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#!/bin/sh
#
# The regression-test driver script.  This used to be explicit in the
# makefile before we regrouped the regression tests by stable and unstable
# drivers.

# Requires GNU date extensions
# Should return an empty blank string if those are not present.
starttime=`date +"%s" 2>/dev/null`

# We need to have the build directory in $GPSD_HOME to find the new gpsd
if [ "`dirname $0`" = "." ]; then
    GPSD_HOME=`pwd`
else
    GPSD_HOME=`dirname $0`
fi

# Arrange to call a gpsfake in the source directory without fuss.
if [ -z ${PYTHON} ]; then
    PYTHON="python"
fi
# For an explanation of what we define here, see the comment on
# PYTHON_DISTUTILS_LIBDIR/PYTHON_DISTUTILS_SCRIPTDIR in configure.ac
py_libdir=`pwd`/build/`${PYTHON} -c 'import distutils.util; import sys; print("lib.%s-%s" %(distutils.util.get_platform(), sys.version[0:3]))'`
py_scriptdir=`pwd`/build/`${PYTHON} -c 'import sys; print("scripts-%s" %(sys.version[0:3], ))'`
if [ -d ${py_libdir} ] && [ -d ${py_scriptdir} ]; then
    PYTHONPATH=${py_libdir}
    export PYTHONPATH

    PATH=${py_scriptdir}:${PATH}
fi
export GPSD_HOME PATH

mode=regress
testing=daemon
opts=""
logfile=""
help="0"
while getopts cl:strbuvo:h opt
do
    case $opt in
	c) testing=clientlib ;;	# Can be 'daemon'
	l) logfile=$OPTARG ;;	# Logfile to save diffs to
	s) mode=regress ;;	# Run regression tests
	t) opts="-b $opts" mode=regress ;;	# Run regression tests w/baton
	r) mode=superraw ;;	# Run superraw regressions (r=2 mode)
	b) mode=build ;;	# Rebuild regression check files
	u) opts="$opts -u" ;;	# Force UDP
	v) mode=view ;;		# View result of generating a check file
	o) opts="$opts $OPTARG" ;;	# Pass options to gpsfake
	h) help="1"
    esac
done
shift $(($OPTIND - 1))

if [ $help -eq "1" ]
then
	echo
	echo
	echo "Regression test driver script"
	echo "-h  - this help"
	echo "-c  - can be 'daemon'"
	echo "-l <filename>  - where to log diffs to"
	echo "-s  - run regreession tests"
	echo "-t <ots>  - Run regression tests w/baton"
	echo "-r  - run superraw regressions (r=2 mode)"
	echo "-b  - Rebuild regression check files"
	echo "-u <opt> - Force UDP"
	echo "-v  - view result of generating a check file"
	echo "-o <opt> - Pass options to gpsfake"
	echo

	exit 0
fi

# Enables us to turn debugging up high without screwing up the diff checks
# First and Second filter out gpsd log messages.
# Third filters out gps.py verbose loggging
# Fourth filters out WATCH responses
# Fifth filters out DEVICE responses
# Sixth filters out VERSION responses
# Seventh filters out device fields
GPSFILTER="sed -e /^gpsd:/d -e /^gpsfake/d -e /GPS-DATA/d -e /WATCH/d -e /DEVICE/d -e /VERSION/d -e s/,\"device\":[^,}]*//"

# Use ALTFILTER to set up custom filtering when a regression test fails
# This example filters out altitude and some fields computed by gpsd's error
# modeling - these are fragile in the prsence of changes to the fix-buffering
# logic. Note that as the last attribute mode needs to be handled differently.
#ALTFILTER="-e s/\"alt\":[^,]*,// -e s/\"ep[vhs]\":[-+0-9.]*// -e s/,\"mode\":[^}]*//"

