Not sure how to implement test

[Garklein]

When I got to the self hosting step, I had a bug that took me a week to track down. It was that whenever a hashmap was in a function and the function was called, it would replace the parameters in the mal function ast hashmap with the data of the arguments that the function was being called with. It happened because of JS's stupid object copying system.
How I found it was by making a function in mal that prints the ast of a mal function.

user>(def! test (fn* (x) {:test x}))
#<function>
user>(prnfn test)
{:test x}
nil
user> (test 3)
{:test 3}
user>(prnfn test)
{:test 3}
nil

I want to add this as a test at the function step to help people in the future, but I'm not sure how, because in different languages the asts are stored differently in mal functions.

[Garklein]

Never mind, I'll just find a situation where it crashes it and use that.