#!/bin/sh

# Unit tests for init.sh

# Copyright (C) 2011-2020 Free Software Foundation, Inc.

# This file is part of the GNUlib Library.

#

# 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/>.  */

: ${srcdir=.}

. "$srcdir/init.sh"; path_prepend_ .

fail=0

test_compare()

{

  touch empty || fail=1

  echo xyz > in || fail=1

  compare /dev/null /dev/null >out 2>err || fail=1

  test -s out && fail_ "out not empty: $(cat out)"

  # "err" should be empty, too, but has "set -x" output when VERBOSE=yes

  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac

  compare /dev/null empty >out 2>err || fail=1

  test -s out && fail_ "out not empty: $(cat out)"

  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac

  compare in in >out 2>err || fail=1

  test -s out && fail_ "out not empty: $(cat out)"

  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac

  compare /dev/null in >out 2>err && fail=1

  cat <<\EOF > exp

diff -u /dev/null in

--- /dev/null	1970-01-01

+++ in	1970-01-01

+xyz

EOF

  compare exp out || fail=1

  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac

  compare empty in >out 2>err && fail=1

  # Compare against expected output only if compare is using diff -u.

  if grep @ out >/dev/null; then

    # Remove the TAB-date suffix on each --- and +++ line,

    # for both the expected and the actual output files.

    # Also remove the @@ line, since Solaris 5.10 and GNU diff formats differ:

    # -@@ -0,0 +1 @@

    # +@@ -1,0 +1,1 @@

    # Also, remove space after leading '+', since AIX 7.1 diff outputs a space.

    sed 's/	.*//;/^@@/d;s/^+ /+/' out > k && mv k out

    cat <<\EOF > exp

--- empty

+++ in

+xyz

EOF

    compare exp out || fail=1

  fi

  case $- in *x*) ;; *) test -s err && fail_ "err not empty: $(cat err)";; esac

}

test_compare

Exit $fail