public void GetEnvelopeDetect_ReturnsCorrectEnvelopeDetect()
{
Assert.Equal(EnvelopeDetect.Yes, AttributeHelpers.GetEnvelopeDetect("YES"));
Assert.Equal(EnvelopeDetect.No, AttributeHelpers.GetEnvelopeDetect("NO"));
Assert.Equal(EnvelopeDetect.Inactive, AttributeHelpers.GetEnvelopeDetect("INACTIVE"));
Assert.Null(AttributeHelpers.GetEnvelopeDetect(""));
Assert.Null(AttributeHelpers.GetEnvelopeDetect(null));
Assert.Null(AttributeHelpers.GetEnvelopeDetect("SOME_RANDOM_STRING"));
}