Add Black linting to CI

.github/workflows/test.yml

@@ -15,19 +15,30 @@ jobs:
         python-version: [ '3.5', '3.8' ]
     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
         pip install "numpy<1.19.0"
         pip install -r test_requirements.txt
         pip install pytest-cov
+
+    - name: Run Black check for formatting
+      if: ${{ matrix.python-version != '3.5' }}
+      run: |
+        # Need to manually install Black while we support Python 3.5
+        pip install black
+        black --check .
+
     - name: Test with pytest
       run: |
         pytest --cov=./ --cov-report=xml
+
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v1
       with:

setup.py

@@ -9,7 +9,9 @@
 ]
 
 TESTS_REQUIRE = [
-    'pytest'
+    'pytest',
+    # Need to manually install Black while we support Python 3.5
+    # 'black'
 ]
 
 EXTRAS_REQUIRE = {