public void GetAllRateTypes_ShouldReturnAllValidValues_UnderAllConditions()
{
// Arrange & Act
RateType[] output = CUT.GetAllRateTypes().ToArray();
// Assert
output.ShouldNotBeNull();
output.ShouldNotBeEmpty();
output.ShouldContain(RateType.Enrollment);
output.ShouldContain(RateType.Switch);
output.ShouldContain(RateType.Renewal);
output.ShouldContain(RateType.Intro);
output.ShouldContain(RateType.Winback);
}
