public async Task BoardService_FindWithTasksAsync_InputInvalid_Should_ReturnNull()
{
var mockUnitOfWork = new Mock <IUnitOfWork>();
var mockBoardRepository = new MockBoardRepository().MockFindByIdWithTasksAsyncInvalid();
var boardService = new BoardService(mockBoardRepository.Object, mockUnitOfWork.Object);
var results = await boardService.FindWithTasksAsync(1);
Assert.IsNull(results);
mockBoardRepository.VerifyFindByIdWithTasksAsync(Times.Once());
}