public void TestSymmetricExceptWith()
{
_set.CollectionChanged += (sender, args) =>
{
Assert.AreEqual(1, args.AddedItems.Count);
Assert.AreEqual(1, args.RemovedItems.Count);
Assert.AreEqual("item 4", args.AddedItems.First());
Assert.AreEqual("item 2", args.RemovedItems.First());
};
_set.SymmetricExceptWith(new[] { "item 2", "item 4" });
ExpectChangeCalls(1, 0);
_set.SymmetricExceptWith(new string[0]);
ExpectChangeCalls(0);
}
public void TestSymmetricExceptWith()
{
_set.CollectionChanged += (sender, args) =>
{
Assert.AreEqual(NotifyCollectionChangedAction.Replace, args.Action);
Assert.AreEqual(1, args.NewItems.Count);
Assert.AreEqual(1, args.OldItems.Count);
Assert.AreEqual("item 4", args.NewItems[0]);
Assert.AreEqual("item 2", args.OldItems[0]);
};
_set.SymmetricExceptWith(new[] { "item 2", "item 4" });
ExpectChangeCalls(1);
_set.SymmetricExceptWith(new string[0]);
ExpectChangeCalls(0);
}
public void SetOperationsTest()
{
const int initialCount = 15;
const int removeItems = 4;
const int insertItems = 2;
var items = new[] { 40, 63, 98, 20, 24, 76, 96, 53, 5, 11, 29, 12, 46, 59, 7, 45, 86, 91, 57, 95 };
var indexes = new[] { 6, 2, 5, 11, 0, 3, 13, 1 };
var originalSet = new HashSet <Person>(items.Take(initialCount).Select(x => new Person(x)), new PersonEqualityComparer());
var set = new ObservableSet <Person>(originalSet);
var sorted = new SortedReadOnlyObservableList <Person>(set, (x, y) => x.Age.CompareTo(y.Age),
new PersonEqualityComparer(), nameof(Person.Age));
Assert.AreEqual(initialCount, set.Count);
Assert.AreEqual(initialCount, sorted.Count);
Assert.IsTrue(items.Take(initialCount).Select(x => new Person(x)).OrderBy(p => p.Age).SequenceEqual(sorted, new PersonEqualityComparer()));
foreach (var person in indexes.Take(removeItems).Select(i => new Person(items[i])))
{
set.Remove(person);
}
Assert.AreEqual(initialCount - removeItems, set.Count);
Assert.AreEqual(initialCount - removeItems, sorted.Count);
Assert.IsTrue(originalSet.OrderBy(p => p.Age).SequenceEqual(sorted, new PersonEqualityComparer()));
foreach (var person in items.Skip(initialCount).Take(insertItems).Select(x => new Person(x)))
{
set.Add(person);
}
Assert.AreEqual(initialCount - removeItems + insertItems, set.Count);
Assert.AreEqual(initialCount - removeItems + insertItems, sorted.Count);
Assert.IsTrue(originalSet.OrderBy(p => p.Age).SequenceEqual(sorted, new PersonEqualityComparer()));
foreach (var result in indexes.Skip(removeItems)
.Zip(items.Skip(initialCount + insertItems),
(i, x) => new { OldItem = new Person(items[i]), NewItem = new Person(x) }))
{
set.SymmetricExceptWith(new[] { result.OldItem, result.NewItem });
}
Assert.AreEqual(initialCount - removeItems + insertItems, set.Count);
Assert.AreEqual(initialCount - removeItems + insertItems, sorted.Count);
Assert.IsTrue(originalSet.OrderBy(p => p.Age).SequenceEqual(sorted, new PersonEqualityComparer()));
set.Clear();
Assert.AreEqual(0, set.Count);
Assert.AreEqual(0, sorted.Count);
}