Add doc on functional testing tools

.gitignore

@@ -3,3 +3,5 @@ __pycache__/
 .venv*
 *.py[o|c]
 **_build/
+geckodriver.log
+

README.rst

@@ -39,3 +39,23 @@ if pipenv is *not* installed
 
 I suggest you have pipenv installed, this projet is writtent under python 3.12 and may work on other versiona
 We have a requirement of being virtualenv compatible while i will  working with Pipenv.
+
+
+Testing
+-------
+
+Unitest should run flawlessly using make test, however functionnal testing may require some extra work.
+
+Functional testing requires *geckodriver* and *selenium* which is a driver to programatically control firefox (so one ca reproduce user behavior)
+
+.. code-block:: shell
+
+   #debian
+   sudo apt-get install firefox-geckodriver
+
+   # arch
+   sudo pacman -S geckodriver
+
+
+
+