virt-v2v/tests/functions.sh.in

# nbdkit
# @configure_input@
# Copyright (C) 2017-2021 Red Hat Inc.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# * Neither the name of Red Hat nor the names of its contributors may be
# used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

# Common functions and variables used by tests.
#
# Most test scripts (tests/*.sh files) start with:
#
#   source ./functions.sh
#   set -e
#   set -x
#
#   skip_if_skipped

# Various variables defined by autoconf that test scripts might want
# to use.
OCAMLOPT="@OCAMLOPT@"
PYCODESTYLE="@PYCODESTYLE@"
abs_srcdir="@abs_srcdir@"
abs_top_srcdir="@abs_top_srcdir@"
abs_builddir="@abs_builddir@"
abs_top_builddir="@abs_top_builddir@"

# cleanup_fn cmd [args]
#
# Run the command ‘cmd [args]’ when the test script exits.  This is
# run in all cases when the script exits, so is a reliable way to
# clean up test files, external processes etc.
#
# Examples:
#   cleanup_fn rm -f test.out
#   cleanup_fn kill $pid
declare -a _cleanup_hook
cleanup_fn ()
{
    _cleanup_hook[${#_cleanup_hook[@]}]="$@"
}

_run_cleanup_hooks ()
{
    local _status=$? _i

    set +e
    trap '' INT QUIT TERM EXIT ERR
    echo $0: run cleanup hooks: exit code $_status

    for (( _i = 0; _i < ${#_cleanup_hook[@]}; ++_i )); do
        ${_cleanup_hook[_i]}
    done

    exit $_status
}
trap _run_cleanup_hooks INT QUIT TERM EXIT ERR

# requires program [args]
#
# Check that ‘program [args]’ works.  If not, skip the test.
# For example to check that qemu-img is available, do:
#
# requires qemu-img --version
requires ()
{
    ( "$@" ) </dev/null >/dev/null 2>&1 || {
        echo "$0: ‘$*’ failed with error code $?"
        echo "$0: test prerequisite is missing or not working"
        exit 77
    }
}

# Requires the current arch == $1.
requires_arch ()
{
    local m="$(uname -m)"
    case "$1" in
        # Some magic happens for some architectures.
        arm)
            if [[ ! "$m" =~ ^arm ]]; then
                echo "$0: test skipped because the current architecture ($m) is not arm (32 bit)"
                exit 77
            fi
            ;;
        i?86)
            if [[ ! "$m" =~ ^i?86 ]]; then
                echo "$0: test skipped because the current architecture ($m) is not $1"
                exit 77
            fi
            ;;
        *)
            if [ "$m" != "$1" ]; then
                echo "$0: test skipped because the current architecture ($m) is not $1"
                exit 77
            fi
            ;;
    esac
}

# Skip if $SKIP_<script_name> environment variable is set.
# Every test should call this function first.
skip_if_skipped ()
{
    local v
    if [ -n "$1" ]; then
        v="SKIP_$(basename $1 | tr a-z.- A-Z__)"
    else
        v="SKIP_$(basename $0 | tr a-z.- A-Z__)"
    fi
    if [ -n "${!v}" ]; then
        echo "$0: test skipped because \$$v is set"
        exit 77
    fi
    echo "$0: info: you can skip this test by setting $v=1"
}

# Skip if the user is trying to run a test as root.
# Tests shouldn't be run as root, but a few are especially dangerous.
skip_if_root ()
{
    if [ "$(id -u)" -eq 0 ]; then
        echo "$0: test skipped because you're running tests as root."
        echo "$0: it is NEVER a good idea to run libguestfs tests as root."
    exit 77
fi
}

# Slow tests should always call this function.  (See guestfs-hacking(1)).
slow_test ()
{
    if [ -z "$SLOW" ]; then
        echo "$(basename $0): use 'make check-slow' to run this test"
        exit 77
    fi
}

# Root tests should always call this function.  (See guestfs-hacking(1)).
root_test ()
{
    if test "$(id -u)" -ne 0; then
        echo "$(basename $0): use 'sudo make check-root' to run this test"
        exit 77
    fi
}

# These miscellaneous functions are used for testing OVAs.
do_md5 ()
{
  case "$(uname)" in
    Linux)
      md5sum "$1" | awk '{print $1}'
      ;;
    *)
      echo "$(basename $0): unknown method to calculate MD5 of file on $(uname)"
      exit 1
      ;;
  esac
}

do_sha1 ()
{
  case "$(uname)" in
    Linux)
      sha1sum "$1" | awk '{print $1}'
      ;;
    *)
      echo "$(basename $0): unknown method to calculate SHA1 of file on $(uname)"
      exit 1
      ;;
  esac
}

do_sha256 ()
{
  case "$(uname)" in
    Linux)
      sha256sum "$1" | awk '{print $1}'
      ;;
    *)
      echo "$(basename $0): unknown method to calculate SHA256 of file on $(uname)"
      exit 1
      ;;
  esac
}