test tox with py39 on Github Actions CI

Author: basnijholt

.github/workflows/tox.yml

@@ -0,0 +1,28 @@
+name: Python package
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  build:
+    runs-on: ${{ matrix.platform }}
+    strategy:
+      matrix:
+        platform: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: [3.6, 3.7, 3.8, 3.9]
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install tox tox-gh-actions
+    - name: Test with tox
+      run: tox
+      env:
+        PLATFORM: ${{ matrix.platform }}

tox.ini

@@ -1,7 +1,20 @@
 
 [tox]
 isolated_build = True
-envlist = clean,py{36,37,38}-{mindeps,alldeps},report,pre-commit
+envlist = clean,py{36,37,38,39}-{mindeps,alldeps},report,pre-commit
+
+[gh-actions]
+python =
+    3.6: py36-mindeps, py36-alldeps
+    3.7: py37-mindeps, py37-alldeps, report
+    3.8: py38-mindeps, py38-alldeps
+    3.9: py39-mindeps, py39-alldeps
+
+[gh-actions:env]
+PLATFORM =
+    ubuntu-latest: linux
+    macos-latest: macos
+    windows-latest: windows
 
 [pytest]
 testpaths = adaptive