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;;; rx-tests.el --- test for rx.el functions -*- lexical-binding: t -*-
;; Copyright (C) 2016-2019 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:
(require 'ert)
(require 'rx)
;;; Code:
(ert-deftest rx-char-any ()
"Test character alternatives with `]' and `-' (Bug#25123)."
(should (string-match
(rx string-start (1+ (char (?\] . ?\{) (?< . ?\]) (?- . ?:)))
string-end)
(apply #'string (nconc (number-sequence ?\] ?\{)
(number-sequence ?< ?\])
(number-sequence ?- ?:))))))
(ert-deftest rx-char-any-range-nl ()
"Test character alternatives with LF as a range endpoint."
(should (equal (rx (any "\n-\r"))
"[\n-\r]"))
(should (equal (rx (any "\a-\n"))
"[\a-\n]")))
(ert-deftest rx-char-any-raw-byte ()
"Test raw bytes in character alternatives."
;; Separate raw characters.
(should (equal (string-match-p (rx (any "\326A\333B"))
"X\326\333")
1))
;; Range of raw characters, unibyte.
(should (equal (string-match-p (rx (any "\200-\377"))
"ÿA\310B")
2))
;; Range of raw characters, multibyte.
(should (equal (string-match-p (rx (any "Å\211\326-\377\177"))
"XY\355\177\327")
2))
;; Split range; \177-\377ÿ should not be optimised to \177-\377.
(should (equal (string-match-p (rx (any "\177-\377" ?ÿ))
"ÿA\310B")
0)))
(ert-deftest rx-pcase ()
(should (equal (pcase "a 1 2 3 1 1 b"
((rx (let u (+ digit)) space
(let v (+ digit)) space
(let v (+ digit)) space
(backref u) space
(backref 1))
(list u v)))
'("1" "3"))))
(ert-deftest rx-kleene ()
"Test greedy and non-greedy repetition operators."
(should (equal (rx (* "a") (+ "b") (\? "c") (?\s "d")
(*? "e") (+? "f") (\?? "g") (?? "h"))
"a*b+c?d?e*?f+?g??h??"))
(should (equal (rx (zero-or-more "a") (0+ "b")
(one-or-more "c") (1+ "d")
(zero-or-one "e") (optional "f") (opt "g"))
"a*b*c+d+e?f?g?"))
(should (equal (rx (minimal-match
(seq (* "a") (+ "b") (\? "c") (?\s "d")
(*? "e") (+? "f") (\?? "g") (?? "h"))))
"a*b+c?d?e*?f+?g??h??"))
(should (equal (rx (minimal-match
(seq (zero-or-more "a") (0+ "b")
(one-or-more "c") (1+ "d")
(zero-or-one "e") (optional "f") (opt "g"))))
"a*?b*?c+?d+?e??f??g??"))
(should (equal (rx (maximal-match
(seq (* "a") (+ "b") (\? "c") (?\s "d")
(*? "e") (+? "f") (\?? "g") (?? "h"))))
"a*b+c?d?e*?f+?g??h??")))
(ert-deftest rx-or ()
;; Test or-pattern reordering (Bug#34641).
(let ((s "abc"))
(should (equal (and (string-match (rx (or "abc" "ab" "a")) s)
(match-string 0 s))
"abc"))
(should (equal (and (string-match (rx (or "ab" "abc" "a")) s)
(match-string 0 s))
"ab"))
(should (equal (and (string-match (rx (or "a" "ab" "abc")) s)
(match-string 0 s))
"a"))))
(provide 'rx-tests)
;; rx-tests.el ends here.
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