Ok, there is a slight issue with test comparing lists. Atm whenever I compare two identical lists whose only difference is type or nullability it causes an error. For instance:

sys::Str[Daniel Fath, John Doe] != sys::Str?[Daniel Fath, John Doe]

I tried forcefully giving a local variable a Str? type but to no avail. It's not a big issue but it's a definite gotcha for me.

IMHO that should be solved either by having a separate verifyEqContent method or by allowing me to manually override the type in an elegant manner like a Str?[] data := [Daniel Fath, John Doe]

Yes you are correct - list equality does consider type equality as well as the contents.

For testing purposes, I think this is important. If you expect a method to return Str[] and it returns Str?[], then your tests should capture this.

So I personally always explicitly like to see the type in the verifyEq.

me to manually override the type in an elegant manner like a Str?[] data := [Daniel Fath, John Doe]

You just declare your list with a type:

data := Str?[Daniel Fath, John Doe]

Tnx brian. I did solve my problem by making it a field, though your way is better.