#! /bin/sh

#####################################
#This script just runs the tests of 
#libcroco, saves their result, diff them
#against a set of reference results and
#displays OK/KO.
#To use it as a tester, the best way is
#just to run 'testctl run' and see the result.
####################################

#the directory that contains the tests sources is:
#$TEST_SOURCE_DIR. User can set this var in the environment
#before calling this script. Otherwise, we set it to a default value
if test x$TEST_SOURCE_DIR = x ; then
	TEST_SOURCE_DIR=`dirname "$0"`
fi

#the directory that contains the test outputs is:
#$TEST_OUT_DIR
#User can set this var in the environment before
#calling this script. Otherwise, we set it to a default value.
if test x$TEST_OUT_DIR = x ; then
	TEST_OUT_DIR=tests
fi


#the list of tests to be run
TEST_PROG_LIST=

#the test input dirs.
TEST_INPUT_DIR=test-inputs

#the reference test output dirs.
TEST_OUT_REF_DIR=test-output-refs

#temporary test result dir
TEST_OUTPUT_DIR=test-outputs

ERROR_REPORT_FILE=tests-error.log
COMMAND_LIST=
COMMAND=
if test x$RUN_VALGRIND = x ; then
    RUN_VALGRIND=no
else
    RUN_VALGRIND=yes
fi
if test "x$CHECKER" = "x" ; then
    CHECKER="valgrind --tool=memcheck"
fi

VALGRIND_LOGS_DIR=valgrind-logs
VALGRIND=
TEST_PROG=
EGREP=`which egrep`
if test "empty$EGREP" = "empty" ; then
    echo "You don't have the egrep program installed"
    echo "Please, install it first"
fi

DIFF=`which diff`
if test "empty$DIFF" = "empty" ; then
    echo "You don't have the diff program installed"
    echo "Please, install is first"
fi

display_usage ()
{
    echo ""
    echo "usage: $0 [general options] <command> [command option]"
    echo ""
    echo "where general options are:"
    echo "===================="
    echo "-h|--help     displays this help"
    echo ""
    echo "commands are:"
    echo "=============="
    echo "run           run the tests and display their result"
    echo "ref           run the tests but saves their output as a reference"
    echo "cleanup       removes the tmp directories that may have been created"    
    echo ""
    echo "run command options:"
    echo "--valgrind runs the test using valgrind"
    echo "--testprog <test program>"
}

parse_command_line ()
{
    if test "empty$1" = "empty" ; then
	display_usage ;
	exit -1
    fi

    while true ; do
	arg=$1

	if test "empty$arg" = "empty" ; then
	    break ;
	fi

	case "$arg" in
	    -h|--help)
		display_usage $@
		exit 0
		;;

	    -*)
		echo "$0: unknown option: $arg"
		display_usage $@
		exit 0
		;;

	    run|ref|cleanup)		
		COMMAND_LIST=$arg
		REMAINING_ARGS=$@
		echo "REMAINING_ARGS=$REMAINING_ARGS"
		break ;
		;;

	    *)
		display_usage $@
		exit 0
		;;
	esac
    done
}


#builds the list of available test functions.
build_tests_list ()
{
    for TEST_PROG in "$TEST_SOURCE_DIR"/test*.sh "$TEST_OUT_DIR"/test?; do
	TEST_PROG=`basename $TEST_PROG`	
	echo "run test: $TEST_PROG"
	TEST_PROG_LIST="$TEST_PROG_LIST $TEST_PROG"
    done
}

#runs a test programs.
#usage run_test_prog <test-name> <reference> <display-on-stdout>
#where "test-name" is the name of the test program to run
#"reference" is a boolean value: yes/no. (the string "yes" or the string no)
#if yes, means that the output of the test is to be saved as a reference.
#if no, means that the output of the test is to be saved as a result of a test.
run_test_prog ()
{
    TEST_PROG="$1"
    REFERENCE="$2"
    DISPLAY_ON_STDOUT="$3"
    OUTPUT_DIR=
    OUTPUT_SUFFIX=
    TEST_INPUT_LIST=
    VALGRIND_OPTIONS="--error-limit=no --num-callers=100 --logfile=$TEST_OUT_DIR/$VALGRIND_LOGS_DIR/$TEST_PROG-valgrind.log  --leak-check=yes --show-reachable=yes --quiet --suppressions=$TEST_SOURCE_DIR/vg.supp"
    if test x$RUN_VALGRIND = xno ; then
	VALGRIND=
    else
	if ! test -x "$TEST_SOURCE_DIR"/valgrind-version.sh ; then
	    echo "Argh! Could not find file $TEST_SOURCE_DIR/valgrind-version.sh"
	    exit -1 ;
	fi
	version=`"$TEST_SOURCE_DIR"/valgrind-version.sh`
	if ! test "x$version" = "xokay" ; then
	    echo "You must install a valgrind version greater than 2.1.1"
	    echo "version=$version"
	    exit -1
	fi
	if test "x$CHECKER" = "x" ; then
	    VALGRIND=`which valgrind`
	    if test "x$VALGRIND" = x ; then
		echo "Could not find valgrind in your path"
	    else
		VALGRIND="$VALGRIND $VALGRIND_OPTIONS"
		echo "Gonna run the tests with valgrind, using the following options: $VALGRIND_OPTIONS"
	    fi
	else
	    VALGRIND="$CHECKER $VALGRIND_OPTIONS"
	    echo "Gonna run the tests with valgrind, using the cmd line: $VALGRIND"
	fi
    fi
    export VALGRIND
    case "$TEST_PROG" in
      *.sh) is_shell_script=yes ;;
      *)    is_shell_script=no ;;
    esac

