#!/bin/bash
set -euo pipefail

IMAGE="$1"
FAILED=0
PASSED=0

TMPDIR="$(mktemp -d)"
trap 'rm -rf "$TMPDIR"' EXIT

docker run --rm --entrypoint /usr/bin/unrar "$IMAGE" > "$TMPDIR/output" 2>&1; RC=$?

if grep -qiE "unrar|usage" "$TMPDIR/output"; then
  echo "PASS: unrar prints usage info"
  PASSED=$((PASSED + 1))
else
  echo "FAIL: unrar output unrecognized"
  FAILED=$((FAILED + 1))
fi

# unrar displays help on stderr in some versions, check there too
docker run --rm --entrypoint /usr/bin/unrar "$IMAGE" 2> "$TMPDIR/stderr" 1>/dev/null; :

if grep -qiE "unrar|usage" "$TMPDIR/stderr"; then
  echo "PASS: unrar stderr contains usage info"
  PASSED=$((PASSED + 1))
else
  echo "FAIL: unrar stderr unrecognized"
  FAILED=$((FAILED + 1))
fi

echo ""
echo "$PASSED/$((PASSED + FAILED)) tests passed"
if [ "$FAILED" -gt 0 ]; then
  exit 1
fi