public async Task CanSaveZeroTasks()
        {
            var options = CreateNewContextOptions();

            const string userId = "1";
            var user = new ApplicationUser {Id = userId};

            using (var context = new AllReadyContext(options))
            {
                context.Users.Add(user);
                await context.SaveChangesAsync();
            }

            var message = new UpdateMyTasksCommand { UserId =userId, TaskSignups = new List<TaskSignupViewModel>() };

            using (var context = new AllReadyContext(options))
            {
                var sut = new UpdateMyTasksCommandHandler(context);
                await sut.Handle(message);
            }

            using (var context = new AllReadyContext(options))
            {
                var taskSignups = context.TaskSignups.Count();
                Assert.Equal(taskSignups, 0);
            }
        }
        public async Task InvokeUpdateTaskSignupAsyncWithTheCorrectParametersForEachTaskSignupViewModelOnCommand()
        {
            var options = CreateNewContextOptions();

            const string userId = "1";
            const int taskSignupId = 1;
            var user = new ApplicationUser {Id = userId};
            var dateTimeUtcNow = DateTime.UtcNow;
            var taskSignupViewModels = new List<TaskSignupViewModel>
            {
                new TaskSignupViewModel { Id = taskSignupId, StatusDescription = "statusDescription1", Status = "Status1", TaskId = 1, }
            };

            var message = new UpdateMyTasksCommand { TaskSignups = taskSignupViewModels, UserId = userId};

            using (var context = new AllReadyContext(options))
            {
                context.Users.Add(user);
                context.TaskSignups.Add(new TaskSignup { Id = taskSignupId });
                context.Tasks.Add(new AllReadyTask { Id = 1 });
                await context.SaveChangesAsync();
            }

            using (var context = new AllReadyContext(options))
            {
                var sut = new UpdateMyTasksCommandHandler(context) { DateTimeUtcNow = () => dateTimeUtcNow };
                await sut.Handle(message);
            }

            using (var context = new AllReadyContext(options))
            {
                var signup = context.TaskSignups.FirstOrDefault(x => x.Id == taskSignupId);
                Assert.Equal(signup != null, true);
            }
        }