emacs/test/lisp/emacs-lisp/cl-lib-tests.el

563 lines
22 KiB
EmacsLisp

;;; cl-lib-tests.el --- tests for emacs-lisp/cl-lib.el -*- lexical-binding:t -*-
;; Copyright (C) 2013-2024 Free Software Foundation, Inc.
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Extracted from ert-tests.el, back when ert used to reimplement some
;; cl functions.
;;; Code:
(require 'cl-lib)
(require 'ert)
(ert-deftest cl-lib-test-remprop ()
(let ((x (cl-gensym)))
(should (equal (symbol-plist x) '()))
;; Remove nonexistent property on empty plist.
(cl-remprop x 'b)
(should (equal (symbol-plist x) '()))
(put x 'a 1)
(should (equal (symbol-plist x) '(a 1)))
;; Remove nonexistent property on nonempty plist.
(cl-remprop x 'b)
(should (equal (symbol-plist x) '(a 1)))
(put x 'b 2)
(put x 'c 3)
(put x 'd 4)
(should (equal (symbol-plist x) '(a 1 b 2 c 3 d 4)))
;; Remove property that is neither first nor last.
(cl-remprop x 'c)
(should (equal (symbol-plist x) '(a 1 b 2 d 4)))
;; Remove last property from a plist of length >1.
(cl-remprop x 'd)
(should (equal (symbol-plist x) '(a 1 b 2)))
;; Remove first property from a plist of length >1.
(cl-remprop x 'a)
(should (equal (symbol-plist x) '(b 2)))
;; Remove property when there is only one.
(cl-remprop x 'b)
(should (equal (symbol-plist x) '()))))
(ert-deftest cl-lib-test-remove-if-not ()
(let ((list (list 'a 'b 'c 'd))
(i 0))
(let ((result (cl-remove-if-not (lambda (x)
(should (eql x (nth i list)))
(cl-incf i)
(member i '(2 3)))
list)))
(should (equal i 4))
(should (equal result '(b c)))
(should (equal list '(a b c d)))))
(should (equal '()
(cl-remove-if-not (lambda (_x) (should nil)) '()))))
(ert-deftest cl-lib-test-remove ()
(let ((list (list 'a 'b 'c 'd))
(key-index 0)
(test-index 0))
(let ((result
(cl-remove 'foo list
:key (lambda (x)
(should (eql x (nth key-index list)))
(prog1
(list key-index x)
(cl-incf key-index)))
:test
(lambda (a b)
(should (eql a 'foo))
(should (equal b (list test-index
(nth test-index list))))
(cl-incf test-index)
(member test-index '(2 3))))))
(should (equal key-index 4))
(should (equal test-index 4))
(should (equal result '(a d)))
(should (equal list '(a b c d)))))
(let ((x (cons nil nil))
(y (cons nil nil)))
(should (equal (cl-remove x (list x y))
;; or (list x), since we use `equal' -- the
;; important thing is that only one element got
;; removed, this proves that the default test is
;; `eql', not `equal'
(list y)))))
(ert-deftest cl-lib-test-set-functions ()
(let ((c1 (cons nil nil))
(c2 (cons nil nil))
(sym (make-symbol "a")))
(let ((e '())
(a (list 'a 'b sym nil "" "x" c1 c2))
(b (list c1 'y 'b sym 'x)))
(should (equal (cl-set-difference e e) e))
(should (equal (cl-set-difference a e) a))
(should (equal (cl-set-difference e a) e))
(should (equal (cl-set-difference a a) e))
(should (equal (cl-set-difference b e) b))
(should (equal (cl-set-difference e b) e))
(should (equal (cl-set-difference b b) e))
;; Note: this test (and others) is sensitive to the order of the
;; result, which is not documented.
(should (equal (cl-set-difference a b) (list 'a nil "" "x" c2)))
(should (equal (cl-set-difference b a) (list 'y 'x)))
;; We aren't testing whether this is really using `eq' rather than `eql'.
