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Add :gen/resolve property #1043

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Add :gen/resolve property #1043

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13 changes: 13 additions & 0 deletions src/malli/generator.cljc
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Original file line number Diff line number Diff line change
Expand Up @@ -504,13 +504,25 @@
(when-not (:gen/elements props)
(-generator schema options))))

(defn- -create-from-resolve
[props]
(when (contains? props :gen/resolve)
(let [sym (-> (:gen/resolve props))]
#?(:clj (let [v (requiring-resolve sym)]
(if (instance? clojure.lang.IDeref v)
@v
v))
:cljs (when (cljs.core/exists? sym)
(resolve sym))))))

(defn- -create-from-schema [props options]
(some-> (:gen/schema props) (generator options)))

(defn- -create-from-fmap [props schema options]
(when-some [fmap (:gen/fmap props)]
(gen/fmap (m/eval fmap (or options (m/options schema)))
(or (-create-from-return props)
(-create-from-resolve props)
(-create-from-elements props)
(-create-from-schema props options)
(-create-from-gen props schema options)
Expand All @@ -521,6 +533,7 @@
(m/properties schema))]
(or (-create-from-fmap props schema options)
(-create-from-return props)
(-create-from-resolve props)
(-create-from-elements props)
(-create-from-schema props options)
(-create-from-gen props schema options)
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8 changes: 7 additions & 1 deletion test/malli/generator_test.cljc
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Original file line number Diff line number Diff line change
Expand Up @@ -236,7 +236,13 @@

(testing "gen/gen"
(is (every? #{1 2} (mg/sample [:and {:gen/gen (gen/elements [1 2])} int?] {:size 1000})))
(is (every? #{"1" "2"} (mg/sample [:and {:gen/gen (gen/elements [1 2]) :gen/fmap str} int?] {:size 1000})))))
(is (every? #{"1" "2"} (mg/sample [:and {:gen/gen (gen/elements [1 2]) :gen/fmap str} int?] {:size 1000}))))
(testing "gen/resolve"
(is (every? #{1 2} (mg/sample [:and {:gen/resolve 'malli.generator-test/resolvable-gen} int?] {:size 1000})))
(is (every? #{"1" "2"} (mg/sample [:and {:gen/resolve 'malli.generator-test/resolvable-gen :gen/fmap str} int?] {:size 1000})))))

(def resolvable-gen
(gen/elements [1 2]))

(defn- schema+coll-gen [type children-gen]
(gen/let [children children-gen]
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