TMP=/tmp

# Only twirl the baton on a tty, avoids junk in transcripts.
if [ -t 1 ]
then
    opts="$opts -b"
fi

case $mode in
    regress)
        echo "Testing the $testing..." >&2
        errors=0; total=0; notfound=0;error_list="";
        for f in $*; do
	    if [ -r $f.chk ]
	    then
		trap 'rm -f ${TMP}/test-$$.chk; exit $errors' EXIT HUP INT TERM
		case $testing in
		daemon) ${PYTHON} ${GPSD_HOME}/gpsfake -s 38400 -1 -p $opts ${f} | ${GPSFILTER} ${ALTFILTER} >${TMP}/test-$$.chk ;;
		clientlib) ${GPSD_HOME}/libgps -b <${f} >${TMP}/test-$$.chk ;;
		esac
		if [ "${ALTFILTER}" ]
		then
		    trap 'rm -f ${TMP}/test-$$.chk ${TMP}/testout-$$.chk ${TMP}/testin-$$.chk ${TMP}/diff-$$; exit $errors' EXIT HUP INT TERM
		    sed -n <${f}.chk >${TMP}/testin-$$.chk ${ALTFILTER} -e 'p';
		    sed -n <${TMP}/test-$$.chk >${TMP}/testout-$$.chk ${ALTFILTER} -e 'p';
		    diff -ub ${TMP}/testin-$$.chk ${TMP}/testout-$$.chk >${TMP}/diff-$$;
		else
		    diff -ub ${f}.chk ${TMP}/test-$$.chk >${TMP}/diff-$$;
		fi
		if test -s ${TMP}/diff-$$ ; then
		    errors=`expr $errors + 1`;
                    error_list="$error_list \"${f}\""
		    if [ -z "$logfile" ]
		    then
			cat ${TMP}/diff-$$
		    else
			cat ${TMP}/diff-$$ >>$logfile
		    fi
		fi;
		rm -f ${TMP}/test-$$.chk ${TMP}/testout-$$.chk ${TMP}/testin-$$.chk ${TMP}/diff-$$
	    else
		echo "*** No check log $f.chk exists"
		notfound=`expr $notfound + 1`;
	    fi
	    total=`expr $total + 1`;
        done;
        if test $errors -gt 0; then
            echo "Regression test FAILED: $errors errors in $total tests total ($notfound not found).";
            echo "The following test Failed:"
            echo "================================================================"
            for err in $error_list
            do
		echo $err
            done
            echo "================================================================"
            status=1;
        else
            echo "Regression test successful: no errors in $total tests ($notfound not found).";
            status=0;
        fi
        ;;
    superraw)
        echo "Testing super-raw mode..." >&2
        for f in $*; do
            ${PYTHON} ${GPSD_HOME}/gpsfake -s 38400 -1 -p $opts -r '{"class":"WATCH","enable":False,"raw":2}' $opts ${f} \
            | ./devtools/striplog -1 >${TMP}/test1-$$.chk;
            ./devtools/striplog <${f} >${TMP}/test2-$$.chk;
            cmp ${TMP}/test[12]-$$.chk;
        done; rm ${TMP}/test[12]-$$.chk
        ;;
    build)
	echo "Rebuilding $testing regressions..." >&2
        for f in $*; do
	    case $testing in
            daemon) ${PYTHON} ${GPSD_HOME}/gpsfake -s 38400 -1 -p $opts ${f} | ${GPSFILTER} >${f}.chk;;
	    clientlib) ${GPSD_HOME}/libgps -b <${f} >${f}.chk ;;
            esac
        done
        status=0
        ;;
    view)
        echo "Viewing..." >&2
        for f in $*; do
	    case $testing in
            daemon) ${PYTHON} ${GPSD_HOME}/gpsfake -s 38400 -1 -p $opts ${f} | ${GPSFILTER} ;;
            clientlib) ${GPSD_HOME}/libgps -b <${f} ;;
            esac
        done
        status=0
        ;;
esac

# See starttime above
endtime=`date +"%s" 2>/dev/null`

if [ "$starttime" -a "$endtime" ]
then
    echo -n "Elapsed time: "
    echo "scale=2; ${endtime} - ${starttime}" | bc
fi

exit $status