(should (equal (cl-set-difference e e :test 'eq) e))
(should (equal (cl-set-difference a e :test 'eq) a))
(should (equal (cl-set-difference e a :test 'eq) e))
(should (equal (cl-set-difference a a :test 'eq) e))
(should (equal (cl-set-difference b e :test 'eq) b))
(should (equal (cl-set-difference e b :test 'eq) e))
(should (equal (cl-set-difference b b :test 'eq) e))
(should (equal (cl-set-difference a b :test 'eq) (list 'a nil "" "x" c2)))
(should (equal (cl-set-difference b a :test 'eq) (list 'y 'x)))
(should (equal (cl-union e e) e))
(should (equal (cl-union a e) a))
(should (equal (cl-union e a) a))
(should (equal (cl-union a a) a))
(should (equal (cl-union b e) b))
(should (equal (cl-union e b) b))
(should (equal (cl-union b b) b))
(should (equal (cl-union a b) (list 'x 'y 'a 'b sym nil "" "x" c1 c2)))
(should (equal (cl-union b a) (list 'x 'y 'a 'b sym nil "" "x" c1 c2)))
(should (equal (cl-intersection e e) e))
(should (equal (cl-intersection a e) e))
(should (equal (cl-intersection e a) e))
(should (equal (cl-intersection a a) a))
(should (equal (cl-intersection b e) e))
(should (equal (cl-intersection e b) e))
(should (equal (cl-intersection b b) b))
(should (equal (cl-intersection a b) (list sym 'b c1)))
(should (equal (cl-intersection b a) (list sym 'b c1))))))
(ert-deftest cl-lib-test-gensym ()
;; Since the expansion of `should' calls `cl-gensym' and thus has a
;; side-effect on `cl--gensym-counter', we have to make sure all
;; macros in our test body are expanded before we rebind
;; `cl--gensym-counter' and run the body. Otherwise, the test would
;; fail if run interpreted.
(let ((body (byte-compile
'(lambda ()
(should (equal (symbol-name (cl-gensym)) "G0"))
(should (equal (symbol-name (cl-gensym)) "G1"))
(should (equal (symbol-name (cl-gensym)) "G2"))
(should (equal (symbol-name (cl-gensym "foo")) "foo3"))
(should (equal (symbol-name (cl-gensym "bar")) "bar4"))
(should (equal cl--gensym-counter 5))))))
(let ((cl--gensym-counter 0))
(funcall body))))
(ert-deftest cl-lib-test-coerce-to-vector ()
(let* ((a (vector))
(b (vector 1 a 3))
(c (list))
(d (list b a)))
(should (eql (cl-coerce a 'vector) a))
(should (eql (cl-coerce b 'vector) b))
(should (equal (cl-coerce c 'vector) (vector)))
(should (equal (cl-coerce d 'vector) (vector b a)))))
(ert-deftest cl-lib-test-string-position ()
(should (eql (cl-position ?x "") nil))
(should (eql (cl-position ?a "abc") 0))
(should (eql (cl-position ?b "abc") 1))
(should (eql (cl-position ?c "abc") 2))
(should (eql (cl-position ?d "abc") nil))
(should (eql (cl-position ?A "abc") nil)))
(ert-deftest cl-lib-test-mismatch ()
(should (eql (cl-mismatch "" "") nil))
(should (eql (cl-mismatch "" "a") 0))
(should (eql (cl-mismatch "a" "a") nil))
(should (eql (cl-mismatch "ab" "a") 1))
(should (eql (cl-mismatch "Aa" "aA") 0))
(should (eql (cl-mismatch '(a b c) '(a b d)) 2)))
(ert-deftest cl-lib-keyword-names-versus-values ()
(should (equal
(funcall (cl-function (lambda (&key a b) (list a b)))
:b :a :a 42)
'(42 :a))))
(ert-deftest cl-lib-empty-keyargs ()
(should-error (funcall (cl-function (lambda (&key) 1))
:b 1)))
(cl-defstruct (mystruct
(:constructor cl-lib--con-1 (&aux (abc 1)))
(:constructor cl-lib--con-2 (&optional def) "Constructor docstring."))
"General docstring."
