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;;; seq-tests.el --- Tests for sequences.el
;; Copyright (C) 2014-2015 Free Software Foundation, Inc.
;; Author: Nicolas Petton <nicolas@petton.fr>
;; Maintainer: emacs-devel@gnu.org
;; 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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Tests for seq.el
;;; Code:
(require 'ert)
(require 'seq)
(defmacro with-test-sequences (spec &rest body)
"Successively bind VAR to a list, vector, and string built from SEQ.
Evaluate BODY for each created sequence.
\(fn (var seq) body)"
(declare (indent 1) (debug ((symbolp form) body)))
(let ((initial-seq (make-symbol "initial-seq")))
`(let ((,initial-seq ,(cadr spec)))
,@(mapcar (lambda (s)
`(let ((,(car spec) (apply (function ,s) ,initial-seq)))
,@body))
'(list vector string)))))
(defun same-contents-p (seq1 seq2)
"Return t if SEQ1 and SEQ2 have the same contents, nil otherwise."
(equal (append seq1 '()) (append seq2 '())))
(defun test-sequences-evenp (integer)
"Return t if INTEGER is even."
(eq (logand integer 1) 0))
(defun test-sequences-oddp (integer)
"Return t if INTEGER is odd."
(not (test-sequences-evenp integer)))
(ert-deftest test-seq-drop ()
(with-test-sequences (seq '(1 2 3 4))
(should (equal (seq-drop seq 0) seq))
(should (equal (seq-drop seq 1) (seq-subseq seq 1)))
(should (equal (seq-drop seq 2) (seq-subseq seq 2)))
(should (seq-empty-p (seq-drop seq 4)))
(should (seq-empty-p (seq-drop seq 10))))
(with-test-sequences (seq '())
(should (seq-empty-p (seq-drop seq 0)))
(should (seq-empty-p (seq-drop seq 1)))))
(ert-deftest test-seq-take ()
(with-test-sequences (seq '(2 3 4 5))
(should (seq-empty-p (seq-take seq 0)))
(should (= (seq-length (seq-take seq 1)) 1))
(should (= (seq-elt (seq-take seq 1) 0) 2))
(should (same-contents-p (seq-take seq 3) '(2 3 4)))
(should (equal (seq-take seq 10) seq))))
(ert-deftest test-seq-drop-while ()
(with-test-sequences (seq '(1 3 2 4))
(should (equal (seq-drop-while #'test-sequences-oddp seq)
(seq-drop seq 2)))
(should (equal (seq-drop-while #'test-sequences-evenp seq)
seq))
(should (seq-empty-p (seq-drop-while #'numberp seq))))
(with-test-sequences (seq '())
(should (seq-empty-p (seq-drop-while #'test-sequences-oddp seq)))))
(ert-deftest test-seq-take-while ()
(with-test-sequences (seq '(1 3 2 4))
(should (equal (seq-take-while #'test-sequences-oddp seq)
(seq-take seq 2)))
(should (seq-empty-p (seq-take-while #'test-sequences-evenp seq)))
(should (equal (seq-take-while #'numberp seq) seq)))
(with-test-sequences (seq '())
(should (seq-empty-p (seq-take-while #'test-sequences-oddp seq)))))
(ert-deftest test-seq-map-indexed ()
(should (equal (seq-map-indexed (lambda (elt i)
(list elt i))
nil)
nil))
(should (equal (seq-map-indexed (lambda (elt i)
(list elt i))
'(a b c d))
'((a 0) (b 1) (c 2) (d 3)))))
(ert-deftest test-seq-filter ()
(with-test-sequences (seq '(6 7 8 9 10))
(should (equal (seq-filter #'test-sequences-evenp seq) '(6 8 10)))
