Hi! does anyone know where to find a good example on how to use clojure.test/report to build custom assertion functions? (I understand that’s the way to go rather than wrapping clojure.test/is)

@facundo: the way to do that is by defining new methods of the assert-expr multimethod. From the clojure.test ns dictating:

EXTENDING TEST-IS (ADVANCED)
You can extend the behavior of the \"is\" macro by defining new
   methods for the \"assert-expr\" multimethod.  These methods are
   called during expansion of the \"is\" macro, so they should return
   quoted forms to be evaluated.

c.t/report is just for reporting, not for assertions

And nice to see you around btw :)

Here you can find some examples from clojure.test itself: https://github.com/clojure/clojure/blob/master/src/clj/clojure/test.clj#L491

thanks for the answer @nberger ! that code was useful, but I figure I wasn’t accurate when I said assertion functions

I actually want to create a function to use instead of is rather that something to call inside is

I already have a working version of what I want, but wrapping is calls. It goes something like this:

(deftest application-crud
  (testing "create a new app"
    (-> (POST "/api/v1/management/applications" {:name "my-app"})
        (expect :status 201
                :body {:name “my-app”}))))

the expect function checks the response of the request against the parameters given (:status, :body, etc)

I already implemented expect wrapping calls to is, which works well enough

the one thing that I’m loosing is the line numbers, which point to the expect definition rather than the failing test. I imagine I could make a macro or something to preserve the line numbers