Run tox tests in parallel

Author: zerolab

.github/workflows/ci.yml

@@ -60,7 +60,7 @@ jobs:
         run: python -Im flit build --format wheel
 
       - name: 🧪 Run tox targets for Python ${{ matrix.python-version }}
-        run: tox --installpkg ./dist/*.whl
+        run: tox --installpkg ./dist/*.whl -- -v 1
 
       - name: ⬆️ Upload coverage data
         uses: actions/upload-artifact@v3
@@ -90,6 +90,7 @@ jobs:
 
       - name: ＋ Generate report
         run: |
+          python -Im coverage combine
           python -Im coverage html --skip-covered --skip-empty
           python -Im coverage report
           echo "## Coverage summary" >> $GITHUB_STEP_SUMMARY

tox.ini

@@ -32,10 +32,11 @@ deps =
     coverage[toml]>=7.0,<8.0
     factory-boy==3.2.1
     wagtail-factories>=4.1.0
-    django-cors-headers==3.4.0
+    django-cors-headers>=4.2.0
     wagtailmedia>=0.13
     dj-database-url==2.1.0
     psycopg2>=2.9.5,<3.0.0
+    tblib==1.7.0
 
     django32: Django>=3.2,<3.3
     django41: Django>=4.1,<4.2
@@ -48,7 +49,7 @@ deps =
 install_command = python -Im pip install -U {opts} {packages}
 
 commands =
-    python -m coverage run manage.py test {posargs: -v 2}
+    python -m coverage run --parallel-mode manage.py test --parallel {posargs: -v 2}
 
 [testenv:coverage-report]
 ; a bit of a hack - we keep deps to a minimum, and move coverage data to the tox root for easier excludes
@@ -60,6 +61,7 @@ pre_commands =
     mv {tox_root}/tests/.coverage* {tox_root}/
 
 commands =
+    python -Im coverage combine
     python -Im coverage report -m
 
 [testenv:wagtailmain]