Add tests to GitHub Actions CI/CD workflow

.github/workflows/python-tests.yml

@@ -0,0 +1,83 @@
+name: Test suite
+
+on:
+  push:
+  pull_request:
+  schedule:
+  # Run daily at 0:01 UTC
+  # https://crontab.guru/#1_0_*_*_*
+  - cron: 1 0 * * *
+
+jobs:
+  tests:
+    name: 👷
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      # max-parallel: 5
+      matrix:
+        python-version:
+        - 3.8
+        - 2.7
+        - pypy3
+        - 3.7
+        - 3.6
+        - 3.5
+        - pypy2
+        os:
+        - ubuntu-latest
+        - ubuntu-16.04
+        - macOS-latest
+        - windows-latest
+        - windows-2016
+        env:
+        - TOXENV: python
+        tox-addargs:
+        - --use-venv -m unit
+        - --use-venv -m integration -n auto --duration=5 -k "not test_install"
+        - --use-venv -m integration -n auto --duration=5 -k "test_install"
+
+    env:
+      TOX_PARALLEL_NO_SPINNER: 1
+
+    steps:
+    - uses: actions/checkout@master
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Log Python version
+      run: >-
+        python --version
+    - name: Log Python location
+      run: >-
+        which python
+    - name: Log Python env
+      run: >-
+        python -m sysconfig
+    - name: Cache pip
+      uses: actions/cache@v1
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ hashFiles('tools/requirements/tests.txt') }}-${{ hashFiles('tools/requirements/docs.txt') }}-${{ hashFiles('tox.ini') }}
+        restore-keys: |
+          ${{ runner.os }}-pip-
+          ${{ runner.os }}-
+    - name: Install tox
+      run: >-
+        python -m pip install --upgrade tox
+    - name: 'Initialize tox envs: ${{ matrix.env.TOXENV }}'
+      run: |
+        ${{ startsWith(matrix.os, 'windows-') && 'setx TOXENV ' || 'export TOXENV=' }}${{ (startsWith(matrix.python-version, 'pypy') && matrix.python-version) || (startsWith(matrix.os, 'windows-') && '$TOXENV' || '%TOXENV%') }}
+        ${{ startsWith(matrix.os, 'macOS-') && 'pypy3' == matrix.python-version  && 'export TOXENV=pypy3' || '' }}
+        echo TOXENV="$TOXENV"
+        python -m tox --parallel auto --notest --skip-missing-interpreters false
+      env: ${{ matrix.env }}
+    - name: Test with tox
+      run: |
+        ${{ startsWith(matrix.os, 'windows-') && 'setx NETWORK_REQUIRED ' || 'export NETWORK_REQUIRED=' }}1
+        ${{ startsWith(matrix.os, 'windows-') && 'setx TOXENV ' || 'export TOXENV=' }}${{ (startsWith(matrix.python-version, 'pypy') && matrix.python-version) || (startsWith(matrix.os, 'windows-') && '$TOXENV' || '%TOXENV%') }}
+        ${{ startsWith(matrix.os, 'macOS-') && 'pypy3' == matrix.python-version  && 'export TOXENV=pypy3' || '' }}
+        echo TOXENV="$TOXENV"
+        python -m tox --parallel auto -- ${{ matrix.tox-addargs }}
+      env: ${{ matrix.env }}