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#!/bin/sh

TESTS=""
ONCE=""

SCRIPT_COUNT=0
for D in "$@"; do
    for TEST in "$D/"*.script; do
	if test "x${ONCE}" = "x"; then
	    ONCE=1
	    set -- "${TEST}"
	else
	    set -- "$@" "${TEST}"
	fi
	SCRIPT_COUNT=$(($SCRIPT_COUNT + 1))
    done
done

OLD_DIR=""
LOCALTMPDIR=$(mktemp -d)
DATADIR="${LOCALTMPDIR}/data"
SRCDIR=$(pwd)

export DATADIR SRCDIR

mkdir "${DATADIR}"
blow_away () { rm -fr "${LOCALTMPDIR}"; }
trap blow_away 0

SCRIPTS_RUN=0
TEST_COUNT=0
PASSES=0
FAILS=0

teardown_once () {
    test -x "$1/teardown-once" && "$1/teardown-once" >/dev/null 2>/dev/null
    rm -fr "${DATADIR}"
    mkdir "${DATADIR}"
}

setup_once () {
    test -d "${DATADIR}" || mkdir "${DATADIR}"
    test -x "$1/setup-once" && "$1/setup-once" >/dev/null 2>/dev/null
}

setup_for () {
    test -x "$1/setup" && "$1/setup" >/dev/null 2>/dev/null
    test -x "$1/$2.setup" && "$1/$2.setup" >/dev/null 2>/dev/null
}

teardown_for () {
    test -x "$1/$2.teardown" && "$1/$2.teardown" >/dev/null 2>/dev/null
    test -x "$1/teardown" && "$1/teardown" >/dev/null 2>/dev/null
}

FAILMSGS=""

pass_fail () {
    TEST_COUNT=$(($TEST_COUNT + 1))
    if test "x$1" = "x0"; then
	PASSES=$(($PASSES + 1))
    else
	FAILS=$(($FAILS + 1))
	THIS_FAIL=1
	if test "x$4" != "x"; then
	    FAILMSGS="${FAILMSGS}\n$(cat $4)"
	else
	    FAILMSGS="${FAILMSGS}\n$2: $3\n"
	fi
    fi
}

LONGEST_NAME=0
runtest () {
    THIS_FAIL=0
    TESTNAME="$2"
    export TESTNAME
    SCRIPTS_RUN=$(($SCRIPTS_RUN + 1))
    echo -n "${SCRIPTS_RUN}/${SCRIPT_COUNT}: ${TESTNAME}"
    TEST_LEN=${#TESTNAME}
    if test $TEST_LEN -gt $LONGEST_NAME; then
	LONGEST_NAME=$TEST_LEN
    else
	SPACES=$(($LONGEST_NAME - $TEST_LEN))
	while test $SPACES -gt 0; do
	    echo -n " "
	    SPACES=$(($SPACES - 1))
	done
    fi
    echo -n -e '\r'
    if test -r "$1/$2.stdin"; then
	# Run the test with stdin
	"$1/$2.script" < "$1/$2.stdin" > "$1/$2.stdout-actual" 2> "$1/$2.stderr-actual"
	TEST_EXIT=$?
    else
	"$1/$2.script" < /dev/null > "$1/$2.stdout-actual" 2> "$1/$2.stderr-actual"
	TEST_EXIT=$?
    fi
    WANT_EXIT=$(test -r "$1/$2.exit" && cat "$1/$2.exit")
    WANT_EXIT=${WANT_EXIT:-0}
    test "x$TEST_EXIT" = "x$WANT_EXIT"
    pass_fail "$?" "$1/$2" "exit code $TEST_EXIT is not $WANT_EXIT"
    if test -r "$1/$2.stdout"; then
	diff -u "$1/$2.stdout" "$1/$2.stdout-actual" > "$1/$2.stdout-diff"
	pass_fail "$?" "$1/$2" "stdout differs"
    else
	diff -u /dev/null "$1/$2.stdout-actual" > "$1/$2.stdout-diff"
	pass_fail "$?" "$1/$2" "stdout differs"  "$1/$2.stdout-diff"
    fi
    if test -r "$1/$2.stderr"; then
	diff -u "$1/$2.stderr" "$1/$2.stderr-actual" > "$1/$2.stderr-diff"
	pass_fail "$?" "$1/$2" "stderr differs" "$1/$2.stderr-diff"
    else
	diff -u /dev/null "$1/$2.stderr-actual" > "$1/$2.stdout-diff"
	pass_fail "$?" "$1/$2" "stderr differs"
    fi
    if test "x$THIS_FAIL" = "x0"; then
	rm -f "$1/$2.stdout-actual" "$1/$2.stderr-actual"
	rm -f "$1/$2.stdout-diff" "$1/$2.stderr-diff"
    fi
}

ONCE=""
for T in "$@"; do
    if test "x${ONCE}" = "x"; then
	ONCE=1
	set --
    fi
    CUR_DIR=$(dirname "$T")
    if test "x${OLD_DIR}" != "x${CUR_DIR}"; then
	test "x${OLD_DIR}" != "x" && teardown_once "${OLD_DIR}"
	setup_once "${CUR_DIR}"
	OLD_DIR="${CUR_DIR}"
    fi
    TEST_NAME=$(basename "$T" .script)
    setup_for "${CUR_DIR}" "${TEST_NAME}"
    runtest "${CUR_DIR}" "${TEST_NAME}"
    teardown_for "${CUR_DIR}" "${TEST_NAME}"
done

test "x${OLD_DIR}" != "x" && teardown_once "${OLD_DIR}"

SPACES=$((${#LONGEST_NAME} + ${#SCRIPTS_RUN} + ${#SCRIPT_COUNT} + 3))
while test $SPACES -gt 0; do
    echo -n " "
    SPACES=$(($SPACES - 1))
done

echo -n -e '\r'

echo "Totals: ${SCRIPTS_RUN} tests run, comprising ${TEST_COUNT}."
echo "Of those, ${PASSES} passed and ${FAILS} failed."

echo "${FAILMSGS}"

for F in "$@"; do
    echo "$F:"
    cat "$F"
done