improve unit test and code coverage #21

	name: pr
	on:
	pull_request:
	branches: [ "main" ]

	jobs:
	pre-commit:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	- uses: pre-commit/action@v3.0.1

	DCO-check:
	runs-on: ubuntu-latest
	steps:
	- name: get pr commits
	id: 'get-pr-commits'
	uses: tim-actions/get-pr-commits@v1.3.1
	with:
	token: ${{ secrets.GITHUB_TOKEN }}

	- name: DCO check
	uses: tim-actions/dco@master
	with:
	commits: ${{ steps.get-pr-commits.outputs.commits }}

	- name: check subject line length
	uses: tim-actions/commit-message-checker-with-regex@v0.3.2
	with:
	commits: ${{ steps.get-pr-commits.outputs.commits }}
	pattern: '^.{0,72}(\n.)$'
	error: 'Subject too long (max 72)'

	codespell:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: codespell-project/actions-codespell@master
	with:
	check_filenames: true
	ignore_words_list: crate

	validate:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- run: make validate

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