diff --git a/tests/Avalonia.Controls.UnitTests/Presenters/ItemsPresenterTests.cs b/tests/Avalonia.Controls.UnitTests/Presenters/ItemsPresenterTests.cs index fddc02f19c..fab57cec49 100644 --- a/tests/Avalonia.Controls.UnitTests/Presenters/ItemsPresenterTests.cs +++ b/tests/Avalonia.Controls.UnitTests/Presenters/ItemsPresenterTests.cs @@ -60,6 +60,25 @@ namespace Avalonia.Controls.UnitTests.Presenters Assert.IsType(target.Panel.Children[1]); } + [Fact] + public void Should_Create_Containers_Only_Once() + { + var parent = new TestItemsControl(); + var target = new ItemsPresenter + { + Items = new[] { "foo", "bar" }, + [StyledElement.TemplatedParentProperty] = parent, + }; + var raised = 0; + + parent.ItemContainerGenerator.Materialized += (s, e) => ++raised; + + target.ApplyTemplate(); + + Assert.Equal(2, target.Panel.Children.Count); + Assert.Equal(2, raised); + } + [Fact] public void ItemContainerGenerator_Should_Be_Picked_Up_From_TemplatedControl() {