#!/bin/bash

SCRIPT=`realpath -s "$0"`
SCRIPTPATH=`dirname "$SCRIPT"`
PATH="$SCRIPTPATH:$PATH"

cp "$SCRIPTPATH/test/file.out" "$SCRIPTPATH/test/file_same.out"
mkdir -p "$SCRIPTPATH/test/results"

# diff file.out against file_$1.out, also strip out timestamps & file paths
function create_result()
{
	diff -dU2 -w "$SCRIPTPATH/test/file.out" "$SCRIPTPATH/test/file_$1.out" \
		| sed -E 's/^(\+\+\+|---).+\/([^/]+)\t.+$/\1 \2/' \
		> "$SCRIPTPATH/test/results/$1.out"
}

# compare whether result is same as expected
function check_result()
{
	cmp -s "$SCRIPTPATH/test/expected/$1.out" "$SCRIPTPATH/test/results/$1.out"
	if test $? -ne 0
	then
		diff -u "$SCRIPTPATH/test/expected/$1.out" "$SCRIPTPATH/test/results/$1.out"
		exit 1
	fi
}

function test_case()
{
	# call twice as tests invoke diff multiple times
	create_result "$1"
	create_result "$1"
	check_result "$1"
}

test_case "same"
test_case "different"