AT_TESTED([ovs-vswitchd])
AT_TESTED([ovs-vsctl])
AT_TESTED([perl])

m4_include([m4/compat.m4])

dnl Make AT_SETUP automatically run the ovs_init() shell function
dnl as the first step in every test.
m4_rename([AT_SETUP], [OVS_AT_SETUP])
m4_define([AT_SETUP], [OVS_AT_SETUP($@)
ovs_init
])
m4_divert_push([PREPARE_TESTS])
[
# Set ovs_base to the base directory in which the test is running and
# initialize the OVS_*DIR environment variables to point to this
# directory.
ovs_init() {
    ovs_base=`pwd`
    trap '. "$ovs_base/cleanup"' 0
    : > cleanup
    ovs_setenv
}

# With no parameter or an empty parameter, sets the OVS_*DIR
# environment variables to point to $ovs_base, the base directory in
# which the test is running.
#
# With a parameter, sets them to $ovs_base/$1.
ovs_setenv() {
    sandbox=$1
    ovs_dir=$ovs_base${1:+/$1}
    OVS_RUNDIR=$ovs_dir; export OVS_RUNDIR
    OVS_LOGDIR=$ovs_dir; export OVS_LOGDIR
    OVS_DBDIR=$ovs_dir; export OVS_DBDIR
    OVS_SYSCONFDIR=$ovs_dir; export OVS_SYSCONFDIR
    OVS_PKGDATADIR=$ovs_dir; export OVS_PKGDATADIR
}

ovs_wait () {
    # First try the condition without waiting.
    ovs_wait_cond && return 0

    # Try a quick sleep, so that the test completes very quickly
    # in the normal case.  POSIX doesn't require fractional times to
    # work, so this might not work.
    sleep 0.1
    ovs_wait_cond && return 0

    # Then wait up to 10 seconds.
    for d in 0 1 2 3 4 5 6 7 8 9; do
        sleep 1
        ovs_wait_cond && return 0
    done
    return 1
}

# Prints the integers from $1 to $2, increasing by $3 (default 1) on stdout.
seq () {
    while test $1 -le $2; do
        echo $1
        set `expr $1 + ${3-1}` $2 $3
    done
}

if test "$IS_WIN32" = "yes"; then
    pwd () {
        command pwd -W "$@"
    }

    diff () {
        command diff --strip-trailing-cr "$@"
    }

    # tskill is more effective than taskkill but it isn't always installed.
    if (tskill //?) >/dev/null 2>&1; then :; else
        tskill () { taskkill //F //PID $1 >/dev/null; }
    fi

    kill () {
        signal=
        retval=0
        for arg; do
            case $arg in
            -*) signal=$arg ;;
            [1-9][0-9]*)
                # tasklist always returns 0.
                # If pid does exist, there will be a line with the pid.
                if tasklist //fi "PID eq $arg" | grep $arg >/dev/null; then
                    if test "X$signal" != "X-0"; then
                        tskill $arg
                    fi
                else
                    retval=1
                fi
                ;;
            esac
        done
        return $retval
    }
fi

# parent_pid PID
#
# Prints the PID of the parent of process PID.
parent_pid () {
    # Using "ps" is portable to any POSIX system, but busybox "ps" (used in
    # e.g. Alpine Linux) is noncompliant, so we use a Linux-specific approach
    # when it's available.  We check the format of the status file to avoid
    # the NetBSD file with the same name but different contents.
    if egrep '^PPid:[[:space:]]*[0-9]*$' /proc/$1/status > /dev/null 2>&1; then
        sed -n 's/^PPid:	\([0-9]*\)/\1/p' /proc/$1/status
    else
        ps -o ppid= -p $1
    fi
}

# kill_ovs_vswitchd [PID]
#
# Signal the ovs-vswitchd daemon to exit gracefully and wait for it to
# terminate or kill it if that takes too long.
#
# It is used to cleanup all sorts of tests and results. It can't assume
# any state, including the availability of PID file which can be provided.
kill_ovs_vswitchd () {
    # Use provided PID or save the current PID if available.
    TMPPID=$1
    if test -z "$TMPPID"; then
        TMPPID=$(cat $OVS_RUNDIR/ovs-vswitchd.pid 2>/dev/null)
    fi

    # Tell the daemon to terminate gracefully
    ovs-appctl --timeout=10 -t ovs-vswitchd exit --cleanup 2>/dev/null

    # Nothing else to be done if there is no PID
    test -z "$TMPPID" && return

    for i in 1 2 3 4 5 6 7 8 9; do
        # Check if the daemon is alive.
        kill -0 $TMPPID 2>/dev/null || return

        # Fallback to whole number since POSIX doesn't require
        # fractional times to work.
        sleep 0.1 || sleep 1
    done

