As noted in the alpha change list, this was an intentional change in what
instrument does. Instrument is intended to be used to verify that other
callers have invoked a function correctly. Checking that the function works
(by verifying that :ret and :fn return valid results) should be done using
one of the spec.test functions during testing.
Some other spec features are still to be added as well that relate to this
change.
On Tuesday, June 14, 2016 at 7:01:09 PM UTC-5, Alan Thompson wrote:
>
> Hi - Just noticed that the :ret function in fdef seems to be ignored in
> 1.9.0-alpha6:
>
> user=> (require '[clojure.spec :as s])
> user=> (defn dummy [x] (if x "yes" "no"))
> user=> (s/fdef dummy
> #_=> :args (s/cat :x integer?)
> #_=> :ret integer?)
> user=> (s/instrument #'dummy)
> user=> (dummy 3) (println *clojure-version*)
> ExceptionInfo Call to #'user/dummy did not conform to spec:
> val: "yes" fails at: [:ret] predicate: integer?
> :clojure.spec/args (3)
> clojure.core/ex-info (core.clj:4703)
> {:major 1, :minor 9, :incremental 0, :qualifier alpha5}
>
> ;-------------------------------------------------------------------
>
> user=> (dummy 3) (println *clojure-version*)
> "yes"
> {:major 1, :minor 9, :incremental 0, :qualifier alpha6}
>
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