add SendUsrChk and test it

Makefile

@@ -1,4 +1,4 @@
-.PHONY: run install-wireshark-dissector
+.PHONY: run install-wireshark-dissector test
 
 bundle.js: asd.js func_replacements.js
 	~/node_modules/.bin/frida-compile -o $@ asd.js
@@ -11,6 +11,12 @@ venv: requirements.txt
 run: bundle.js venv
 	./venv/bin/python3 -u loader3.py
 
+node_modules:
+	npm install
+
+test: node_modules
+	./node_modules/.bin/mocha --require ts-node/register  tests/fn.test.js
+
 install-wireshark-dissector:
 	mkdir -p ~/.local/lib/wireshark/plugins
 	ln -s $(PWD)/dissector.lua ~/.local/lib/wireshark/plugins/dissector.lua