diff --git a/tests-ng/compare.sh b/tests-ng/compare.sh
new file mode 100755
index 0000000..1fde1dd
--- /dev/null
+++ b/tests-ng/compare.sh
@@ -0,0 +1,76 @@
+#!/usr/bin/env bash
+# author: deadc0de6 (https://github.com/deadc0de6)
+# Copyright (c) 2023, deadc0de6
+
+# exit on first error
+set -e
+
+# get current path
+rl="readlink -f"
+if ! ${rl} "${0}" >/dev/null 2>&1; then
+  rl="realpath"
+
+  if ! command -v ${rl}; then
+    echo "\"${rl}\" not found !" && exit 1
+  fi
+fi
+cur=$(dirname "$(${rl} "${0}")")
+
+# pivot
+prev="${cur}/.."
+cd "${prev}"
+
+# coverage
+#export PYTHONPATH=".:${PYTHONPATH}"
+bin="python3 -m catcli.catcli"
+if command -v coverage 2>/dev/null; then
+  bin="coverage run -p --source=catcli -m catcli.catcli"
+  #bin="coverage run -p --source=${prev}/catcli -m catcli.catcli"
+fi
+
+echo "current dir: $(pwd)"
+echo "pythonpath: ${PYTHONPATH}"
+echo "bin: ${bin}"
+${bin} --version
+
+# get the helpers
+# shellcheck source=tests-ng/helper
+source "${cur}"/helper
+echo -e "$(tput setaf 6)==> RUNNING $(basename "${BASH_SOURCE[0]}") <==$(tput sgr0)"
+
+##########################################################
+# the test
+##########################################################
+
+# create temp dirs
+tmpd=$(mktemp -d)
+clear_on_exit "${tmpd}"
+
+catalog="${tmpd}/catalog"
+
+# index
+${bin} -B index -c --catalog="${catalog}" github .github
+
+cat "${catalog}"
+echo ""
+
+# compare keys
+src="tests-ng/assets/github.catalog.json"
+src_keys="${tmpd}/src-keys"
+dst_keys="${tmpd}/dst-keys"
+cat "${src}" | jq '.. | keys?' | jq '.[]' > "${src_keys}"
+cat "${catalog}" | jq '.. | keys?' | jq '.[]' > "${dst_keys}"
+diff "${src_keys}" "${dst_keys}"
+
+# native
+native="${tmpd}/native.txt"
+${bin} -B ls -s -r --format=native --catalog="${catalog}" > "${native}"
+
+# csv
+csv="${tmpd}/csv.txt"
+${bin} -B ls -s -r --format=csv --catalog="${catalog}" > "${csv}"
+
+# the end
+echo "test \"$(basename "$0")\" success"
+cd "${cur}"
+exit 0