Added testing and linting instructions, plus a missing test dependency

README.md

@@ -49,3 +49,35 @@ Download the latest release in .tar.gz or .whl format and simply use pip install
 ```sh
 pip install PyCTBN-2.2.tar.gz
 ```
+
+## Testing & Linting
+
+Install these dependencies for **tesing**:
+
+```sh
+pip3 install -r test-requirements.txt
+```
+
+Install these dependencies for **linting**:
+
+```sh
+pip3 install -r lint-requirements.txt
+```
+
+To launch **pytest**:
+
+```sh
+pytest
+```
+
+To launch **flake8**:
+
+```sh
+flake8
+```
+
+To launch **pylint**:
+
+```sh
+pylint --output-format=text --rcfile=setup.cfg src/ test/ *.py
+```

test-requirements.txt

@@ -2,3 +2,4 @@ pytest-xdist==2.2.1
 setuptools==54.1.2
 pytest==6.2.2
 pytest-cov==2.11.1
+psutil==5.9.0