(abc 5 :readonly t) (def nil))
(ert-deftest cl-lib-struct-accessors ()
(let ((x (make-mystruct :abc 1 :def 2)))
(should (eql (cl-struct-slot-value 'mystruct 'abc x) 1))
(should (eql (cl-struct-slot-value 'mystruct 'def x) 2))
(setf (cl-struct-slot-value 'mystruct 'def x) -1)
(should (eql (cl-struct-slot-value 'mystruct 'def x) -1))
(should (eql (cl-struct-slot-offset 'mystruct 'abc) 1))
(should-error (cl-struct-slot-offset 'mystruct 'marypoppins))
(should (pcase (cl-struct-slot-info 'mystruct)
(`((cl-tag-slot) (abc 5 :readonly t)
(def . ,(or 'nil '(nil))))
t)))))
(ert-deftest cl-lib-struct-constructors ()
(should (string-match "\\`Constructor docstring."
(documentation 'cl-lib--con-2 t)))
(should (mystruct-p (cl-lib--con-1)))
(should (mystruct-p (cl-lib--con-2))))
(ert-deftest cl-lib-arglist-performance ()
;; An `&aux' should not cause lambda's arglist to be turned into an &rest
;; that's parsed by hand.
(should (equal () (help-function-arglist 'cl-lib--con-1)))
(should (pcase (help-function-arglist 'cl-lib--con-2)
(`(&optional ,_) t))))
(ert-deftest cl-the ()
(should (eql (cl-the integer 42) 42))
(should-error (cl-the integer "abc"))
(let ((side-effect 0))
(should (= (cl-the integer (cl-incf side-effect)) 1))
(should (= side-effect 1))))
(ert-deftest cl-lib-test-incf ()
(let ((var 0))
(should (= (cl-incf var) 1))
(should (= var 1)))
(let ((alist))
(should (= (cl-incf (alist-get 'a alist 0)) 1))
(should (= (alist-get 'a alist 0) 1))))
(ert-deftest cl-lib-test-decf ()
(let ((var 1))
(should (= (cl-decf var) 0))
(should (= var 0)))
(let ((alist))
(should (= (cl-decf (alist-get 'a alist 0)) -1))
(should (= (alist-get 'a alist 0) -1))))
(ert-deftest cl-lib-test-plusp ()
(should-not (cl-plusp -1.0e+INF))
(should-not (cl-plusp -1.5e2))
(should-not (cl-plusp -3.14))
(should-not (cl-plusp -1))
(should-not (cl-plusp -0.0))
(should-not (cl-plusp 0))
(should-not (cl-plusp 0.0))
(should-not (cl-plusp -0.0e+NaN))
(should-not (cl-plusp 0.0e+NaN))
(should (cl-plusp 1))
(should (cl-plusp 3.14))
(should (cl-plusp 1.5e2))
(should (cl-plusp 1.0e+INF))
(should-error (cl-plusp "42") :type 'wrong-type-argument))
(ert-deftest cl-lib-test-minusp ()
(should (cl-minusp -1.0e+INF))
(should (cl-minusp -1.5e2))
(should (cl-minusp -3.14))
(should (cl-minusp -1))
(should-not (cl-minusp -0.0))
(should-not (cl-minusp 0))
(should-not (cl-minusp 0.0))
(should-not (cl-minusp -0.0e+NaN))
(should-not (cl-minusp 0.0e+NaN))
(should-not (cl-minusp 1))
(should-not (cl-minusp 3.14))
(should-not (cl-minusp 1.5e2))
(should-not (cl-minusp 1.0e+INF))
(should-error (cl-minusp "-42") :type 'wrong-type-argument))
(ert-deftest cl-lib-test-oddp ()
(should (cl-oddp -3))
(should (cl-oddp 3))
(should-not (cl-oddp -2))
(should-not (cl-oddp 0))
(should-not (cl-oddp 2))
(should-error (cl-oddp 3.0e+NaN) :type 'wrong-type-argument)
(should-error (cl-oddp 3.0) :type 'wrong-type-argument)
(should-error (cl-oddp "3") :type 'wrong-type-argument))
(ert-deftest cl-lib-test-evenp ()
(should (cl-evenp -2))
(should (cl-evenp 0))
(should (cl-evenp 2))
(should-not (cl-evenp -3))
(should-not (cl-evenp 3))
(should-error (cl-evenp 2.0e+NaN) :type 'wrong-type-argument)
(should-error (cl-evenp 2.0) :type 'wrong-type-argument)
(should-error (cl-evenp "2") :type 'wrong-type-argument))
(ert-deftest cl-digit-char-p ()
(should (eql 3 (cl-digit-char-p ?3)))
