successfulRemoveCount++;
}
}
Assert.AreEqual(4, set.Count);
Assert.AreEqual(5, successfulRemoveCount);
}
}
public void SynchronsiedHashSetTryRemoveDoesNotRemoveIfUnderlyingSetDoesNotContainItem()
{
var collection = new List <string> {
"Frodo", "Sam", "Merry", "Pippin"
};
using (var set = new SynchronisedHashSet <string>(collection))
{
set.TryRemove("Gandalf");
Assert.AreEqual(4, set.Count);
}
}
public void SynchronisedHashSetTryRemoveReturnsFalseIfUnderlyingSetDoesNotContainItem()
{
var items = new List <string> {
"Frodo", "Sam", "Merry", "Pippin"
};
using (var set = new SynchronisedHashSet <string>(items))
{
bool result = set.TryRemove("Gandalf");
Assert.IsFalse(result);
}
}
public void SynchronisedHashSetTryRemoveRemovesIfUnderlyingSetContainsItem()
{
var items = new List <string> {
"Frodo", "Sam", "Merry", "Pippin"
};
using (var set = new SynchronisedHashSet <string>(items))
{
set.TryRemove("Frodo");
Assert.IsFalse(set.Contains("Frodo"));
Assert.AreEqual(3, set.Count);
}
}