#!/bin/bash

set -e

tests=0
failed=0
H=$PWD

function run_one
{
    D=`mktemp -d`
    if [ "$D" == "" ] ; then
	echo mktemp failed!
    fi

    cd $D
    fail=0

    if ! $H/$f > .out 2>&1 ; then
	echo $f failed with error code $?
	fail=1
    fi

    if [ -s .out -a ! -r $H/$f.out ] ; then
	echo $f generated unexpected output:
	cat .out
	cp .out $H/$f.err
	fail=1
    elif [ -r $H/$f.out ] && ! diff -u $H/$f.out .out > /dev/null ; then
	echo $f output changed:
	diff -u $H/$f.out .out && true
	cp .out $H/$f.err
	fail=1
    fi

    cd $H
    rm -r $D
    return $fail
}

TESTS=$@
if [ "$TESTS" == "" ] ; then
    TESTS=`ls test-* | grep -Ev "\.|~"`
fi

for f in $TESTS ; do
    echo -n "."
    if ! run_one $f ; then
	failed=$[$failed + 1]
    fi
    tests=$[$tests + 1]
done

echo
echo Ran $tests tests, $failed failed

if [ $failed -gt 0 ] ; then
    exit 1
fi