(should (eql 10 (cl-digit-char-p ?a 11)))
(should (eql 10 (cl-digit-char-p ?A 11)))
(should-not (cl-digit-char-p ?a))
(should (eql 32 (cl-digit-char-p ?w 36)))
(should-error (cl-digit-char-p ?a 37) :type 'args-out-of-range)
(should-error (cl-digit-char-p ?a 1) :type 'args-out-of-range))
(ert-deftest cl-lib-test-first ()
(should (null (cl-first '())))
(should (= 4 (cl-first '(4))))
(should (= 4 (cl-first '(4 2))))
(should-error (cl-first "42") :type 'wrong-type-argument))
(ert-deftest cl-lib-test-second ()
(should (null (cl-second '())))
(should (null (cl-second '(4))))
(should (= 2 (cl-second '(1 2))))
(should (= 2 (cl-second '(1 2 3))))
(should-error (cl-second "1 2 3") :type 'wrong-type-argument))
(ert-deftest cl-lib-test-third ()
(should (null (cl-third '())))
(should (null (cl-third '(1 2))))
(should (= 3 (cl-third '(1 2 3))))
(should (= 3 (cl-third '(1 2 3 4))))
(should-error (cl-third "123") :type 'wrong-type-argument))
(ert-deftest cl-lib-test-fourth ()
(should (null (cl-fourth '())))
(should (null (cl-fourth '(1 2 3))))
(should (= 4 (cl-fourth '(1 2 3 4))))
(should (= 4 (cl-fourth '(1 2 3 4 5))))
(should-error (cl-fourth "1234") :type 'wrong-type-argument))
(ert-deftest cl-lib-test-fifth ()
(should (null (cl-fifth '())))
(should (null (cl-fifth '(1 2 3 4))))
(should (= 5 (cl-fifth '(1 2 3 4 5))))
(should (= 5 (cl-fifth '(1 2 3 4 5 6))))
(should-error (cl-fifth "12345") :type 'wrong-type-argument))
(ert-deftest cl-lib-test-sixth ()
(should (null (cl-sixth '())))
(should (null (cl-sixth '(1 2 3 4 5))))
(should (= 6 (cl-sixth '(1 2 3 4 5 6))))
(should (= 6 (cl-sixth '(1 2 3 4 5 6 7))))
(should-error (cl-sixth "123456") :type 'wrong-type-argument))
(ert-deftest cl-lib-test-seventh ()
(should (null (cl-seventh '())))
(should (null (cl-seventh '(1 2 3 4 5 6))))
(should (= 7 (cl-seventh '(1 2 3 4 5 6 7))))
(should (= 7 (cl-seventh '(1 2 3 4 5 6 7 8))))
(should-error (cl-seventh "1234567") :type 'wrong-type-argument))
(ert-deftest cl-lib-test-eighth ()
(should (null (cl-eighth '())))
(should (null (cl-eighth '(1 2 3 4 5 6 7))))
(should (= 8 (cl-eighth '(1 2 3 4 5 6 7 8))))
(should (= 8 (cl-eighth '(1 2 3 4 5 6 7 8 9))))
(should-error (cl-eighth "12345678") :type 'wrong-type-argument))
(ert-deftest cl-lib-test-ninth ()
(should (null (cl-ninth '())))
(should (null (cl-ninth '(1 2 3 4 5 6 7 8))))
(should (= 9 (cl-ninth '(1 2 3 4 5 6 7 8 9))))
(should (= 9 (cl-ninth '(1 2 3 4 5 6 7 8 9 10))))
(should-error (cl-ninth "123456789") :type 'wrong-type-argument))
(ert-deftest cl-lib-test-tenth ()
(should (null (cl-tenth '())))
(should (null (cl-tenth '(1 2 3 4 5 6 7 8 9))))
(should (= 10 (cl-tenth '(1 2 3 4 5 6 7 8 9 10))))
(should (= 10 (cl-tenth '(1 2 3 4 5 6 7 8 9 10 11))))
(should-error (cl-tenth "1234567890") :type 'wrong-type-argument))
(ert-deftest cl-lib-test-endp ()
(should (cl-endp '()))
(should-not (cl-endp '(1)))
(should-error (cl-endp 1) :type 'wrong-type-argument)
(should-error (cl-endp [1]) :type 'wrong-type-argument))
(ert-deftest cl-lib-test-nth-value ()
(let ((vals (cl-values 2 3)))
(should (= (cl-nth-value 0 vals) 2))
(should (= (cl-nth-value 1 vals) 3))
(should (null (cl-nth-value 2 vals)))
(should-error (cl-nth-value 0.0 vals) :type 'wrong-type-argument)))
(ert-deftest cl-lib-nth-value-test-multiple-values ()
"While CL multiple values are an alias to list, these won't work."
