Work around mypy's inference of email.message types #29

	# Copyright 2023 Google LLC
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# https://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
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	on:
	push: {}
	schedule:
	- cron: '27 22 * * 4'

	jobs:
	test:
	strategy:
	matrix:
	python-version:
	- '3.11'
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Install system dependencies
	run: \|
	# TODO(dseomn): Install protobuf-compiler from the system repos once the
	# version there is new enough to work with the version of protobuf from
	# pypi: https://protobuf.dev/news/2022-05-06/#python-updates
	curl \
	--location \
	-o protoc.zip \
	https://github.com/protocolbuffers/protobuf/releases/download/v24.3/protoc-24.3-linux-x86_64.zip
	sudo unzip protoc.zip -d /usr/local
	- uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install Python dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements.txt
	- name: Build
	run: \|
	python setup.py build
	- name: Check formatting
	run: \|
	pip install black
	black --check --diff .
	- name: Test
	run: \|
	pip install pytest pytest-cov
	pytest

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