tests: add regular cron test run

Author: Midnighter

.github/workflows/cron.yml

@@ -0,0 +1,48 @@
+name: Cron Test
+
+on:
+  schedule:
+  # Run every Tuesday at 11:00.
+  - cron: '0 11 * * 2'
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: [3.6, 3.7, 3.8, 3.9]
+
+    steps:
+    - uses: actions/checkout@v2
+    - 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 setuptools wheel
+        python -m pip install tox tox-gh-actions
+    - name: Check requirements with pip
+      run: python -m pip check .
+    - name: Test isort
+      run: tox -e isort
+      if: matrix.python-version == '3.6'
+    - name: Test black
+      run: tox -e black
+      if: matrix.python-version == '3.6'
+    - name: Test flake8
+      run: tox -e flake8
+      if: matrix.python-version == '3.6'
+    - name: Test docs
+      run: tox -e docs
+      if: matrix.python-version == '3.6'
+    - name: Test safety
+      run: tox -e safety
+    - name: Test suite
+      run: tox -- --cov-report=xml
+      env:
+        SECRET_WORKSPACE_ID: ${{ secrets.STRUCTURIZR_WORKSPACE_ID }}
+        SECRET_API_KEY: ${{ secrets.STRUCTURIZR_API_KEY }}
+        SECRET_API_SECRET: ${{ secrets.STRUCTURIZR_API_SECRET }}