Add GitHub actions for linting and automated testing

.github/workflows/lint.yml

@@ -0,0 +1,25 @@
+name: Lint
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+  merge_group:
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: 3.8
+      - name: Install dependencies
+        run: pip install black==22.12.0 isort==5.12.0 flake8==6.1.0
+      - name: Run black
+        run: black --check .
+      - name: Run isort
+        run: isort --diff --check .
+      - name: Run flake8
+        # E203: whitespace before ':', ignored by Black, non-PEP8-compliant
+        # E501: line too long, black'll take care of that
+        run: flake8 --max-line-length=88 --extend-ignore=E203,E501

.github/workflows/test.yml

@@ -0,0 +1,27 @@
+name: Test
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+  merge_group:
+jobs:
+  unit:
+    runs-on: ubuntu-latest
+    services:
+      redis:
+        image: redis
+        ports:
+          - 6399:6379
+    strategy:
+      matrix:
+        python: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python }}
+      - name: Install dependencies
+        run: pip install -r requirements-testing.txt
+      - name: Run tests
+        run: tox

tests/test_tasks.py

@@ -16,7 +16,7 @@ def test_init(self, celery_app):
         Test that task initialization sets up the necessary attributes.
         """
         task_instance = self._get_task_instance(celery_app)
-        assert task_instance._LockableTask__lock_key == f"tests.test_tasks.my_task_lock"
+        assert task_instance._LockableTask__lock_key == "tests.test_tasks.my_task_lock"
         assert task_instance._LockableTask__lock is None
 
     def test_standard_connection(self, celery_app):