On Friday, June 10, 2016 at 8:58:10 AM UTC-4, Steen Larsen wrote:
>
> Hi,
>
> I am playing around with spec, and really like it so far, but have a
> problem using fdef with maps. I am obviously missing something trivial, but
> the following example gives a, to me, weird error
>
> (defn command [m]
> "hello")
>
> (s/def ::test integer?)
>
> (s/fdef command
> :args (s/keys :req [::test])
> :ret string?)
>
> Running
>
> (command {:test 3})
>
> gives
>
> Call to #'cqrs-spec.core/command did not conform to spec: val:
> ({:test 3}) fails at: [:args] predicate: map? :clojure.spec/args
> ({:test 3})
>
> {:clojure.spec/problems
> {[:args] {:pred map?, :val ({:test 3}), :via [], :in []}},
> :clojure.spec/args ({:test 3})}
>
> which seems to say that the function receives a list and not a map, even
> though it obviously does. Now why is that ?
>
> /Steen
>
At a guess, it looks like it's checking that *all the arguments*
constitutes a map, rather than that *the first argument* constitutes a map.
(Also: what is typically the type of the last argument when calling apply?)
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