can you sketch it out a bit? i bet there's a good clean solution without redefs and dynamic vars

What I need for some of my tests is created through something that I'm also testing in the same test namespace

Imagine: (def thing (make-thing))

But if I just def this in my tests, so the tests that needs thing just use it from def. It means if (make-thing) doesn't work, the def could fail

So I want to first run my tests for (make-thing)

And when they pass, run my tests that use make-thing

So I create the thing in the middle of my test-ns-hook

After the (make-thing) tests, and before the tests that need a thing

that sounds like break them into two tests. test creating the thing. and then test handling of the thing with a well-formed test version of the thing

that way you can test the latter half with the bad conditions that can arise as well

They are two tests

But the order matters then. Like, I can't create the thing until I've run the test for it.

But I need the thing for the other test

and it has to be that thing that is created? you can't mock one or have generated input to the second test?

Its an integ test

And the thing is a remote client

So I do need it

ah i see now.

I mean, I'm definitly being a bit pedantic. Because the edge case is that (make-thing) throws an exception, and then I'm not sure what happens to the test when running if a def in a test namespace throws

I assumed it breaks the tests from running. So by first testing that make-thing works, I'm hoping instead of say, the tests not running at all because it threw an exception in the def, instead I see tests failing for make-thing that show me directly where the error is

Anyways, dynamic vars were not that ugly to put in. But I feel its too bad deftest can't take args. Would be nice just for say running a bunch of tests over a huge list of inputs or something.

You could do: (defn test-ns-hook [] (doseq [x list-of-test-inputs] (the-test x)))

wat? (reduce + 0 [1 2 3 nil]) => java.lang.NullPointerException (reduce (fnil + 0) 0 [1 2 3 nil]) => java.lang.NullPointerException

fnil is the first argument not the second, right?

when you get to the 3 you're calling (+ 6 nil) and boom

([a b] (f (if (nil? a) x a) b)) should be the branch here. a is 6 so you get a and the b without changing it

so it has to be like this (reduce #((fnil + 0) %2 %1) 0 [1 2 3 nil])

kinda ugly

if you have a swap function you could comp it in there maybe

(reduce (comp (fnil + 0) swap) 0 [1 2 3 nil]))

(reduce (partial swap (fnil + 0)) 0 [1 2 3 nil]) where (defn swap [f x y] (f y x))

looks nicer in haskell i'm sure

(reduce + (filter some? [1 2 3 nil]))

Or (->> [1 2 4 nil] (filter some?) (reduce +))

You could do (fnil + 0 0) and not need swap

If you want to use fnil: (reduce (fnil + 0 0) [1 2 3 nil])

fnil replaces nils positionally with however many default args you suplly

Oh! Editing...

... Which is what you said...

i always forget about the other arities of fnil. despite having just looked at the source lol

It's one of my favorite little gems

hi, quick q, i have a lein project with a main entry point; Is there anyway to not run -main when just doing a lein repl ? I don't like having to constantly change my project.clj just to get to my repl.

especially since my program takes [& args]

Hey @joefromct, see here: https://github.com/technomancy/leiningen/blob/stable/sample.project.clj#L362-L364 -- there's a nested keyword option you can set in your project.clj: :repl-options > :init-ns. You set it to the namespace that you want to load for REPL sessions.

@joefromct I use a special user namespace that is specifically for my REPL sessions. It imports other libraries and defines functions that I use often in the REPL. I got the idea from here: http://www.luminusweb.net/docs#creating_a_new_application (The Luminus project template is focused on web apps, but it might still be helpful for you)

thats exactly what i needed thank you

I have a clojure nrepl server running on an ubutnu server , but I cannot remotly connect via nrepl. Probably the port is blocked. Is there a way I can use my ssh connection to connect via ssh?

I dont want to expose this port also, it would be insecure

So somehow I would like to forward the nrepl port through my ssh connection

@mx2000 you’re possibly looking for ssh port forwarding https://www.ssh.com/ssh/tunneling/example

@mx2000 the connection is from the local host only intentionally since a repl is a huge security hole

but yes, the right thing to do is port forward

Hello! Is there any sensible mobile app/mobile website that can teach daily bits of clojure or clojurescript on iOS? I am looking for little coding challenges, discussions on architecture, tips and tricks etc… Thanks 🙂

there is an iOS repl somewhere out there

https://github.com/mfikes/replete