(should (equal (seq-filter #'test-sequences-oddp seq) '(7 9)))
(should (equal (seq-filter (lambda (elt) nil) seq) '())))
(with-test-sequences (seq '())
(should (equal (seq-filter #'test-sequences-evenp seq) '()))))
(ert-deftest test-seq-remove ()
(with-test-sequences (seq '(6 7 8 9 10))
(should (equal (seq-remove #'test-sequences-evenp seq) '(7 9)))
(should (equal (seq-remove #'test-sequences-oddp seq) '(6 8 10)))
(should (same-contents-p (seq-remove (lambda (elt) nil) seq) seq)))
(with-test-sequences (seq '())
(should (equal (seq-remove #'test-sequences-evenp seq) '()))))
(ert-deftest test-seq-count ()
(with-test-sequences (seq '(6 7 8 9 10))
(should (equal (seq-count #'test-sequences-evenp seq) 3))
(should (equal (seq-count #'test-sequences-oddp seq) 2))
(should (equal (seq-count (lambda (elt) nil) seq) 0)))
(with-test-sequences (seq '())
(should (equal (seq-count #'test-sequences-evenp seq) 0))))
(ert-deftest test-seq-reduce ()
(with-test-sequences (seq '(1 2 3 4))
(should (= (seq-reduce #'+ seq 0) 10))
(should (= (seq-reduce #'+ seq 5) 15)))
(with-test-sequences (seq '())
(should (eq (seq-reduce #'+ seq 0) 0))
(should (eq (seq-reduce #'+ seq 7) 7))))
(ert-deftest test-seq-some ()
(with-test-sequences (seq '(4 3 2 1))
(should (seq-some #'test-sequences-evenp seq))
(should (seq-some #'test-sequences-oddp seq))
(should-not (seq-some (lambda (elt) (> elt 10)) seq)))
(with-test-sequences (seq '())
(should-not (seq-some #'test-sequences-oddp seq)))
(should (seq-some #'null '(1 nil 2))))
(ert-deftest test-seq-find ()
(with-test-sequences (seq '(4 3 2 1))
(should (= 4 (seq-find #'test-sequences-evenp seq)))
(should (= 3 (seq-find #'test-sequences-oddp seq)))
(should-not (seq-find (lambda (elt) (> elt 10)) seq)))
(should-not (seq-find #'null '(1 nil 2)))
(should-not (seq-find #'null '(1 nil 2) t))
(should-not (seq-find #'null '(1 2 3)))
(should (seq-find #'null '(1 2 3) 'sentinel)))
(ert-deftest test-seq-contains ()
(with-test-sequences (seq '(3 4 5 6))
(should (seq-contains seq 3))
(should-not (seq-contains seq 7)))
(with-test-sequences (seq '())
(should-not (seq-contains seq 3))
(should-not (seq-contains seq nil))))
(ert-deftest test-seq-every-p ()
(with-test-sequences (seq '(43 54 22 1))
(should (seq-every-p (lambda (elt) t) seq))
(should-not (seq-every-p #'test-sequences-oddp seq))
(should-not (seq-every-p #'test-sequences-evenp seq)))
(with-test-sequences (seq '(42 54 22 2))
(should (seq-every-p #'test-sequences-evenp seq))
(should-not (seq-every-p #'test-sequences-oddp seq)))
(with-test-sequences (seq '())
(should (seq-every-p #'identity seq))
(should (seq-every-p #'test-sequences-evenp seq))))
(ert-deftest test-seq-empty-p ()
(with-test-sequences (seq '(0))
(should-not (seq-empty-p seq)))
(with-test-sequences (seq '(0 1 2))
(should-not (seq-empty-p seq)))
(with-test-sequences (seq '())
(should (seq-empty-p seq))))
(ert-deftest test-seq-sort ()
(should (equal (seq-sort #'< "cbaf") "abcf"))
(should (equal (seq-sort #'< '(2 1 9 4)) '(1 2 4 9)))
(should (equal (seq-sort #'< [2 1 9 4]) [1 2 4 9]))
