public async void DeleteDocumentUpdateWithInvalidDocIdReturnsNotFound()
        {
            using (var context = DbTestContext.GenerateContextWithData())
                using (var controller = new DocumentsController(context, _mapper))
                {
                    var result = await controller.DeleteDocumentUpdate(999, 1);

                    Assert.IsType <NotFoundResult>(result);
                }
        }
        public async void DeleteDocumentUpdateModelStateErrorReturnsBadRequest()
        {
            using (var context = DbTestContext.GenerateContextWithData())
                using (var controller = new DocumentsController(context, _mapper))
                {
                    controller.ModelState.AddModelError("an error", "some error");

                    var result = await controller.DeleteDocumentUpdate(1, 1);

                    Assert.IsType <BadRequestObjectResult>(result);
                }
        }
        public async void DeleteDocumentUpdateIdDeletesDocumentUpdate()
        {
            using (var context = DbTestContext.GenerateContextWithData())
                using (var controller = new DocumentsController(context, _mapper))
                {
                    DocumentUpdate dup = context.DocumentUpdates.AsNoTracking().Last();

                    var result = await controller.DeleteDocumentUpdate(dup.DocumentId, dup.Id);

                    DocumentUpdateDto a3 = _mapper.Map <DocumentUpdateDto>(dup);

                    Assert.NotNull(result);
                    var okObjectResult = Assert.IsType <OkObjectResult>(result);
                    var resultValue    = okObjectResult.Value;
                    Assert.Equal(a3, resultValue);
                }
        }