added unittest for constrain function #2

	name: Test

	on: [push, pull_request]

	jobs:
	markdownlint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: DavidAnson/markdownlint-cli2-action@v14
	with:
	globs: \|
	README.md
	CHANGELOG.md
	docs/*.md

	pylint:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.7", "3.9", "3.12"]
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v3
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install pylint
	pip install gpiozero
	pip install RPi.GPIO
	pip install Mock.GPIO
	pip install mock
	pip install pyserial
	- name: Analysing the code with pylint
	run: \|
	pylint $(git ls-files '*.py') --disable=C0103 --disable=W0511 --extension-pkg-whitelist=RPi

	unittest:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.7", "3.9", "3.12"]
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v3
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install gpiozero
	pip install RPi.GPIO
	pip install Mock.GPIO
	pip install pyserial
	- name: Run unittests
	run: \|
	python -m unittest

Provide feedback