public void ConcurrentHashSet()
{
ConcurrentHashSet <int> playSet = new ConcurrentHashSet <int>();
ConcurrentHashSet <int> smallSet = new ConcurrentHashSet <int>(new int[] { 0, 1 });
ConcurrentHashSet <int> bigSet = new ConcurrentHashSet <int>(new int[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }, EqualityComparer <int> .Default);
ConcurrentHashSet <int> nullSet = null;
Assert.AreEqual(EqualityComparer <int> .Default, bigSet.Comparer);
Assert.IsFalse(string.IsNullOrEmpty(smallSet.ToString()));
Assert.IsTrue(smallSet.IsProperSubsetOf(bigSet));
Assert.IsTrue(smallSet.IsSubsetOf(bigSet));
Assert.IsTrue(bigSet.IsProperSupersetOf(smallSet));
Assert.IsTrue(bigSet.IsSupersetOf(smallSet));
playSet.TryAdd(0);
((ICollection <int>)playSet).Add(1);
Assert.IsTrue(playSet.Contains(0));
Assert.IsTrue(smallSet.SetEquals(playSet));
Assert.IsFalse(smallSet.SetEquals(bigSet));
Assert.IsFalse(smallSet.SetEquals(null));
Assert.IsTrue(smallSet.IsSubsetOf(playSet));
Assert.IsFalse(bigSet.IsSubsetOf(playSet));
Assert.IsFalse(bigSet.IsSubsetOf(null));
Assert.IsFalse(playSet.IsSupersetOf(bigSet));
Assert.IsTrue(playSet.IsSupersetOf(null));
Assert.IsFalse(bigSet.IsSubsetOf(playSet));
Assert.IsFalse(bigSet.IsSubsetOf(null));
Assert.IsFalse(smallSet.IsProperSubsetOf(playSet));
Assert.IsFalse(playSet.IsProperSupersetOf(smallSet));
Assert.IsTrue(playSet.IsProperSupersetOf(null));
Assert.IsFalse(smallSet.IsProperSubsetOf(null));
Assert.IsFalse(smallSet.IsProperSubsetOf(new ConcurrentHashSet <int>(new int[] { 3, 4, 5 })));
Assert.IsFalse(smallSet.IsSupersetOf(new ConcurrentHashSet <int>(new int[] { 3, 4, 5 })));
Assert.IsFalse(smallSet.IsSubsetOf(new ConcurrentHashSet <int>(new int[] { 3, 4, 5 })));
Assert.IsFalse(new ConcurrentHashSet <int>(new int[] { 3, 4, 5 }).IsProperSupersetOf(smallSet));
Assert.IsFalse(new ConcurrentHashSet <int>(new int[] { 3, 4, 5 }).IsSupersetOf(smallSet));
Assert.IsFalse(new ConcurrentHashSet <int>(new int[] { 3, 4, 5 }).Overlaps(smallSet));
IEqualityComparer <ConcurrentHashSet <int> > setComparer = ConcurrentHashSet <int> .CreateSetComparer();
Assert.IsTrue(setComparer.Equals(smallSet, playSet));
Assert.IsFalse(setComparer.Equals(bigSet, playSet));
Assert.AreEqual(setComparer.GetHashCode(smallSet), setComparer.GetHashCode(playSet));
Assert.IsTrue(setComparer.Equals(smallSet, smallSet));
Assert.IsFalse(setComparer.Equals(smallSet, nullSet));
Assert.IsFalse(setComparer.Equals(nullSet, smallSet));
Assert.IsFalse(smallSet.IsReadOnly);
Assert.IsTrue(smallSet.Overlaps(bigSet));
Assert.IsFalse(smallSet.Overlaps(null));
int[] test = new int[2];
smallSet.CopyTo(test);
smallSet.CopyTo(test, 0);
smallSet.Add(2);
playSet.Remove(1);
bigSet.ExceptWith(playSet);
bigSet.ExceptWith(null);
Assert.IsFalse(bigSet.Contains(0));
Assert.IsTrue(bigSet.Contains(1));
smallSet.IntersectWith(playSet);
Assert.IsTrue(smallSet.Contains(0));
Assert.IsFalse(smallSet.Contains(1));
ConcurrentHashSet <int> niSet = new ConcurrentHashSet <int>();
niSet.Add(0);
Assert.IsFalse(niSet.IsEmpty);
niSet.IntersectWith(null);
Assert.IsTrue(niSet.IsEmpty);
niSet.Add(0);
Assert.AreEqual(1, niSet.Count);
niSet.RemoveWhere(null);
Assert.AreEqual(1, niSet.Count);
smallSet.IntersectWith(playSet);
playSet.Add(0);
playSet.Add(2);
playSet.RemoveWhere(n => n != 0);
Assert.IsTrue(playSet.Contains(0));
Assert.IsFalse(playSet.Contains(1));
playSet.Add(0);
playSet.Add(2);
smallSet.Add(1);
playSet.SymmetricExceptWith(smallSet);
playSet.SymmetricExceptWith(null);
Assert.IsFalse(playSet.Contains(0));
Assert.IsTrue(playSet.Contains(1));
Assert.IsTrue(playSet.Contains(2));
playSet.UnionWith(smallSet);
playSet.UnionWith(null);
Assert.IsTrue(playSet.Contains(0));
Assert.IsTrue(playSet.Contains(1));
Assert.IsTrue(playSet.Contains(2));
Assert.IsFalse(playSet.Contains(3));
playSet.Clear();
Assert.IsFalse(smallSet.IsSubsetOf(playSet));
foreach (object o in ((System.Collections.IEnumerable)smallSet))
{
Assert.IsTrue(o is int);
Assert.IsTrue((int)o < 10);
}
}