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# Common testsuite functions
#
# Copyright (C) 2019  Patrick McDermott
#
# This file is part of the ProteanOS Development Kit.
#
# The ProteanOS Development Kit 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.
#
# The ProteanOS Development Kit 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 the ProteanOS Development Kit.  If not, see
# <http://www.gnu.org/licenses/>.

LF='
'

# is_diff() is based on cmd_is() from opkbuild 4.0.2, with test results passed
# by argument and context added to the diagnostic output.
is_diff()
{
	local description="${1}"
	local got="${2}"
	local exp="${3}"
	shift 3
	local ok=
	local diag=
	local eof=

	ok=true
	diag=''
	exec 3<<-EOF
		${got}
		EOF
	exec 4<<-EOF
		${exp}
		EOF
	while :; do
		eof=0
		read -r got 0<&3 || eof=$((${eof} + 1))
		read -r exp 0<&4 || eof=$((${eof} + 2))
		[ ${eof} -eq 3 ] && break
		if [ x"${got}" = x"${exp}" ]; then
			diag="${diag}              '${got}'${LF}"
		else
			ok=false
			diag="${diag}         got: '${got}'${LF}"
			diag="${diag}    expected: '${exp}'${LF}"
		fi
	done
	exec 3<&-
	exec 4<&-

	if ${ok}; then
		ok_ -- "${description}"
	else
		not_ok_ -- "${description}"
		diag_ " Failed test '${description}'"
		while IFS='' read -r diag; do
			diag_ "${diag}"
		done <<-EOF
			${diag}
			EOF
	fi
}