public async Task GetAllByListIdAsync_Should_Return_All_Todo_Items_From_A_List()
    {
        // Arrange
        var todoItems = Builder <TodoItem> .CreateListOfSize(10).Build().ToList();

        TodoItemRepository.GetAllAsync(Arg.Any <Expression <Func <TodoItem, bool> > >()).Returns(todoItems);

        // Act
        var result = await _sut.GetAllByListIdAsync(Guid.NewGuid());

        // Assert
        result.Should().HaveCount(10);
        await TodoItemRepository.Received().GetAllAsync(Arg.Any <Expression <Func <TodoItem, bool> > >());
    }