public async Task CategoriesRenamed_TestAsync() { var authentication = await this.TestContext.LoginRandomAsync(Authority.Admin); var categoryFilter = new UserCategoryFilter() { HasParent = true }; var category = await categoryFilter.GetUserCategoryAsync(app); var parent = category.Parent; var oldName = category.Name; var expectedName = await parent.GenerateNewCategoryNameAsync(); Console.WriteLine($"expectedName: {expectedName}"); await parent.Dispatcher.InvokeAsync(() => { foreach (var item in parent.Categories) { Console.WriteLine($"childName: {item.Name}"); } }); var actualName = string.Empty; await userCategoryCollection.AddCategoriesRenamedEventHandlerAsync(UserCategoryCollection_CategoriesRenamed); await category.RenameAsync(authentication, expectedName); Assert.AreEqual(expectedName, actualName); await userCategoryCollection.RemoveCategoriesRenamedEventHandlerAsync(UserCategoryCollection_CategoriesRenamed); await category.RenameAsync(authentication, oldName); Assert.AreEqual(expectedName, actualName); void UserCategoryCollection_CategoriesRenamed(object sender, ItemsRenamedEventArgs <IUserCategory> e) { var category = e.Items.Single(); actualName = category.Name; } }