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Diffstat (limited to 'test/src/timefns-tests.el')
| -rw-r--r-- | test/src/timefns-tests.el | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/test/src/timefns-tests.el b/test/src/timefns-tests.el new file mode 100644 index 00000000000..ebeb43de163 --- /dev/null +++ b/test/src/timefns-tests.el @@ -0,0 +1,144 @@ +;;; timefns-tests.el -- tests for timefns.c + +;; Copyright (C) 2016-2018 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 <https://www.gnu.org/licenses/>. + +(require 'ert) + +;;; Check format-time-string and decode-time with various TZ settings. +;;; Use only POSIX-compatible TZ values, since the tests should work +;;; even if tzdb is not in use. +(ert-deftest format-time-string-with-zone () + ;; Don’t use (0 0 0 0) as the test case, as there are too many bugs + ;; in MS-Windows (and presumably other) C libraries when formatting + ;; time stamps near the Epoch of 1970-01-01 00:00:00 UTC, and this + ;; test is for GNU Emacs, not for C runtimes. Instead, look before + ;; you leap: "look" is the timestamp just before the first leap + ;; second on 1972-06-30 23:59:60 UTC, so it should format to the + ;; same string regardless of whether the underlying C library + ;; ignores leap seconds, while avoiding circa-1970 glitches. + ;; + ;; Similarly, stick to the limited set of time zones that are + ;; supported by both POSIX and MS-Windows: exactly 3 ASCII letters + ;; in the abbreviation, and no DST. + (let ((format "%Y-%m-%d %H:%M:%S.%3N %z (%Z)")) + (dolist (look '((1202 22527 999999 999999) + (7879679999900 . 100000) + (78796799999999999999 . 1000000000000))) + ;; UTC. + (should (string-equal + (format-time-string "%Y-%m-%d %H:%M:%S.%3N %z" look t) + "1972-06-30 23:59:59.999 +0000")) + (should (equal (decode-time look t) + '(59 59 23 30 6 1972 5 nil 0))) + ;; "UTC0". + (should (string-equal + (format-time-string format look "UTC0") + "1972-06-30 23:59:59.999 +0000 (UTC)")) + (should (equal (decode-time look "UTC0") + '(59 59 23 30 6 1972 5 nil 0))) + ;; Negative UTC offset, as a Lisp list. + (should (string-equal + (format-time-string format look '(-28800 "PST")) + "1972-06-30 15:59:59.999 -0800 (PST)")) + (should (equal (decode-time look '(-28800 "PST")) + '(59 59 15 30 6 1972 5 nil -28800))) + ;; Negative UTC offset, as a Lisp integer. + (should (string-equal + (format-time-string format look -28800) + ;; MS-Windows build replaces unrecognizable TZ values, + ;; such as "-08", with "ZZZ". + (if (eq system-type 'windows-nt) + "1972-06-30 15:59:59.999 -0800 (ZZZ)" + "1972-06-30 15:59:59.999 -0800 (-08)"))) + (should (equal (decode-time look -28800) + '(59 59 15 30 6 1972 5 nil -28800))) + ;; Positive UTC offset that is not an hour multiple, as a string. + (should (string-equal + (format-time-string format look "IST-5:30") + "1972-07-01 05:29:59.999 +0530 (IST)")) + (should (equal (decode-time look "IST-5:30") + '(59 29 5 1 7 1972 6 nil 19800)))))) + +(ert-deftest decode-then-encode-time () + (let ((time-values (list 0 -2 1 0.0 -0.0 -2.0 1.0 + most-negative-fixnum most-positive-fixnum + (1- most-negative-fixnum) + (1+ most-positive-fixnum) + 1e+INF -1e+INF 1e+NaN -1e+NaN + '(0 1 0 0) '(1 0 0 0) '(-1 0 0 0) + '(123456789000000 . 1000000) + (cons (1+ most-positive-fixnum) 1000000000000) + (cons 1000000000000 (1+ most-positive-fixnum))))) + (dolist (a time-values) + (let* ((d (ignore-errors (decode-time a t))) + (e (encode-time d)) + (diff (float-time (time-subtract a e)))) + (should (or (not d) + (and (<= 0 diff) (< diff 1)))))))) + +;;; This should not dump core. +(ert-deftest format-time-string-with-outlandish-zone () + (should (stringp + (format-time-string "%Y-%m-%d %H:%M:%S.%3N %z" nil + (concat (make-string 2048 ?X) "0"))))) + +(defun timefns-tests--have-leap-seconds () + (string-equal (format-time-string "%Y-%m-%d %H:%M:%S" 78796800 t) + "1972-06-30 23:59:60")) + +(ert-deftest format-time-string-with-bignum-on-32-bit () + (should (or (string-equal + (format-time-string "%Y-%m-%d %H:%M:%S" (- (ash 1 31) 3600) t) + "2038-01-19 02:14:08") + (timefns-tests--have-leap-seconds)))) + +(ert-deftest time-equal-p-nil-nil () + (should (time-equal-p nil nil))) + +(ert-deftest time-arith-tests () + (let ((time-values (list 0 -1 1 0.0 -0.0 -1.0 1.0 + most-negative-fixnum most-positive-fixnum + (1- most-negative-fixnum) + (1+ most-positive-fixnum) + 1e+INF -1e+INF 1e+NaN -1e+NaN + '(0 0 0 1) '(0 0 1 0) '(0 1 0 0) '(1 0 0 0) + '(-1 0 0 0) '(1 2 3 4) '(-1 2 3 4) + '(-123456789 . 100000) '(123456789 . 1000000) + (cons (1+ most-positive-fixnum) 1000000000000) + (cons 1000000000000 (1+ most-positive-fixnum))))) + (dolist (a time-values) + (dolist (b time-values) + (let ((aa (time-subtract (time-add a b) b))) + (should (or (time-equal-p a aa) (and (floatp aa) (isnan aa))))) + (should (= 1 (+ (if (time-less-p a b) 1 0) + (if (time-equal-p a b) 1 0) + (if (time-less-p b a) 1 0) + (if (or (and (floatp a) (isnan a)) + (and (floatp b) (isnan b))) + 1 0)))) + (should (or (not (time-less-p 0 b)) + (time-less-p a (time-add a b)) + (time-equal-p a (time-add a b)) + (and (floatp (time-add a b)) (isnan (time-add a b))))) + (let ((x (float-time (time-add a b))) + (y (+ (float-time a) (float-time b)))) + (should (or (and (isnan x) (isnan y)) + (= x y) + (< 0.99 (/ x y) 1.01) + (< 0.99 (/ (- (float-time a)) (float-time b)) + 1.01)))))))) |