Sandbox: Enable mypy type checker #416

	name: "Tests"

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

	# Cancel redundant in-progress jobs.
	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	test:
	name: "Python ${{ matrix.python-version }} on ${{ matrix.os }}"
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	os: [
	"ubuntu-20.04",
	"macos-12",
	"macos-latest",
	"windows-latest",
	]
	python-version: [
	"3.6",
	"3.7",
	"3.8",
	"3.9",
	"3.10",
	"3.11",
	"3.12",
	"3.13",
	"pypy3.10",
	]

	exclude:

	# Exclude test matrix slots that are no longer supported by GHA runners.
	- os: 'macos-latest'
	python-version: '3.6'
	- os: 'macos-latest'
	python-version: '3.7'

	# Exclude Python 3.7 on Windows, because GHA fails on it.
	#
	# SyntaxError: Non-UTF-8 code starting with '\x83' in file
	# C:\hostedtoolcache\windows\Python\3.7.9\x64\Scripts\poe.exe
	# on line 2, but no encoding declared;
	# see http://python.org/dev/peps/pep-0263/ for details
	#
	# https://github.com/kennethreitz/responder/actions/runs/11526258626/job/32090071392?pr=546#step:6:73
	- os: 'windows-latest'
	python-version: '3.7'

	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- uses: yezz123/setup-uv@v4

	- name: Install package and run software tests (Python 3.6)
	if: matrix.python-version == '3.6'
	run: \|
	pip install '.[graphql,develop,test]'
	poe test

	- name: Install and completely validate package (Python >=3.6)
	if: matrix.python-version != '3.6'
	run: \|
	uv pip install '.[graphql,develop,test]' --system
	poe check

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