Tests are too weak: 3 fixed test, 1 quine test, and no random tests.

This kata is impossible to perform "correctly" short of writing a full blown JS parser. This should not be the intention.

Pretty awesome...

It seems your code doesn't take into account chained method calls. I tried optimising my code to f.toString().replace(...) but it kinda broke everything? Not sure why, but I guess it's related. Would be great if you could look into it, or look over my code and see what's going on there..?

Thanks for pointing these things out! I've updated the description and fixed the issue described!

Thank you. I changed it to assertSimilar.

I think let user return an number array like this:

[line,if statement,property,method,Function inside the function]

It will be more clear, I think.
Any way, you should change your test method to Test.assertSimilar

Thanks for the feedback, let me add the expected values