merge from 1.8 branch

[bpt/guile.git] / test-suite / tests / time.test

;;;; time.test --- test suite for Guile's time functions     -*- scheme -*-
;;;; Jim Blandy <jimb@red-bean.com> --- June 1999, 2004
;;;;
;;;; 	Copyright (C) 1999, 2004, 2006 Free Software Foundation, Inc.
;;;; 
;;;; 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 2, 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 software; see the file COPYING.  If not, write to
;;;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;;;; Boston, MA 02110-1301 USA

(define-module (test-suite test-time)
  #:use-module (test-suite lib)
  #:use-module (ice-9 threads))

;;;
;;; gmtime
;;;

(with-test-prefix "gmtime"

  (for-each (lambda (t)
	      (pass-if (list "in another thread after error" t)
		(or (provided? 'threads) (throw 'unsupported))

		;; actually this test is perfectly good, but the "internal
		;; define - missing body expression" in syntax.test somehow
		;; ends up leaving SCM_DEFER_INTS, making the test here hang
		;;
		(throw 'unresolved)

		(alarm 5)
		(false-if-exception (gmtime t))
		(thread-join (begin-thread (catch 'out-of-range
						  (lambda () (gmtime t))
						  (lambda args #f))))
		(alarm 0)
		#t))

	    ;; time values that might provoke an error from libc
	    ;; on 32-bit glibc all values (which fit) are fine
	    ;; on 64-bit glibc apparently 2^63 can overflow a 32-bit tm_year
	    (list (1- (ash 1 31)) (1- (ash 1 63))
		  -1 (- (ash 1 31)) (- (ash 1 63)))))

;;;
;;; internal-time-units-per-second
;;;

(with-test-prefix "internal-time-units-per-second"

  ;; Check that sleep 1 gives about internal-time-units-per-second worth of
  ;; elapsed time from times:clock.  This mainly ensures
  ;; internal-time-units-per-second correctly indicates CLK_TCK units.
  ;;
  (pass-if "versus times and sleep"
    (or (defined? 'times) (throw 'unsupported))
    
    (let ((old (times)))
      (sleep 1)
      (let* ((new (times))
	     (elapsed (- (tms:clock new) (tms:clock old))))
	(<= (* 0.5 internal-time-units-per-second)
	    elapsed
	    (* 2 internal-time-units-per-second))))))

;;;
;;; strftime
;;;

;; Note we must force isdst to get the ZOW zone name out of %Z on HP-UX.
;; If localtime is in daylight savings then it will decide there's no
;; daylight savings zone name for the fake ZOW, and come back empty.
;;
;; This test is disabled because on NetBSD %Z doesn't look at the tm_zone
;; field in struct tm passed by guile.  That behaviour is reasonable enough
;; since that field is not in C99 so a C99 program won't know it has to be
;; set.  For the details on that see
;;
;;     http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=21722
;;
;; Not sure what to do about this in guile, it'd be nice for %Z to look at
;; tm:zone everywhere.
;;
;;
;; (pass-if "strftime %Z doesn't return garbage"
;; 	 (let ((t (localtime (current-time))))
;; 	   (set-tm:zone t "ZOW")
;; 	   (set-tm:isdst t 0)
;; 	   (string=? (strftime "%Z" t)
;; 		     "ZOW")))

;;;
;;; strptime
;;;

(with-test-prefix "strptime"

  (pass-if "in another thread after error"
    (or (defined? 'strptime) (throw 'unsupported))
    (or (provided? 'threads) (throw 'unsupported))

    ;; actually this test is perfectly good, but the "internal define -
    ;; missing body expression" in syntax.test somehow ends up leaving
    ;; SCM_DEFER_INTS, making the test here hang
    ;;
    (throw 'unresolved)

    (alarm 5)
    (false-if-exception
     (strptime "%a" "nosuchday"))
    (thread-join (begin-thread (strptime "%d" "1")))
    (alarm 0)
    #t))