So I tried some more and figured out that its the ::autoinc key that causes 
this:
(s/def ::column (s/keys :req-un [::name ::type]
                        :opt-un [::null ::max-length
                                 ::required ::pk
                                 ::autoinc                           
 ;;;;;;;; this one
                                 ::unique ::default
                                 ::refs ::fk-name]))

When I comment that key, no error occurs, if I uncomment it, spec 
validation errors repeatedly.

The only connection I see is that I remove exactly this k/v pair from the 
map in my specced function:

(s/fdef remove-autoinc-columns :args (s/cat :cols (s/spec ::schem/columns))
        :ret ::schem/columns)
(defn remove-autoinc-columns [cols]
  (remove #(= true (:autoinc %)) cols))

But still, as it is an optional key I dont see why it should cause errors?

Thanks,
Sven

Am Montag, 30. Mai 2016 07:38:19 UTC+2 schrieb Sven Richter:
>
> Hi,
>
> So I looked at generating specs for tests and I hit an error I just dont 
> understand / neither can fix it. This is my code:
>
> (s/def ::column-types #{:int :varchar :boolean :text :time :date
>                         :char :binary :smallint :bigint :decimal
>                         :float :double :real :timestamp})
>
> (s/def ::name (s/and string? #(not= "" %)))
> (s/def ::boolean (s/or :t true? :f false?))
>
> (s/def ::type ::column-types)
> (s/def ::null ::boolean)
> (s/def ::max-length (s/and integer? #(< 0 %)))
> (s/def ::required ::boolean)
> (s/def ::pk ::boolean)
> (s/def ::autoinc ::boolean)
> (s/def ::unique ::boolean)
> (s/def ::default (s/or :string string? :boolean ::boolean))
> (s/def ::refs ::none-empty-string)
> (s/def ::fk-name ::none-empty-string)
> ​
> (s/def ::column (s/keys :req-un [::name ::type]
>                         :opt-un [::null ::max-length ::required ::pk 
> ::autoinc ::unique ::default
>                                  ::refs ::fk-name]))
> (s/def ::columns (s/cat :column (s/+ ::column)))
> ​
> ;function
> (s/fdef remove-autoinc-columns :args (s/cat :cols (s/spec columns))
>         :ret ::schem/columns)
> (defn remove-autoinc-columns [cols]
>   (vec (remove #(= true (:autoinc %)) cols)))
>   
>   
>     
> ; generative test
> (defspec remove-autoinc-column 100
>          (prop/for-all [columns (s/gen ::schem/columns)]
>                        (= (h/remove-autoinc-columns  columns))))
>                        
> ; will fail with something along the lines of:
> ERROR in (remove-autoinc-column) (core.clj:4617)
> Uncaught exception, not in assertion.
> expected: nil
>   actual: clojure.lang.ExceptionInfo: Call to 
> #'de.sveri.clospcrud.helper/remove-autoinc-columns did not conform to spec:
> val: () fails spec: :de.sveri.clospcrud.spec.clospcrud/columns at: [:ret 
> :column] predicate: :de.sveri.clospcrud.spec.clospcrud/column,  
> Insufficient input
> :clojure.spec/args  (({:name "QpJ50qrS1m24V", :type :varchar, :unique 
> true, :required false, :autoinc true, :null true, :pk true, :max-length 14, 
> :fk-name "Tp9tG8hwUXK0"}))
>
> I cannot see where the error is coming from, I generate data according to 
> a spec which I pass to a function that takes this spec exactly.
>
> Any ideas?
>
> Thanks,
> Sven
>

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