Are exceptions caught in unittests?

[Ferhat Kurtulmuş via Digitalmars-d-learn]

When I tried to catch exceptions in my unit test, I found that 
exceptions were not thrown or caught in the unit test blocks. So, 
I cannot use assertThrown at all. Is this a bug or expected 
behavior that I don't know?

Using LDC 1.36.0 on Windows.
https://github.com/aferust/evalex/blob/main/source/evalex.d#L694