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;;; fns-tests.el --- tests for src/fns.c
;; Copyright (C) 2014-2016 Free Software Foundation, Inc.
;; This file is part of GNU Emacs.
;; This program 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.
;;
;; This program 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 this program. If not, see `http://www.gnu.org/licenses/'.
;;; Commentary:
;;; Code:
(require 'cl-lib)
(eval-when-compile (require 'cl))
(ert-deftest fns-tests-reverse ()
(should-error (reverse))
(should-error (reverse 1))
(should-error (reverse (make-char-table 'foo)))
(should (equal [] (reverse [])))
(should (equal [0] (reverse [0])))
(should (equal [1 2 3 4] (reverse (reverse [1 2 3 4]))))
(should (equal '(a b c d) (reverse (reverse '(a b c d)))))
(should (equal "xyzzy" (reverse (reverse "xyzzy"))))
(should (equal "こんにちは / ｺﾝﾆﾁﾊ" (reverse (reverse "こんにちは / ｺﾝﾆﾁﾊ")))))
(ert-deftest fns-tests-nreverse ()
(should-error (nreverse))
(should-error (nreverse 1))
(should-error (nreverse (make-char-table 'foo)))
(should (equal (nreverse "xyzzy") "yzzyx"))
(let ((A []))
(nreverse A)
(should (equal A [])))
(let ((A [0]))
(nreverse A)
(should (equal A [0])))
(let ((A [1 2 3 4]))
(nreverse A)
(should (equal A [4 3 2 1])))
(let ((A [1 2 3 4]))
(nreverse A)
(nreverse A)
(should (equal A [1 2 3 4])))
(let* ((A [1 2 3 4])
(B (nreverse (nreverse A))))
(should (equal A B))))
(ert-deftest fns-tests-reverse-bool-vector ()
(let ((A (make-bool-vector 10 nil)))
(dotimes (i 5) (aset A i t))
(should (equal [nil nil nil nil nil t t t t t] (vconcat (reverse A))))
(should (equal A (reverse (reverse A))))))
(ert-deftest fns-tests-nreverse-bool-vector ()
(let ((A (make-bool-vector 10 nil)))
(dotimes (i 5) (aset A i t))
(nreverse A)
(should (equal [nil nil nil nil nil t t t t t] (vconcat A)))
(should (equal [t t t t t nil nil nil nil nil] (vconcat (nreverse A))))))
(ert-deftest fns-tests-compare-strings ()
(should-error (compare-strings))
(should-error (compare-strings "xyzzy" "xyzzy"))
(should (= (compare-strings "xyzzy" 0 10 "zyxxy" 0 5) -1))
(should-error (compare-strings "xyzzy" 0 5 "zyxxy" -1 2))
(should-error (compare-strings "xyzzy" 'foo nil "zyxxy" 0 1))
(should-error (compare-strings "xyzzy" 0 'foo "zyxxy" 2 3))
(should-error (compare-strings "xyzzy" 0 2 "zyxxy" 'foo 3))
(should-error (compare-strings "xyzzy" nil 3 "zyxxy" 4 'foo))
(should (eq (compare-strings "" nil nil "" nil nil) t))
(should (eq (compare-strings "" 0 0 "" 0 0) t))
(should (eq (compare-strings "test" nil nil "test" nil nil) t))
(should (eq (compare-strings "test" nil nil "test" nil nil t) t))
(should (eq (compare-strings "test" nil nil "test" nil nil nil) t))
(should (eq (compare-strings "Test" nil nil "test" nil nil t) t))
(should (= (compare-strings "Test" nil nil "test" nil nil) -1))
(should (= (compare-strings "Test" nil nil "test" nil nil) -1))
(should (= (compare-strings "test" nil nil "Test" nil nil) 1))
(should (= (compare-strings "foobaz" nil nil "barbaz" nil nil) 1))
(should (= (compare-strings "barbaz" nil nil "foobar" nil nil) -1))
(should (= (compare-strings "foobaz" nil nil "farbaz" nil nil) 2))
(should (= (compare-strings "farbaz" nil nil "foobar" nil nil) -2))
(should (eq (compare-strings "abcxyz" 0 2 "abcprq" 0 2) t))
(should (eq (compare-strings "abcxyz" 0 -3 "abcprq" 0 -3) t))
(should (= (compare-strings "abcxyz" 0 6 "abcprq" 0 6) 4))
(should (= (compare-strings "abcprq" 0 6 "abcxyz" 0 6) -4))
(should (eq (compare-strings "xyzzy" -3 4 "azza" -3 3) t))
(should (eq (compare-strings "こんにちはｺﾝﾆﾁﾊ" nil nil "こんにちはｺﾝﾆﾁﾊ" nil nil) t))
(should (= (compare-strings "んにちはｺﾝﾆﾁﾊこ" nil nil "こんにちはｺﾝﾆﾁﾊ" nil nil) 1))
(should (= (compare-strings "こんにちはｺﾝﾆﾁﾊ" nil nil "んにちはｺﾝﾆﾁﾊこ" nil nil) -1)))
(defun fns-tests--collate-enabled-p ()
"Check whether collation functions are enabled."
