public async Task UpdateAsync_Should_Throw_Exception_If_List_Does_Not_Exist_Anymore()
{
// Arrange
var updateTodoItem = Builder <UpdateTodoItemModel> .CreateNew().Build();
_todoListRepository.GetFirstAsync(Arg.Any <Expression <Func <TodoList, bool> > >()).ReturnsNull();
// Act
Func <Task> callCreateAsync = async() => await _sut.UpdateAsync(Guid.NewGuid(), updateTodoItem);
// Assert
callCreateAsync.Should().Throw <NotFoundException>().WithMessage("List does not exist anymore");
await _todoListRepository.Received().GetFirstAsync(Arg.Any <Expression <Func <TodoList, bool> > >());
}