    if ! test -d "$TEST_OUT_DIR/$VALGRIND_LOGS_DIR" ; then
	mkdir "$TEST_OUT_DIR/$VALGRIND_LOGS_DIR"
    fi

    for TEST_INPUT in `ls -1 "$TEST_SOURCE_DIR/$TEST_INPUT_DIR" | egrep "^${TEST_PROG}"'[.0-9]+css$'` ; do
	TEST_INPUT_LIST="$TEST_INPUT_LIST $TEST_INPUT"
    done

    if test "$REFERENCE" = "yes" ; then
	OUTPUT_DIR="$TEST_SOURCE_DIR/$TEST_OUT_REF_DIR"
	OUTPUT_SUFFIX=.out
    else
	OUTPUT_DIR="$TEST_OUT_DIR/$TEST_OUTPUT_DIR"
	OUTPUT_SUFFIX=.out
	if test ! -d "$OUTPUT_DIR" ; then
	    echo "creating tmp directory $OUTPUT_DIR ..."
	    mkdir "$OUTPUT_DIR"
	    echo "done"
	fi
    fi

    if test "empty$TEST_INPUT_LIST" != "empty" ; then
	for TEST_INPUT in $TEST_INPUT_LIST ; do
	    TEST_INPUT_NAME=`basename $TEST_INPUT .sh`
	    if test "$DISPLAY_ON_STDOUT" = "yes" ; then
		echo "###############################################"
		echo "launching $VALGRIND $TEST_PROG $TEST_SOURCE_DIR/$TEST_INPUT_DIR/$TEST_INPUT"....
		echo "###############################################"		
		if test x$is_shell_script = xyes ; then
		    "$TEST_SOURCE_DIR/$TEST_PROG" "$TEST_SOURCE_DIR/$TEST_INPUT_DIR/$TEST_INPUT"
		else
		    $VALGRIND "$TEST_OUT_DIR/.libs/$TEST_PROG" "$TEST_SOURCE_DIR/$TEST_INPUT_DIR/$TEST_INPUT"
		fi		
		echo "###############################################"
		echo  "done"
		echo "###############################################"
		echo ""
	    else
		echo "executing $VALGRIND $TEST_PROG $TEST_SOURCE_DIR/$TEST_INPUT_DIR/$TEST_INPUT > $OUTPUT_DIR/${TEST_INPUT_NAME}${OUTPUT_SUFFIX} ..."
		$VALGRIND "$TEST_OUT_DIR/.libs/$TEST_PROG" "$TEST_SOURCE_DIR/$TEST_INPUT_DIR/$TEST_INPUT" > "$OUTPUT_DIR/${TEST_INPUT_NAME}${OUTPUT_SUFFIX}"
		echo "done"
	    fi
	done
    else
	if test "$DISPLAY_ON_STDOUT" = "yes" ; then
	    echo "####################################################"
	    echo "launching $VALGRIND $TEST_PROG ..."
	    echo "####################################################"
	    if test x$is_shell_script = xyes ; then
		"$TEST_SOURCE_DIR/$TEST_PROG"
	    else
		$VALGRIND "$TEST_OUT_DIR/.libs/$TEST_PROG"
	    fi
	    echo "####################################################"
	    echo "done"
	    echo "####################################################"
	    echo ""
	else
	    TEST_INPUT_NAME=`basename "$TEST_PROG" .sh`
	    echo "executing $VALGRIND $TEST_PROG  > $OUTPUT_DIR/${TEST_PROG}${OUTPUT_SUFFIX} ..."
	    if test x$is_shell_script = xyes ; then
		"$TEST_SOURCE_DIR/$TEST_PROG" > "$OUTPUT_DIR/${TEST_INPUT_NAME}${OUTPUT_SUFFIX}"
	    else
		$VALGRIND "$TEST_OUT_DIR/.libs/$TEST_PROG" > "$OUTPUT_DIR/${TEST_INPUT_NAME}${OUTPUT_SUFFIX}"
	    fi
	    echo "done"
	fi
    fi
    unset VALGRIND
}

