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.github/workflows/test-and-lint.yml

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+name: Test and lint
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7, 3.8, 3.9.0-rc.2]
+      fail-fast: false
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Cache dependencies
+      uses: actions/cache@v1
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('requirements.txt') }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+    - name: Lint with flake8
+      run: |
+        flake8 --version
+        flake8 --show-source --statistics asserts test_asserts.py
+    - name: Type checking with mypy
+      run: |
+        mypy --version
+        mypy asserts test_asserts.py
+    - name: Test with unittest
+      run: python -Wall -m unittest test_asserts
+    - name: Run doctests
+      run: python -m doctest asserts/__init__.py