:expected-result :failed
(should (equal (cl-nth-value 0 '(2 3)) '(2 3)))
(should (= (cl-nth-value 0 1) 1))
(should (null (cl-nth-value 1 1)))
(should-error (cl-nth-value -1 (cl-values 2 3)) :type 'args-out-of-range)
(should (string= (cl-nth-value 0 "only lists") "only lists")))
(ert-deftest cl-test-ldiff ()
(let ((l '(1 2 3)))
(should (null (cl-ldiff '() '())))
(should (null (cl-ldiff '() l)))
(should (null (cl-ldiff l l)))
(should (equal l (cl-ldiff l '())))
;; must be part of the list
(should (equal l (cl-ldiff l '(2 3))))
(should (equal '(1) (cl-ldiff l (nthcdr 1 l))))
;; should return a copy
(should-not (eq (cl-ldiff l '()) l))))
(ert-deftest cl-lib-adjoin-test ()
(let ((nums '(1 2))
(myfn-p '=))
;; add non-existing item to the front
(should (equal '(3 1 2) (cl-adjoin 3 nums)))
;; just add - don't copy rest
(should (eq nums (cdr (cl-adjoin 3 nums))))
;; add only when not already there
(should (eq nums (cl-adjoin 2 nums)))
(with-suppressed-warnings ((suspicious memql))
(should (equal '(2 1 (2)) (cl-adjoin 2 '(1 (2))))))
;; default test function is eql
(should (equal '(1.0 1 2) (cl-adjoin 1.0 nums)))
;; own :test function - returns true if match
(should (equal '(1.0 1 2) (cl-adjoin 1.0 nums :test nil))) ;defaults to eql
(should (eq nums (cl-adjoin 2 nums :test myfn-p))) ;match
(should (equal '(3 1 2) (cl-adjoin 3 nums :test myfn-p))) ;no match
;; own :test-not function - returns false if match
(should (equal '(1.0 1 2) (cl-adjoin 1.0 nums :test-not nil))) ;defaults to eql
(should (equal '(2 2) (cl-adjoin 2 '(2) :test-not myfn-p))) ; no match
(should (eq nums (cl-adjoin 2 nums :test-not myfn-p))) ; 1 matches
(should (eq nums (cl-adjoin 3 nums :test-not myfn-p))) ; 1 and 2 matches
;; according to CLtL2 passing both :test and :test-not should signal error
;;(should-error (cl-adjoin 3 nums :test 'myfn-p :test-not myfn-p))
;; own :key fn
(should (eq nums (cl-adjoin 3 nums :key (lambda (x) (if (cl-evenp x) (1+ x) x)))))
(should (equal '(3 1 2) (cl-adjoin 3 nums :key (lambda (x) (if (cl-evenp x) (+ 2 x) x)))))
;; convert using :key, then compare with :test
(should (eq nums (cl-adjoin 1 nums :key 'int-to-string :test 'string=)))
(should (equal '(3 1 2) (cl-adjoin 3 nums :key 'int-to-string :test 'string=)))
(should-error (cl-adjoin 3 nums :key 'int-to-string :test myfn-p)
:type 'wrong-type-argument)
;; convert using :key, then compare with :test-not
(should (eq nums (cl-adjoin 3 nums :key 'int-to-string :test-not 'string=)))
(should (equal '(1 1) (cl-adjoin 1 '(1) :key 'int-to-string :test-not 'string=)))
(should-error (cl-adjoin 1 nums :key 'int-to-string :test-not myfn-p)
:type 'wrong-type-argument)))
(ert-deftest cl-parse-integer ()
(should-error (cl-parse-integer "abc"))
(should (null (cl-parse-integer "abc" :junk-allowed t)))
(should (null (cl-parse-integer "" :junk-allowed t)))
(should (= 342391 (cl-parse-integer "0123456789" :radix 8 :junk-allowed t)))
(should-error (cl-parse-integer "0123456789" :radix 8))
(should (= -239 (cl-parse-integer "-efz" :radix 16 :junk-allowed t)))
(should-error (cl-parse-integer "efz" :radix 16))
(should (= 239 (cl-parse-integer "zzef" :radix 16 :start 2)))
(should (= -123 (cl-parse-integer " -123 "))))
(ert-deftest cl-flet-test ()
(should (equal (cl-flet ((f1 (x) x)) (let ((x #'f1)) (funcall x 5))) 5)))
(ert-deftest cl-lib-test-typep ()
(cl-deftype cl-lib-test-type (&optional x) `(member ,x))
;; Make sure we correctly implement the rule that deftype's optional args
;; default to `*' rather than to nil.
