ci(tests): Use poetry cache action

[tony]

Potential bug (as of actions/setup-python v3.1):

Filed a report here: actions/setup-python#374, reproduction: https://github.com/tony/setup-python-poetry-version-example

The workaround for now is to use poetry env use <python-version>beforepoetry install

Original message

As of yesterday, @actions/setup-python@v3 supports this via v3.1.0: Release, Tag, actions/setup-python#281

steps:
- uses: actions/checkout@v3
- name: Install poetryrun: pipx install poetry
- uses: actions/setup-python@v3with:
python-version: '3.9'cache: 'poetry'
- run: poetry install
- run: poetry run pytest

See also: python-poetry/poetry#4205

[codecov]

Codecov Report

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=======================================
Coverage 86.80% 86.80% =======================================
Files 15 15 Lines 879 879 =======================================
Hits 763 763 Misses 116 116 

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[tony]

Update (as of actions/setup-python):

When I do this, I've found I had to run poetry env ${{ matrix.python-version }} before poetry install or else it'd use the default python version:

name: testson: [push]jobs:
build:
runs-on: ubuntu-lateststrategy:
matrix:
python-version: [ '3.10' ]steps:
- uses: actions/checkout@v3
- name: Install poetryrun: | curl -O -sSL https://install.python-poetry.org/install-poetry.py python install-poetry.py -y --version 1.1.12 echo "PATH=${HOME}/.poetry/bin:${PATH}" >> $GITHUB_ENV rm install-poetry.py - name: Set up Python ${{ matrix.python-version }}uses: actions/setup-python@v3with:
python-version: ${{ matrix.python-version }}cache: 'poetry'
- name: Install dependenciesrun: | # This is required to do as of @actions/checkout@v3 to prevent default action python (3.8) from being used poetry env use ${{ matrix.python-version }} poetry install - name: Lint with flake8run: poetry run flake8
- name: Print python versionsrun: | python -V poetry run python -V - name: Test with pytestrun: poetry run py.test