Since university programming assignments often require "input/output" type of programming, I have made this simple script to run any number of input/output tests on a Java program.

javatest.sh

#!/bin/bash

# this script will run input/output tests for java programs
USAGE="Usage:

javatest.sh <progpath> <inputs_folder_path> <expected_outputs_folder_path>	

The names of the input files is expected to be the same as the name of the corresponding expected output files."

if [[ $# != 3 ]]; then
	echo "$USAGE"
	exit
fi

PROGRAM=$1
INPUTS=$2
EXPECTED=$3

passed=0
total=$(ls $INPUTS | wc -l)
failed_tests=""
for file in $(ls $INPUTS); do
	inputfile="$INPUTS/$file"
	expectedfile="$EXPECTED/$file"
	echo "Running test '$file'"
	output=$(java $PROGRAM $(cat $inputfile))
	retcode=$?
	if [[ $retcode != 0 ]]; then
		echo "Program returned code $retcode"
		continue
	fi
	if [[ $output == $(cat $expectedfile) ]]; then
		passed=$((passed+1))
	else
		failed_tests="${failed_tests}Test $file failed.\nGot      '$output'\nExpected '$(cat $expectedfile)'\n\n"
	fi
done

echo
echo
echo -e "$failed_tests"
echo "$passed of $total tests passed."