introduce `--dry-run` mode #809

	name: Python Test

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.10", "3.11", "3.12"]
	poetry-version: ["1.4.0"]
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	id: setup-python
	with:
	python-version: ${{ matrix.python-version }}
	- name: Cache ~/.cache/pip
	uses: actions/cache@v4
	with:
	path: ~/.cache/pip
	key: python-${{ steps.setup-python.outputs.python-version }}
	- name: Cache ~/.cache/pypoetry
	uses: actions/cache@v4
	with:
	path: ~/.cache/pypoetry
	key: python-${{ steps.setup-python.outputs.python-version }}-poetry-${{ hashFiles('poetry.lock') }}
	- name: Install poetry
	uses: abatilo/actions-poetry@v3
	with:
	poetry-version: ${{ matrix.poetry-version }}
	- name: Install dependencies
	run: \|
	poetry install
	- name: Test with pytest
	run: \|
	poetry run py.test
	- name: Check formatting with black
	run: \|
	poetry run black thetagang --check --diff --color

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