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gen.cljc
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gen.cljc
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; Copyright (c) Alan Thompson. All rights reserved.
; The use and distribution terms for this software are covered by the Eclipse Public License 1.0
; (http://opensource.org/licenses/eclipse-1.0.php) which can be found in the file epl-v10.html at
; the root of this distribution. By using this software in any fashion, you are agreeing to be
; bound by the terms of this license. You must not remove this notice, or any other, from this
; software.
(ns tupelo.gen
"Tupelo - Clojure With A Spoonful of Honey"
(:refer-clojure :exclude [rand-nth constantly])
#?(:clj
(:require
[clojure.string :as str]
[clojure.test.check :as tc]
[clojure.test.check.clojure-test :as tst]
[clojure.test.check.generators :as tcgen]
[clojure.test.check.properties :as prop]
[tupelo.chars :as char]
)))
; #todo: for test.check v2:
; fmap -> map
; #todo need tests & doc
; #todo
; maybe
; [tupelo.test.check :as ttc]
; [tupelo.test.check.properties :as tprop]
; [tupelo.test.check.generators :as tgen]
; (gen/sample gen/int 20) -> (tgen/sample {:quantity 20} gen/int )
; ^^^ ctx is always optional 1st arg
; gen/sample-seq -> tgen/->lazy-seq
; tc/quick-check -> (ttc/quick-check {:num-tests 100} ...)
#?(:clj (do
(defn txt-join
"Wraps the supplied generator using clojure.string/join."
[xgen]
(tcgen/fmap str/join xgen))
(defn txt-join-space
"Wraps the supplied generator using #(clojure.string/join \\space %)."
[xgen]
(tcgen/fmap #(str/join \space %) xgen))
(defn maybe-vec
"Given a string generator, randomly return either the original string or a vector of its chars."
[gen-arg]
(tcgen/one-of [ (tcgen/fmap vec gen-arg)
(tcgen/fmap identity gen-arg) ] ))
(defn rand-nth
"Returns a generator yielding a random element from the supplied collection.
Equivalent to `gen/elements` "
[coll]
(tcgen/elements coll))
(defn constantly
"Returns a generator which always yields the supplied argument w/o.
Equivalent to `gen/return` "
[arg]
(tcgen/return arg))
(defn vector+
"Return a non-empty vector (1 or more items) selected using the supplied generator."
[gen-arg]
(tcgen/not-empty (tcgen/vector gen-arg)))
; returns exactly 1 char
(def char-whitespace-horiz (rand-nth char/whitespace-horiz))
(def char-whitespace-eol (rand-nth char/whitespace-eol))
(def char-whitespace (rand-nth char/whitespace))
(def char-alpha (rand-nth char/alpha))
(def char-alphanumeric (rand-nth char/alphanumeric))
; #todo char-visible, char-visible-no-dquote, char-visible-no-squote,
; returns a string (len = 0 or more)
(def whitespace-horiz (txt-join (tcgen/vector char-whitespace-horiz)))
(def whitespace-eol (txt-join (tcgen/vector char-whitespace-eol)))
(def whitespace (txt-join (tcgen/vector char-whitespace)))
; returns a string (len = 1 or more)
(def whitespace-horiz+ (txt-join (vector+ char-whitespace-horiz)))
(def whitespace-eol+ (txt-join (vector+ char-whitespace-eol)))
(def whitespace+ (txt-join (vector+ char-whitespace)))
; returns a string (len = 0 or more)
(def word-alpha (txt-join (tcgen/vector char-alpha)))
(def word-alphanumeric (txt-join (tcgen/vector char-alphanumeric)))
(def words-alpha (txt-join-space (tcgen/vector word-alpha)))
(def words-alphanumeric (txt-join-space (tcgen/vector word-alphanumeric)))
; returns a string (len = 1 or more)
(def word-alpha+ (txt-join (vector+ char-alpha)))
(def word-alphanumeric+ (txt-join (vector+ char-alphanumeric)))
(def words-alpha+ (txt-join-space (vector+ word-alpha+)))
(def words-alphanumeric+ (txt-join-space (vector+ word-alphanumeric+)))
(def identifier (tcgen/let [first-char char-alpha
other-chars word-alphanumeric]
(str first-char other-chars)))
(def char-eol
"A single EOL char"
(rand-nth char/whitespace-eol))
(def chars-eol+
"One or more EOL chars."
(vector+ char-eol))
))