public void TestRemoveAt()
{
var list = new List <string> {
"aaa", "bbb", "ccc"
};
var set = new ObservableSet <string>(list);
Assert.Equal(set.Count, list.Count);
bool propertyChangedInvoked = false;
bool collectionChangedInvoked = false;
set.PropertyChanged += (sender, e) =>
{
Assert.Equal(nameof(ObservableSet <string> .Count), e.PropertyName);
propertyChangedInvoked = true;
};
set.CollectionChanged += (sender, e) =>
{
Assert.Equal(NotifyCollectionChangedAction.Remove, e.Action);
Assert.Equal(1, e.OldStartingIndex);
Assert.NotNull(e.OldItems);
Assert.Equal(1, e.OldItems.Count);
Assert.Equal("bbb", e.OldItems[0]);
collectionChangedInvoked = true;
};
set.RemoveAt(1);
Assert.Equal(2, set.Count);
Assert.Equal("aaa", set[0]);
Assert.Equal("ccc", set[1]);
Assert.True(propertyChangedInvoked);
Assert.True(collectionChangedInvoked);
}
public void TestRemoveAt()
{
var list = new List<string> { "aaa", "bbb", "ccc" };
var set = new ObservableSet<string>(list);
Assert.AreEqual(set.Count, list.Count);
bool propertyChangedInvoked = false;
bool collectionChangedInvoked = false;
set.PropertyChanged += (sender, e) =>
{
Assert.AreEqual(e.PropertyName, nameof(ObservableSet<string>.Count));
propertyChangedInvoked = true;
};
set.CollectionChanged += (sender, e) =>
{
Assert.AreEqual(e.Action, NotifyCollectionChangedAction.Remove);
Assert.AreEqual(e.OldStartingIndex, 1);
Assert.NotNull(e.OldItems);
Assert.AreEqual(e.OldItems.Count, 1);
Assert.AreEqual(e.OldItems[0], "bbb");
collectionChangedInvoked = true;
};
set.RemoveAt(1);
Assert.AreEqual(set.Count, 2);
Assert.AreEqual(set[0], "aaa");
Assert.AreEqual(set[1], "ccc");
Assert.True(propertyChangedInvoked);
Assert.True(collectionChangedInvoked);
}
