--- /dev/null
+;;; 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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