public async Task GenerateNotificationsAsync_With1EventFor1UsersWhereEventIsOutsideOfTravelPreference_SendsNoEmail()
        {
            // Arrange
            List <Event> events = GetEventList1();
            List <User>  users  = GetUserList1();

            events[0].EventDate = DateTimeOffset.UtcNow.AddDays(3);

            EventRepository.Setup(e => e.GetActiveEvents(It.IsAny <CancellationToken>())).ReturnsAsync(events);
            UserRepository.Setup(u => u.GetAllUsers(It.IsAny <CancellationToken>())).ReturnsAsync(users);

            // Setup a return of distance between User and Event of 50 (in whatever units)
            MapRepository.Setup(mr => mr.GetDistanceBetweenTwoPoints(It.IsAny <Tuple <double, double> >(), It.IsAny <Tuple <double, double> >(), It.IsAny <bool>())).ReturnsAsync(50);

            // Act
            await Engine.GenerateNotificationsAsync().ConfigureAwait(false);

            // Assert
            UserRepository.Verify(_ => _.GetAllUsers(It.IsAny <CancellationToken>()), Times.Once);
            EventRepository.Verify(_ => _.GetActiveEvents(It.IsAny <CancellationToken>()), Times.Once);
            UserNotificationPreferenceRepository.Verify(_ => _.GetUserNotificationPreferences(It.IsAny <Guid>(), It.IsAny <CancellationToken>()), Times.Once);
            EventAttendeeRepository.Verify(_ => _.GetEventsUserIsAttending(It.IsAny <Guid>(), It.IsAny <bool>(), It.IsAny <CancellationToken>()), Times.Once);
            UserNotificationRepository.Verify(_ => _.AddUserNotification(It.IsAny <UserNotification>()), Times.Never);
            EmailSender.Verify(_ => _.SendEmailAsync(It.IsAny <Email>(), It.IsAny <CancellationToken>()), Times.Never);
        }