    # Make sure it is terminated.
    kill $TMPPID
}

# Normalize the output of 'wc' to match POSIX.
# POSIX says 'wc' should print "%d %d %d", but GNU prints "%7d %7d %7d".
# POSIX says 'wc -l' should print "%d %s", but BSD prints "%8d".
#
# This fixes all of those (it will screw up filenames that contain
# multiple sequential spaces, but that doesn't really matter).
wc () {
   command wc "$@" | tr -s ' ' ' ' | sed 's/^ *//'
}
]
m4_divert_pop([PREPARE_TESTS])

m4_define([OVS_WAIT], [dnl
ovs_wait_cond () {
    $1
}
if ovs_wait; then :
else
    $2
    AT_FAIL_IF([:])
fi
])

dnl OVS_WAIT_UNTIL(COMMAND)
dnl
dnl Executes shell COMMAND in a loop until it returns
dnl zero return code.  If COMMAND did not return
dnl zero code within reasonable time limit, then
dnl the test fails.
m4_define([OVS_WAIT_UNTIL], [OVS_WAIT([$1], [$2])])

dnl OVS_WAIT_WHILE(COMMAND)
dnl
dnl Executes shell COMMAND in a loop until it returns
dnl non-zero return code.  If COMMAND did not return
dnl non-zero code within reasonable time limit, then
dnl the test fails.
m4_define([OVS_WAIT_WHILE],
  [OVS_WAIT([if $1; then return 1; else return 0; fi], [$2])])

dnl OVS_APP_EXIT_AND_WAIT(DAEMON)
dnl
dnl Ask the daemon named DAEMON to exit, via ovs-appctl, and then wait for it
dnl to exit.
m4_define([OVS_APP_EXIT_AND_WAIT],
  [AT_CHECK([test -e $OVS_RUNDIR/$1.pid])
   TMPPID=$(cat $OVS_RUNDIR/$1.pid)
   AT_CHECK(m4_if([$1],[ovs-vswitchd],
                  [ovs-appctl -t $1 exit --cleanup],
                  [ovs-appctl -t $1 exit]))
   OVS_WAIT_WHILE([kill -0 $TMPPID 2>/dev/null])])

dnl OVS_APP_EXIT_AND_WAIT_BY_TARGET(TARGET, PIDFILE)
dnl
dnl Ask the daemon identified by TARGET to exit, via ovs-appctl (using the target
dnl argument), and then wait for it to exit.
m4_define([OVS_APP_EXIT_AND_WAIT_BY_TARGET],
  [AT_CHECK([test -e $2])
   TMPPID=$(cat $2)
   AT_CHECK([ovs-appctl --target=$1 exit])
   OVS_WAIT_WHILE([kill -0 $TMPPID 2>/dev/null])])

dnl on_exit "COMMAND"
dnl
dnl Add the shell COMMAND to a collection executed when the current test
dnl completes, as a cleanup action.  (The most common use is to kill a
dnl daemon started by the test.  This is important to prevent tests that
dnl start daemons from hanging at exit.)
dnl
dnl Cleanup commands are executed in the reverse order of calls to this
dnl function.
m4_divert_text([PREPARE_TESTS], [dnl
on_exit () {
    (echo "$1"; cat cleanup) > cleanup.tmp
    mv cleanup.tmp cleanup
}
])

dnl Autoconf 2.63 compatibility verison of macro introduced in Autoconf 2.64:
m4_ifndef([AS_VAR_APPEND],
  [m4_divert_text([PREPARE_TESTS],
    [as_var_append () {
       eval $1=\$$1\$2
     }
])
   m4_define([AS_VAR_APPEND], [as_var_append $1 $2])])

dnl Autoconf 2.63 compatibility verison of macro introduced in Autoconf 2.64:
m4_ifndef([AT_CHECK_UNQUOTED],
  [m4_define([AT_CHECK_UNQUOTED],
  [_AT_CHECK([$1], [$2], AS_ESCAPE(m4_dquote(m4_expand([$3])), [""]),
    AS_ESCAPE(m4_dquote(m4_expand([$4])),[""]), [$5], [$6])])])

dnl Autoconf 2.63 compatibility verison of macro introduced in Autoconf 2.64:
m4_ifndef([AT_SKIP_IF],
  [m4_define([AT_SKIP_IF],
    [AT_CHECK([($1) \
    && exit 77 || exit 0], [0], [ignore], [ignore])])])

dnl Autoconf 2.63 compatibility verison of macro introduced in Autoconf 2.64:
m4_ifndef([AT_FAIL_IF],
  [m4_define([AT_FAIL_IF],
    [AT_CHECK([($1) \
    && exit 99 || exit 0], [0], [ignore], [ignore])])])