check_command() {
  cmd=$1
  cmd_path=$(command -v "${cmd}")
  if [[ ! -e "${cmd_path}" ]] ; then
    echo "${cmd} does not exist."
    exit 1
  fi
}

# Get ImageMagick command (magick for v7, convert for v6)
get_imagemagick_cmd() {
  if command -v magick >/dev/null 2>&1; then
    echo "magick"
  elif command -v convert >/dev/null 2>&1; then
    echo "convert"
  else
    echo ""
  fi
}

echo "--- ImageMagick version detection tests ---"

echo -n "Testing: get_imagemagick_cmd function exists... "
if grep -q 'get_imagemagick_cmd()' "${GENERATE_THUMBNAIL}"; then
    echo -e "${GREEN}PASSED${NC}"
    ((TESTS_PASSED++))
else
    echo -e "${RED}FAILED${NC}"
    ((TESTS_FAILED++))
fi

echo -n "Testing: magick command check in get_imagemagick_cmd... "
if grep -q 'command -v magick' "${GENERATE_THUMBNAIL}"; then