public void Suprious_SelectedIndex_Changes_Should_Not_Be_Triggered() { var target = new TestSelector { Items = new[] { "foo", "bar", "baz" }, Template = Template(), }; target.ApplyTemplate(); var selectedIndexes = new List<int>(); target.GetObservable(TestSelector.SelectedIndexProperty).Subscribe(x => selectedIndexes.Add(x)); target.SelectedItems = new PerspexList<object> { "bar", "baz" }; target.SelectedItem = "foo"; Assert.Equal(0, target.SelectedIndex); Assert.Equal(new[] { -1, 1, 0 }, selectedIndexes); }