public void Should_ConfiguredCorrectly()
        {
            // Arrange

            // Act
            var sut = new NeverNotificationScheduleStrategy();

            // Assert
            sut.Mode.Should().Be(SubscriptionMode.Never);
        }
        public void Should_CalculateSchedule_ThrowException_WhenTheSubscriptionTypeIsIncorrect(SubscriptionMode mode)
        {
            // Arrange
            var sut = new NeverNotificationScheduleStrategy();

            // 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 NeverNotificationScheduleStrategy();

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

            // Assert
            actual.Should().BeEmpty();
        }