(should (equal (seq-sort #'< "") "")))
(ert-deftest test-seq-uniq ()
(with-test-sequences (seq '(2 4 6 8 6 4 3))
(should (equal (seq-uniq seq) '(2 4 6 8 3))))
(with-test-sequences (seq '(3 3 3 3 3))
(should (equal (seq-uniq seq) '(3))))
(with-test-sequences (seq '())
(should (equal (seq-uniq seq) '()))))
(ert-deftest test-seq-subseq ()
(with-test-sequences (seq '(2 3 4 5))
(should (equal (seq-subseq seq 0 4) seq))
(should (same-contents-p (seq-subseq seq 2 4) '(4 5)))
(should (same-contents-p (seq-subseq seq 1 3) '(3 4)))
(should (same-contents-p (seq-subseq seq 1 -1) '(3 4))))
(should (vectorp (seq-subseq [2 3 4 5] 2)))
(should (stringp (seq-subseq "foo" 2 3)))
(should (listp (seq-subseq '(2 3 4 4) 2 3)))
(should-error (seq-subseq '(1 2 3) 4))
(should-not (seq-subseq '(1 2 3) 3))
(should (seq-subseq '(1 2 3) -3))
(should-error (seq-subseq '(1 2 3) 1 4))
(should (seq-subseq '(1 2 3) 1 3)))
(ert-deftest test-seq-concatenate ()
(with-test-sequences (seq '(2 4 6))
(should (equal (seq-concatenate 'string seq [8]) (string 2 4 6 8)))
(should (equal (seq-concatenate 'list seq '(8 10)) '(2 4 6 8 10)))
(should (equal (seq-concatenate 'vector seq '(8 10)) [2 4 6 8 10]))
(should (equal (seq-concatenate 'vector nil '(8 10)) [8 10]))
(should (equal (seq-concatenate 'vector seq nil) [2 4 6]))))
(ert-deftest test-seq-mapcat ()
(should (equal (seq-mapcat #'seq-reverse '((3 2 1) (6 5 4)))
'(1 2 3 4 5 6)))
(should (equal (seq-mapcat #'seq-reverse '[(3 2 1) (6 5 4)])
'(1 2 3 4 5 6)))
(should (equal (seq-mapcat #'seq-reverse '((3 2 1) (6 5 4)) 'vector)
'[1 2 3 4 5 6])))
(ert-deftest test-seq-partition ()
(should (same-contents-p (seq-partition '(0 1 2 3 4 5 6 7) 3)
'((0 1 2) (3 4 5) (6 7))))
(should (same-contents-p (seq-partition '[0 1 2 3 4 5 6 7] 3)
'([0 1 2] [3 4 5] [6 7])))
(should (same-contents-p (seq-partition "Hello world" 2)
'("He" "ll" "o " "wo" "rl" "d")))
(should (equal (seq-partition '() 2) '()))
(should (equal (seq-partition '(1 2 3) -1) '())))
(ert-deftest test-seq-group-by ()
(with-test-sequences (seq '(1 2 3 4))
(should (equal (seq-group-by #'test-sequences-oddp seq)
'((t 1 3) (nil 2 4)))))
(should (equal (seq-group-by #'car '((a 1) (b 3) (c 4) (a 2)))
'((b (b 3)) (c (c 4)) (a (a 1) (a 2))))))
(ert-deftest test-seq-reverse ()
(with-test-sequences (seq '(1 2 3 4))
(should (same-contents-p (seq-reverse seq) '(4 3 2 1)))
(should (equal (type-of (seq-reverse seq))
(type-of seq)))))
(ert-deftest test-seq-into ()
(let* ((vector [1 2 3])
(list (seq-into vector 'list)))
(should (same-contents-p vector list))
(should (listp list)))
(let* ((list '(hello world))
(vector (seq-into list 'vector)))
(should (same-contents-p vector list))
(should (vectorp vector)))
(let* ((string "hello")
(list (seq-into string 'list)))
(should (same-contents-p string list))
(should (stringp string)))
(let* ((string "hello")
(vector (seq-into string 'vector)))
(should (same-contents-p string vector))
(should (stringp string)))
(let* ((list nil)
