public async Task ShouldReturnNotFoundIfModuleDoesntExist_DeleteModule()
        {
            int wrongId = 46;

            var mockRepo = new Mock <IDataRepository>();
            ModulesController controller = new ModulesController(mockRepo.Object);

            var result = await controller.DeleteModule(wrongId);

            Assert.IsInstanceOfType(result, typeof(NotFoundResult));
        }