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#   Copyright (C) 2003, 2004, 2005, 2006, 2008, 2012
#   Rocky Bernstein <rocky@gnu.org>
#
#   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/>.
#
# Common routines and setup for regression testing.
SKIP_TEST_EXITCODE=77

# Some output changes depending on TZ and locale. Set this so we get known
# results
TZ=CUT
# both 'en_US' and 'en_US.utf8' might be defined on some platforms
if locale -a >/dev/null 2>&1 ; then 
  # Note: Solaris 10's shell can't handle $(..) so we use `...`
  LC_TIME=`locale -a | grep 'en_US' | grep -v 'utf8' | grep -v 'iso88591' &2>/dev/null`
fi
[ -z "$LC_TIME" ] && {
  LC_TIME=${LC_TIME:-en_US}
}>/dev/null 2>&1

export TZ LC_TIME

DIFF="/usr/bin/diff"
DIFF_OPTS=" -w --unified"
RM="rm -f"

check_result() {
  RC=$1
  shift
  msg=$1
  shift
  cmdline="$cmd $*"
  if test $RC -ne 0 ; then 
    if test $RC -ne $SKIP_TEST_EXITCODE ; then
      echo "$0: $msg failed."
      if test -n "$cmdline" ; then 
        echo "$0: failed command:"
        echo "	$cmdline"
      fi
      exit $RC
    else 
      echo "-- $0: $msg skipped."
    fi
  else 
    echo "-- $0: $msg ok."
  fi
}

test_common() {

  cmdname="$1"
  cmd="../src/${cmdname}"
  opts="$2"
  outfile="$3"
  rightfile="$4"

  if [ ! -x "${cmd}" ]; then
    echo "-- $0: No ${cmd}"
    return 1
  fi

  cmdline="${cmd}"
  if "${cmd}" --no-header ${opts} >"${outfile}" 2>&1 ; then 
    if test "/usr/bin/diff" != no; then
      if /usr/bin/diff  -w --unified "${outfile}" "${rightfile}" ; then
	rm -f "${outfile}"
	return 0
      else
	return 3
      fi
    else
      echo "$0: No diff(1) or cmp(1) found - cannot test ${cmdname}"
      rm -f "${outfile}"
      return $SKIP_TEST_EXITCODE
    fi
  else
    echo "$0 failed running: ${cmdname} ${opts}"
    return 2
  fi

}

test_cdinfo() {
  test_common cd-info "$@"
}

test_iso_info() {
  test_common iso-info "$@"
}

test_cd_read() {
  test_common cd-read "$@"
}

test_iso_read() {

  # not test_common, as we use an output file not stdout.

  opts="$1"
  outfile="$2"
  rightfile="$3"

  ISO_READ="../src/iso-read"

  if [ ! -x ${ISO_READ} ]; then
    echo "-- $0: No ${ISO_READ}"
    return 1
  fi

  if "${ISO_READ}" ${opts} -o "${outfile}" 2>&1 ; then 
    if test "/usr/bin/diff" != no; then
      if /usr/bin/diff  -w --unified "${outfile}" "${rightfile}" ; then
	rm -f "${outfile}"
	return 0
      else
	return 3
      fi
    else
      echo "$0: No diff(1) or cmp(1) found - cannot test ${ISO_READ}"
      rm -f "${outfile}"
      return 77
    fi
  else
    echo "$0 failed running: ${ISO_READ} ${opts} -o ${outfile}"
    return 2
  fi

}

test_legal_header() {

  cmdname="$1"
  cmd="../src/${cmdname}"
  opts="$2"
  outfile="$3"

  if test "/bin/grep" = no; then
    echo "$0: No grep(1) found - cannot test ${cmd}."
    echo "$0: Legal header test skipped."
    exit $SKIP_TEST_EXITCODE
  fi
  "${cmd}" ${opts} > ${outfile} 2>&1
  while read line; do
    /bin/grep "${line}" ${outfile} >/dev/null 2>&1
    if [ "$?" -ne 0 ] ; then
      echo "$0: Legal header test failed due to missing expected line:"
      echo "  ${line}"
      echo "$0: Failed command:"
      echo "  ${cmd} ${opts}"
      exit 4
    fi
  done < ${srcdir}/check_legal.regex
  rm -f ${outfile}
  echo "-- $0: Legal header of ${cmd} ${opts} ok."

}

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