public async Task Handle_Invalid_Throws()
        {
            // arrange
            var request = new CreateFileCommand()
            {
                Name           = "Test",
                ParentFolderId = new Guid("97b7e004-be8e-424d-90c9-fa070996beb1")
            };

            var repositoryMock = new Mock <IRepository <File> >();

            repositoryMock.Setup(x => x.Insert(It.IsAny <File>(), CancellationToken.None)).ThrowsAsync(new Exception());


            var _mediatorMock = new Mock <IMediator>();

            _mediatorMock.Setup(x => x.Send(It.IsAny <GetFolderQuery>(), CancellationToken.None)).ReturnsAsync(new FolderDto()
            {
                HierarchyId = "/Test/"
            });


            var handler = new CreateFileCommandHandler(repositoryMock.Object, AutomapperFactory.Get(), _mediatorMock.Object);

            // act
            await Assert.ThrowsAsync <CreateException>(() => handler.Handle(request, CancellationToken.None));

            // assert
            repositoryMock.Verify(x => x.Insert(It.IsAny <File>(), CancellationToken.None), Times.Once);
            repositoryMock.VerifyNoOtherCalls();
        }
        public async Task Handle_Valid_Inserts()
        {
            // arrange
            var request = new CreateFileCommand()
            {
                Name           = "Test",
                ParentFolderId = new Guid("97b7e004-be8e-424d-90c9-fa070996beb1")
            };

            var  mockRes      = new Guid("a87887ec-df44-4607-9e6f-28f361670f9b");
            File fileToAssert = null;

            var repositoryMock = new Mock <IRepository <File> >();
            var insertSetup    = repositoryMock.Setup(x => x.Insert(It.IsAny <File>(), CancellationToken.None));

            insertSetup.ReturnsAsync(mockRes);
            insertSetup.Callback((File file, CancellationToken _) => fileToAssert = file);

            var _mediatorMock = new Mock <IMediator>();

            _mediatorMock.Setup(x => x.Send(It.IsAny <GetFolderQuery>(), CancellationToken.None)).ReturnsAsync(new FolderDto()
            {
                HierarchyId = "/Test/"
            });


            var handler = new CreateFileCommandHandler(repositoryMock.Object, AutomapperFactory.Get(), _mediatorMock.Object);

            // act
            var result = await handler.Handle(request, CancellationToken.None);

            // assert
            repositoryMock.Verify(x => x.Insert(It.IsAny <File>(), CancellationToken.None), Times.Once);
            repositoryMock.VerifyNoOtherCalls();
            Assert.Equal(mockRes, result);
            Assert.Equal(fileToAssert.Name, request.Name);
            Assert.Equal(fileToAssert.ParentFolderId, request.ParentFolderId);
        }