Add .github/workflows

.github/workflows/tests.yml

@@ -0,0 +1,53 @@
+name: Tests
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: [3.5, 3.6, 3.7, 3.8, 3.9.0, 3.10.0-alpha.3, pypy3]
+        os: [ubuntu-18.04, macos-latest, windows-latest]
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Get pip cache dir
+        id: pip-cache
+        run: |
+          python -m pip install --upgrade "pip>=20.1"
+          echo "::set-output name=dir::$(pip cache dir)"
+
+      - name: Cache pip
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.pip-cache.outputs.dir }}
+          key: ${{ matrix.os }}-${{ matrix.python-version }}-pip-${{ hashFiles('**/requirements.txt') }}
+          restore-keys: |
+            ${{ matrix.os }}-${{ matrix.python-version }}-pip-
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade tox
+
+      - name: Run tox
+        run: |
+          tox -e cov
+        env:
+          PYTEST_DISCORD_WEBHOOK: ${{ secrets.PYTEST_DISCORD_WEBHOOK }}
+
+      - name: Coverage report
+        run: |
+          python -m pip install --upgrade codecov coveralls
+          codecov
+          coveralls
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        if: matrix.os == 'ubuntu-18.04' && matrix.python-version == '3.8'