public void TestIntersectWith()
{
var other = new[] { "item 1", "item 3" };
var skipNotifierAssertions = false;
_set.CollectionChanged += (sender, args) =>
{
if (skipNotifierAssertions || args.RemovedItems.IsEmpty())
{
return;
}
Assert.IsEmpty(args.AddedItems);
Assert.AreEqual(1, args.RemovedItems.Count);
Assert.AreEqual("item 2", args.RemovedItems.First());
};
// Array
_set.IntersectWith(other);
ExpectChangeCalls(1);
_set.Add("item 2");
ExpectChangeCalls(1);
// HashSet
_set.IntersectWith(new HashSet <string>(other));
ExpectChangeCalls(1);
_set.Add("item 2");
ExpectChangeCalls(1);
// ObservableSet
_set.IntersectWith(new ObservableSet <string>(other));
ExpectChangeCalls(1);
_set.Add("item 2");
ExpectChangeCalls(1);
// No changes
_set.IntersectWith(new[] { "item 1", "item 3", "item 2" });
ExpectChangeCalls(0);
// Empty
skipNotifierAssertions = true;
_set.Clear();
ExpectChangeCalls(1);
_set.IntersectWith(new[] { "item 1", "item 3" });
ExpectChangeCalls(0);
}
