public async void Should_ReturnNullForSpecificShoppingList() { var options = ReturnDbContextOptions("Should_ReturnNullForSpecificShoppingList"); // Arrange using (var context = new ShoppingListContext(options)) { var sut = new ShoppingListController(new Repository(context)); // Act var result = await sut.GetShoppingListWithRelatedItemsAsync(5); // Assert Assert.Null(result.Value); } }