35 lines
1.1 KiB
Clojure
35 lines
1.1 KiB
Clojure
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(ns clojure.data.generators-test
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(:require [clojure.data.generators :as gen]
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[clojure.test :refer (deftest is)]))
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(defn print-read-roundtrip
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[o]
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(binding [*print-length* nil
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*print-level* nil]
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(-> o pr-str read-string)))
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(defn check-print-read-roundtrip
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[o]
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(let [o2 (print-read-roundtrip o)]
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(when-not (= o o2)
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(throw (ex-info "Value cannot roundtrip, see ex-data" {:value o :roundtrip o2})))))
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(deftest test-print-read-roundtrip
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(dotimes [_ 50]
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(check-print-read-roundtrip (gen/anything))))
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(deftest test-shuffle
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(dotimes [_ 50]
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(let [coll (gen/vec gen/anything)
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shuf (gen/shuffle coll)]
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(is (= (into #{} coll)
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(into #{} shuf))))))
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(deftest test-reservoir-sample-consistency
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(dotimes [n 50]
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(let [coll (range 100)
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sample-1 (binding [gen/*rnd* (java.util.Random. n)]
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(gen/reservoir-sample 10 coll))
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sample-2 (binding [gen/*rnd* (java.util.Random. n)]
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(gen/reservoir-sample 10 coll))]
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(is (= sample-1 sample-2)))))
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