#!/bin/bash
# Prepare and run a test
#
#  Copyright (C) 2014 Mike Gerwitz
#
#  This file is part of pkgsh.
#
#  pkgsh 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/>.
#
# This sets up the environment prior to running a test.
##

# change wd to root to place us in a known state for sourcing
declare -r __wd_orig="$( pwd )"
cd "$( dirname "$0" )/../" || {
  echo "fatal: could not determine root directory" >&2
  exit 1
}


##
# Provide command to output assertion on failure
#
# We do not override the `test` builtin, as this would also affect pkgsh
# itself.
#
assert()
{
  test "$@" || {
    local -i code=$?
    echo "assertion failed: \`$@\` in ${BASH_SOURCE[1]}:${BASH_LINENO[0]}"
    echo -n 'prev: '
    caller 1
    return $code
  } >&2
}


main()
{
  local tpath="$1"

  # fail on any sort of command failure
  set -e
  source "$__wd_orig/$tpath"
}

main "${1?Missing test path}"