done

#!/bin/bash

args=".args"
out=".out"
in=".in"


if [ $# -eq 2 ]; then
        for stem in $(cat $1); do
                if [ ! -r "$stem$out" ] || [ ! -r "$stem$out" ];then
                        echo "$stem$out does not exist" >&2
                        exit 20
                fi

                actual=$(mktemp)
                if [ -r "$stem$args" ] && [ -r "$stem$in" ];then
                        eval $2 $(cat $stem$args) < $stem$in > "$actual"
                        arguments=true
                        inputs=true
                elif [ -r "$stem$args" ]; then
                        eval $2 $(cat $stem$args) > "$actual"
                        arguments=true
                        inputs=false
                elif [ -r "$stem$in" ]; then
                        eval $2 <$stem$in > "$actual"
                        arguments=false
                        inputs=true
                else
                        eval $2 > "$actual"
                        arguments=true
                        inputs=false
                fi

                DIFF=$(diff $stem$out $actual)
                if [ "$DIFF" != "" ]; then
                        echo "Test failed:" "$stem"
                        echo "Args:"
                        if $arguments; then
                                echo "$(cat "$stem$args")"
                        fi
                        echo "Input:"
                        if $inputs; then
                                echo "$(cat "$stem$in")"
                        fi
                        echo "Expected:"
                        echo "$(cat $stem$out)"
                        echo "Actual:"
                        echo "$(cat $actual)"
                fi

                rm "$actual"
        done
else
        echo "Please enter 2 arguments" >&2
        exit 10
fi