public void Should_CalculateSchedule_ThrowException_WhenTheSubscriptionTypeIsIncorrect(SubscriptionMode mode)
        {
            // Arrange
            var sut = new DailyNotificationScheduleStrategy();

            // Act
            Action action = () => sut.CalculateSchedule(_fixture.GetSubscription(mode), DateTime.Today, 1);

            // Assert
            action.Should().Throw <ArgumentException>();
        }
        public void Should_CalculateSchedule_ReturnTheCorrectDateRange_WhenStartDateAndNumberOfDaysAreValid()
        {
            // Arrange
            var sut = new DailyNotificationScheduleStrategy();

            // Act
            var actual = sut.CalculateSchedule(new DailySubscription(), DateTime.Today, 1);

            // Assert
            actual.Should().ContainInOrder(DateTime.Today);
        }