(and
;; When there is no collation library, collation functions fall back
;; to their lexicographic counterparts. We don't need to test then.
(not (ignore-errors (string-collate-equalp "" "" t)))
;; We use a locale, which might not be installed. Check it.
(ignore-errors
(string-collate-equalp
"" "" (if (eq system-type 'windows-nt) "enu_USA" "en_US.UTF-8")))))
(ert-deftest fns-tests-collate-strings ()
(skip-unless (fns-tests--collate-enabled-p))
(should (string-collate-equalp "xyzzy" "xyzzy"))
(should-not (string-collate-equalp "xyzzy" "XYZZY"))
;; In POSIX or C locales, collation order is lexicographic.
(should (string-collate-lessp "XYZZY" "xyzzy" "POSIX"))
;; In a language specific locale, collation order is different.
(should (string-collate-lessp
"xyzzy" "XYZZY"
(if (eq system-type 'windows-nt) "enu_USA" "en_US.UTF-8")))
;; Ignore case.
(should (string-collate-equalp "xyzzy" "XYZZY" nil t))
;; Locale must be valid.
(should-error (string-collate-equalp "xyzzy" "xyzzy" "en_DE.UTF-8")))
;; There must be a check for valid codepoints. (Check not implemented yet)
; (should-error
; (string-collate-equalp (string ?\x00110000) (string ?\x00110000)))
;; Invalid UTF-8 sequences shall be indicated. How to create such strings?
(ert-deftest fns-tests-sort ()
(should (equal (sort '(9 5 2 -1 5 3 8 7 4) (lambda (x y) (< x y)))
'(-1 2 3 4 5 5 7 8 9)))
(should (equal (sort '(9 5 2 -1 5 3 8 7 4) (lambda (x y) (> x y)))
'(9 8 7 5 5 4 3 2 -1)))
(should (equal (sort '[9 5 2 -1 5 3 8 7 4] (lambda (x y) (< x y)))
[-1 2 3 4 5 5 7 8 9]))
(should (equal (sort '[9 5 2 -1 5 3 8 7 4] (lambda (x y) (> x y)))
[9 8 7 5 5 4 3 2 -1]))
(should (equal
(sort
(vector
'(8 . "xxx") '(9 . "aaa") '(8 . "bbb") '(9 . "zzz")
'(9 . "ppp") '(8 . "ttt") '(8 . "eee") '(9 . "fff"))
(lambda (x y) (< (car x) (car y))))
[(8 . "xxx") (8 . "bbb") (8 . "ttt") (8 . "eee")
(9 . "aaa") (9 . "zzz") (9 . "ppp") (9 . "fff")])))
(ert-deftest fns-tests-collate-sort ()
;; See https://lists.gnu.org/archive/html/emacs-devel/2015-10/msg02505.html.
:expected-result (if (eq system-type 'cygwin) :failed :passed)
(skip-unless (fns-tests--collate-enabled-p))
;; Punctuation and whitespace characters are relevant for POSIX.
(should
(equal
(sort '("11" "12" "1 1" "1 2" "1.1" "1.2")
(lambda (a b) (string-collate-lessp a b "POSIX")))
'("1 1" "1 2" "1.1" "1.2" "11" "12")))
;; Punctuation and whitespace characters are not taken into account
;; for collation in other locales.
(should
(equal
(sort '("11" "12" "1 1" "1 2" "1.1" "1.2")
(lambda (a b)
(let ((w32-collate-ignore-punctuation t))
(string-collate-lessp
a b (if (eq system-type 'windows-nt) "enu_USA" "en_US.UTF-8")))))
'("11" "1 1" "1.1" "12" "1 2" "1.2")))
;; Diacritics are different letters for POSIX, they sort lexicographical.
(should
(equal
(sort '("Ævar" "Agustín" "Adrian" "Eli")
(lambda (a b) (string-collate-lessp a b "POSIX")))
'("Adrian" "Agustín" "Eli" "Ævar")))
;; Diacritics are sorted between similar letters for other locales.
(should
(equal
(sort '("Ævar" "Agustín" "Adrian" "Eli")
(lambda (a b)
(let ((w32-collate-ignore-punctuation t))
(string-collate-lessp
a b (if (eq system-type 'windows-nt) "enu_USA" "en_US.UTF-8")))))
'("Adrian" "Ævar" "Agustín" "Eli"))))
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