tests

add how to contribute #2

	name: tests

	on:
	push:
	branches: [develop, master, main]
	pull_request:
	branches: [develop, master, main]
	workflow_dispatch:

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

	jobs:
	unit:
	name: pytest (py${{ matrix.python-version }} on ${{ matrix.os }})
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-22.04, macos-latest]
	python-version: ["3.9", "3.10", "3.11", "3.12"]
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0 # versioneer needs tags

	- uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	cache: pip

	- name: Install package + test extras
	run: \|
	python -m pip install --upgrade pip
	python -m pip install -e .[test]

	- name: Run unit tests
	run: pytest tests/unit -v

	lint:
	name: ruff + mypy
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- uses: actions/setup-python@v5
	with:
	python-version: "3.11"
	cache: pip

	- name: Install dev extras
	run: \|
	python -m pip install --upgrade pip
	python -m pip install -e .[dev]

	- name: Lint with ruff
	run: ruff check scalable tests

	- name: Type-check with mypy (lenient)
	# Lenient bootstrap; non-blocking until M-tier typing work lands.
	continue-on-error: true
	run: mypy scalable

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