Add checking with Black.

.github/workflows/test.yml

@@ -18,23 +18,26 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install pytest flake8
+        pip install pytest flake8 black
         pip install -r requirements.txt
     - name: Test with pytest
       run: |
         pytest -v
-    - name: Lint with flake8
+    - name: Lint with Flake8
       run: |
         flake8 --max-line-length=80 --ignore=E203,W503
-    - name: Render test
+    - name: Check code style with Black
+      run: |
+        black -l 80 --check roentgen test roentgen.py
+    - name: Test render
       run: |
         python roentgen.py render -b 37.415,55.753,37.416,55.754 --cache test/data
-    - name: Icon generation test
+    - name: Test icon generation
       run: |
         python roentgen.py icons
-    - name: MapCSS 0.2 generation test
+    - name: Test MapCSS 0.2 generation
       run: |
         python roentgen.py mapcss
-    - name: Element test
+    - name: Test element generation
       run: |
         python roentgen.py element --node amenity=bench,material=wood