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sritchie/assoc.clj

Created November 7, 2013 02:36
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assoc.clj
(defn monoid-laws [zero g f]
(testing "+ and 0 form a monoid"
(is (let [p (prop/for-all [a g, b g, c g]
(and (= (f zero a) a)
(= (f a zero) a)
(= (f a (f b c)) (f (f a b) c))))]
(:result (sc/quick-check 1000 p))))))
(deftest int-monoid-laws
(monoid-laws 0 gen/int +))
(deftest ratio-monoid-laws
(monoid-laws 0 gen/ratio +))
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