public async Task Handle_GivenNullRequest_ShouldThrowArgumentNullException()
        {
            // Arrange
            var sut = new GetNotificationsForPlayerQueryHandler(It.IsAny <IDeletableEntityRepository <Notification> >(), It.IsAny <IMapper>());

            // Act & Assert
            await Should.ThrowAsync <ArgumentNullException>(sut.Handle(null, It.IsAny <CancellationToken>()));
        }
        public async Task Handle_GivenValidRequest_ShouldReturnViewModel()
        {
            // Arrange
            var query = new GetNotificationsForPlayerQuery {
                UserId = "Foo1"
            };
            var sut = new GetNotificationsForPlayerQueryHandler(this.deletableEntityRepository, this.mapper);

            this.dbContext.Notifications.Add(new Notification {
                PlayerId = "Foo1", Content = "TestContent", Header = "TestHeader", Type = Domain.Entities.Enums.NotificationType.Info
            });
            this.dbContext.SaveChanges();

            // Act
            var viewModel = await sut.Handle(query, It.IsAny <CancellationToken>());

            // Assert
            viewModel.ShouldNotBeNull();
            viewModel.Notifications.Count().ShouldBe(1);
        }