public async Task ThrowAsyncIfNotExists()
        {
            var mockRepository = new Mock <IRepository <ToDoList> >();

            mockRepository.Setup(x => x.Get(It.IsAny <Guid>())).ReturnsAsync(null as ToDoList);
            var handler = new DeleteToDoListCommandHandler(mockRepository.Object, new Mock <ILogger <DeleteToDoListCommandHandler> >().Object);

            await Assert.ThrowsAsync <NotFoundException>(async() => await handler.Handle(new DeleteToDoListCommand(), new System.Threading.CancellationToken()));
        }
        public async Task ReturnViewModelIfValid()
        {
            var mockRepository = new Mock <IRepository <ToDoList> >();

            mockRepository.Setup(x => x.Get(It.IsAny <Guid>())).ReturnsAsync(Builder <ToDoList> .CreateNew().Build());
            var handler = new DeleteToDoListCommandHandler(mockRepository.Object, new Mock <ILogger <DeleteToDoListCommandHandler> >().Object);

            var response = await handler.Handle(new DeleteToDoListCommand(), new System.Threading.CancellationToken());

            Assert.True(response);
        }