(vector (seq-into list 'vector)))
(should (same-contents-p list vector))
(should (vectorp vector))))
(ert-deftest test-seq-intersection ()
(let ((v1 [2 3 4 5])
(v2 [1 3 5 6 7]))
(should (same-contents-p (seq-intersection v1 v2)
'(3 5))))
(let ((l1 '(2 3 4 5))
(l2 '(1 3 5 6 7)))
(should (same-contents-p (seq-intersection l1 l2)
'(3 5))))
(let ((v1 [2 4 6])
(v2 [1 3 5]))
(should (seq-empty-p (seq-intersection v1 v2)))))
(ert-deftest test-seq-difference ()
(let ((v1 [2 3 4 5])
(v2 [1 3 5 6 7]))
(should (same-contents-p (seq-difference v1 v2)
'(2 4))))
(let ((l1 '(2 3 4 5))
(l2 '(1 3 5 6 7)))
(should (same-contents-p (seq-difference l1 l2)
'(2 4))))
(let ((v1 [2 4 6])
(v2 [2 4 6]))
(should (seq-empty-p (seq-difference v1 v2)))))
(ert-deftest test-seq-let ()
(with-test-sequences (seq '(1 2 3 4))
(seq-let (a b c d e) seq
(should (= a 1))
(should (= b 2))
(should (= c 3))
(should (= d 4))
(should (null e)))
(seq-let (a b &rest others) seq
(should (= a 1))
(should (= b 2))
(should (same-contents-p others (seq-drop seq 2)))))
(let ((seq '(1 (2 (3 (4))))))
(seq-let (_ (_ (_ (a)))) seq
(should (= a 4))))
(let (seq)
(seq-let (a b c) seq
(should (null a))
(should (null b))
(should (null c)))))
(ert-deftest test-seq-min-max ()
(with-test-sequences (seq '(4 5 3 2 0 4))
(should (= (seq-min seq) 0))
(should (= (seq-max seq) 5))))
(ert-deftest test-seq-position ()
(with-test-sequences (seq '(2 4 6))
(should (null (seq-position seq 1)))
(should (= (seq-position seq 4) 1)))
(let ((seq '(a b c)))
(should (null (seq-position seq 'd #'eq)))
(should (= (seq-position seq 'a #'eq) 0))
(should (null (seq-position seq (make-symbol "a") #'eq)))))
(ert-deftest test-seq-mapn ()
(should-error (seq-mapn #'identity))
(with-test-sequences (seq '(1 2 3 4 5 6 7))
(should (equal (append seq nil)
(seq-mapn #'identity seq)))
(should (equal (seq-mapn #'1+ seq)
(seq-map #'1+ seq)))
(with-test-sequences (seq-2 '(10 20 30 40 50))
(should (equal (seq-mapn #'+ seq seq-2)
'(11 22 33 44 55)))
(should (equal (seq-mapn #'+ seq seq-2 nil) nil)))))
(ert-deftest test-seq-sort-by ()
(let ((seq ["x" "xx" "xxx"]))
(should (equal (seq-sort-by #'seq-length #'> seq)
["xxx" "xx" "x"]))))
(ert-deftest test-seq-random-elt-take-all ()
(let ((seq '(a b c d e))
(elts '()))
(should (= 0 (length elts)))
(dotimes (_ 1000)
(let ((random-elt (seq-random-elt seq)))
(add-to-list 'elts
random-elt)))
(should (= 5 (length elts)))))
(ert-deftest test-seq-random-elt-signal-on-empty ()
(should-error (seq-random-elt nil))
(should-error (seq-random-elt []))
(should-error (seq-random-elt "")))
(ert-deftest test-seq-mapn-circular-lists ()
(let ((l1 '#1=(1 . #1#)))
(should (equal (seq-mapn #'+ '(3 4 5 7) l1)
'(4 5 6 8)))))
(ert-deftest test-seq-into-and-identity ()
(let ((lst '(1 2 3))
(vec [1 2 3])
(str "foo bar"))
(should (eq (seq-into lst 'list) lst))
(should (eq (seq-into vec 'vector) vec))
(should (eq (seq-into str 'string) str))))
(provide 'seq-tests)
;;; seq-tests.el ends here
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