cleanup_tests ()
{
    if test -d "$TEST_OUT_DIR/$TEST_OUTPUT_DIR" ; then
	echo "removing $TEST_OUT_DIR/$TEST_OUTPUT_DIR/*"
	rm -rf "$TEST_OUT_DIR/$TEST_OUTPUT_DIR"
	rm -rf "$TEST_OUT_DIR/$VALGRIND_LOGS_DIR"
    fi
    if test -f "$TEST_OUT_DIR/$ERROR_REPORT_FILE" ; then
	rm "$TEST_OUT_DIR/$ERROR_REPORT_FILE"
    fi
}

run_test_report ()
{
    diff -ur --exclude='*CVS*' --exclude='*cvs*' --exclude='Makefile*' --exclude=.arch-ids "$TEST_SOURCE_DIR/$TEST_OUT_REF_DIR" "$TEST_OUT_DIR/$TEST_OUTPUT_DIR" > "$TEST_OUT_DIR/tmpdiff.$$"
    NB_DIFF=`wc -l < "$TEST_OUT_DIR/tmpdiff.$$"`

    if test "$NB_DIFF" -eq 0 ; then
	echo "/////////////ALL THE TESTS ARE OK :) //////////////////"
	rm "$TEST_OUT_DIR/tmpdiff.$$"
    else
	echo "SOME TESTS ARE KO :("
	mv "$TEST_OUT_DIR/tmpdiff.$$" "$TEST_OUT_DIR/$ERROR_REPORT_FILE"
	echo "See $TEST_OUT_DIR/$ERROR_REPORT_FILE to see what's going on"
    fi

    ###################
    #Valgrind errors  #
    ###################
    memleaks=no
    for vg_log in `find "$TEST_OUT_DIR/$VALGRIND_LOGS_DIR" -name '*-valgrind.log*' -print` ; do
	if test -s "$vg_log" ; then
	    leaks=`cat "$vg_log" | grep -i leak | grep -v no`
	    errors=`cat "$vg_log" | grep -w Invalid`
	    if test "x$leaks" = "x" -a "x$errors" = "x" ; then
		rm -f "$vg_log" ;
	    else
		echo "valgrind reported some memory leaks/corruptions in $vg_log"
		memleaks=yes
	    fi
	else
	    rm "$vg_log"
	fi
    done
    if test "x$RUN_VALGRIND" = "xyes" ; then
	if test "x$memleaks" = "xno" ; then
	    echo "Oh, YESSSSSS!, VALGRIND DID NOT DETECT ANY MEMLEAK !! You can go have a beer."
	else
	    echo "Please report these leaks by sending the valgrind logs to the authors of libcroco."
	fi
    fi
}

############################
#Executes the "run" command along with
#its command options.
#For the sake of safety checking
############################
execute_run_cmd ()
{
    args=$@

    if test "$1" != "run" ; then
	echo "internal error: first argument should be \'run\'"
	return
    fi
    shift

    while true ; do
	cur_arg=$1
	echo "cur_arg=$cur_arg"

	case $cur_arg in
	    --valgrind)
		RUN_VALGRIND=yes
		shift
		;;

	    "--testprog")
		shift
		if test "empty$1" = "empty" ; then
		    echo "--testprog should be followed by a prog name"
		    display_usage
		    exit
		fi
		TEST_PROG=$1
		echo "TEST_PROG=$TEST_PROG"
		shift
		;;

	    *)
		break 
		;;
	esac
    done

    if test "empty$TEST_PROG" = "empty"; then
	build_tests_list ;
	if test "empty$TEST_PROG_LIST" = "empty" ; then
	    echo "could not find any test to run"
	    exit
	fi

	for TEST in $TEST_PROG_LIST ; do
	    run_test_prog "$TEST" no no;
	done
	run_test_report ;
    else
	#run the test and display result on stdout
	run_test_prog "$TEST_PROG" no yes ;
    fi
}

##############################
#Analyzes a command string "<command> [command option]"
#and runs the necessary commands.
#
#Must be called with the command line
#starting with a command name.
#all the previous general argument must
#have been stripped away.
#############################
execute_command ()
{
    arg="$1" ;

    case "$arg" in

	run)
	    execute_run_cmd "$@"
	    ;;

	ref)
	    build_tests_list ;
	    if test "empty$TEST_PROG_LIST" = "empty" ; then
		echo "could not find any test to run"
		exit
	    fi

	    for TEST in $TEST_PROG_LIST ; do
		run_test_prog "$TEST" yes no;
	    done
	    ;;

	cleanup)
	    cleanup_tests
	    ;;

	*)
	    echo "unknown command"
	    exit ;
    esac
    
}

main ()
{
    parse_command_line $@

    if test "empty$COMMAND_LIST" = "empty" ; then
	echo "no test command to execute"
	exit
    fi

    execute_command $REMAINING_ARGS
}

main $@