(should (cl-typep '* 'cl-lib-test-type))
(should-not (cl-typep 1 'cl-lib-test-type)))
(ert-deftest cl-lib-symbol-macrolet ()
;; bug#26325
(should (equal (cl-flet ((f (x) (+ x 5)))
(let ((x 5))
(f (+ x 6))))
;; Go through `eval', otherwise the macro-expansion
;; error prevents running the whole test suite :-(
(eval '(cl-symbol-macrolet ((f (+ x 6)))
(cl-flet ((f (x) (+ x 5)))
(let ((x 5))
(f f))))
t))))
(defmacro cl-lib-symbol-macrolet-4+5 ()
;; bug#26068
(let* ((sname "x")
(s1 (make-symbol sname))
(s2 (make-symbol sname)))
`(cl-symbol-macrolet ((,s1 4)
(,s2 5))
(+ ,s1 ,s2))))
(ert-deftest cl-lib-symbol-macrolet-2 ()
(should (equal (cl-lib-symbol-macrolet-4+5) (+ 4 5))))
(ert-deftest cl-lib-symbol-macrolet-hide ()
;; bug#26325, bug#26073
(should (equal (let ((y 5))
(cl-symbol-macrolet ((x y))
(list x
(let ((x 6)) (list x y))
(cl-letf ((x 6)) (list x y))
(apply (lambda (x) (+ x 1)) (list 8)))))
'(5 (6 5) (6 6) 9))))
(ert-deftest cl-lib-defstruct-record ()
(cl-defstruct foo x)
(let ((x (make-foo :x 42)))
(should (recordp x))
(should (eq (type-of x) 'foo))
(should (eql (foo-x x) 42))))
(ert-deftest old-struct ()
(cl-defstruct foo x)
(with-suppressed-warnings ((obsolete cl-old-struct-compat-mode))
(let ((x (vector 'cl-struct-foo))
(saved cl-old-struct-compat-mode))
(cl-old-struct-compat-mode -1)
(should (eq (type-of x) 'vector))
(cl-old-struct-compat-mode 1)
(defvar cl-struct-foo)
(let ((cl-struct-foo (cl--struct-get-class 'foo)))
(setf (symbol-function 'cl-struct-foo) :quick-object-witness-check)
(should (eq (type-of x) 'foo))
(should (eq (type-of (vector 'foo)) 'vector)))
(cl-old-struct-compat-mode (if saved 1 -1)))))
(ert-deftest cl-lib-old-struct ()
(with-suppressed-warnings ((obsolete cl-old-struct-compat-mode))
(let ((saved cl-old-struct-compat-mode))
(cl-old-struct-compat-mode -1)
(cl-struct-define 'foo "" 'cl-structure-object nil nil nil
'cl-struct-foo-tags 'cl-struct-foo t)
(should cl-old-struct-compat-mode)
(cl-old-struct-compat-mode (if saved 1 -1)))))
(ert-deftest cl-constantly ()
(should (equal (mapcar (cl-constantly 3) '(a b c d))
'(3 3 3 3))))
;;; cl-lib-tests.el ends here