Fill the test section in the README.md

README.md

@@ -33,8 +33,6 @@ And if you want `sudo dnf group install "Development Tools"`.
 
 ### On Linux systems
 
-
-
 Then just type :
 
 ```
@@ -43,7 +41,16 @@ $ make
 
 ## Tests
 
-_Not yet implemented_
+All tests are in the test folder.
+To build unittests, install [criterion](https://criterion.readthedocs.io/en/master/setup.html).
+
+Then just type :
+
+``
+$ make test
+```
+
+You can run the test by running the test/test program.
 
 ## Static analysis