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#! /bin/sh
# Copyright (C) 1999-2017 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 program.  If not, see <https://www.gnu.org/licenses/>.

# Test to make sure mdate-sh works correctly.

am_create_testdir=empty
. test-init.sh

get_shell_script mdate-sh

year=$(date +%Y) && test $year -gt 2010 || year=NONE

do_checks ()
{
  set x $(./mdate-sh mdate-sh)
  shift
  echo "$*" # For debugging.

  # Check that mdate output looks like a date.
  test $# = 3 || exit 1
  case $1$3 in *[!0-9]*) exit 1;; esac
  test $1 -lt 32 || exit 1
  # Hopefully automake will be obsolete in 80 years ;-)
  case $3 in 20[0-9][0-9]) :;; *) exit 1;; esac
  case $2 in
    January|February|March|April|May|June|July|August) ;;
    September|October|November|December) ;;
    *) exit 1
  esac

  # Stricter checks on the year require a POSIX date(1) command.
  test $year = NONE || test $year = $3 || exit 1
}

TIME_STYLE=; unset TIME_STYLE
do_checks

# This setting, when honored by GNU ls, used to cause an infinite
# loop in mdate-sh.
TIME_STYLE="+%Y-%m-%d %H:%M:%S"; export TIME_STYLE
do_checks

: