test

#!/bin/bash

set -e

self_test () {
    cmd=`head -n1 $1`
    echo "$cmd"
    tmp_file=`mktemp`
    echo "$cmd" > $tmp_file
    echo "=====================================================================" >> $tmp_file
    bash -c "$cmd" >> $tmp_file && diff $1 $tmp_file
}

SUCCESSES_NUM=0
FAILURES_NUM=0


FAILURES=()

run_test () {
    echo -e "Running: $@"

    if $@ ; then
        echo -e "\033[32msuccess\033[0m\n"
        SUCCESSES_NUM=$(($SUCCESSES_NUM+1))
    else
        echo -e "\033[31mfail\033[0m (with exit code $?)\n"
        FAILURES_NUM=$(($FAILURES_NUM+1))
        FAILURES+=("$@")
    fi
}

run_tests() {
    for file in "$@"
    do
        if [ -f "$file" ] ; then
            filename=$(basename -- "$file")
            extension="${filename##*.}"
            if [ "$extension" = "self" ] ; then
                run_test self_test "$file"
            elif [ "$extension" = "sh" ] ; then
                run_test "$file"
            else
                echo "Ignore '$file' because of not matching extension"
                echo
            fi
        elif [ -d "$file" ] ; then
            run_tests "$file"/*
        else
            echo "file: $file seems to not be file or directory"
        fi
    done
}

# exit on ctrl+c
trap "exit 4" INT

# make sure solution is up to date
echo "Updating solution..."
make
echo

# close fds which are guaranteed to be closed
for i in {20..1023}
do
    eval "exec $i<&-"
done

if [ "$#" = 0 ] ; then
    # run all tests if none are specified
    run_tests "tests"
else
    run_tests "$@"
fi

TOTAL_NUM=$(($FAILURES_NUM+$SUCCESSES_NUM))
echo -e "\n$TOTAL_NUM tests in total, from which"
if (($FAILURES_NUM == 0)) ; then
    echo -e "\e[92m$SUCCESSES_NUM succeeded\e[39m and"
    echo -e "$FAILURES_NUM failed."
else
    echo -e "$SUCCESSES_NUM succeeded and"
    echo -e "\e[91m$FAILURES_NUM failed\e[39m."
    echo
    echo -e "\e[91mFailures:"
    for failed in ${FAILURES[*]}; do
        if [ $failed != "self_test" ] ; then
            echo $failed
        fi
    done
    echo -e "\e[39m"
fi