feat(gha): use tox environments

.github/workflows/testing.yml

@@ -9,57 +9,31 @@ env:
 jobs:
   test:
     name: Testing on
-    runs-on: ${{ matrix.os }}
+    runs-on: "ubuntu-latest"
     strategy:
       matrix:
         python-version: ["3.12", "3.11", "3.10", 3.9, 3.8, pypy-3.9]
-        os: ["ubuntu-22.04"]
-        include:
-          - os: "ubuntu-latest"
-            python-version: 3.11
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Cache packages
-        uses: actions/cache@v3
-        with:
-          path: ~/.cache/pip
-          key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('requirements.txt') }}
-          restore-keys: |
-            ${{ runner.os }}-pip-${{ matrix.python-version }}-
-      - name: pip version
-        run: pip --version
-      - name: Install dependencies
-        if: matrix.python-version == '3.9'
-        run: python -m pip install -r requirements-lint.txt
       - name: Install dependencies
-        if: matrix.python-version != '3.9'
-        run: python -m pip install -r requirements.txt
-      # formatters
-      - name: Run pyupgrade
-        if: matrix.python-version == '3.9'
-        run: pyupgrade --py37-plus *.py
-      - name: Run isort
-        if: matrix.python-version == '3.9'
-        run: isort --check-only *.py
-      - name: Run black
-        if: matrix.python-version == '3.9'
-        run: black --check --skip-string-normalization *.py
-      # linters
-      - name: Lint with bandit
-        if: matrix.python-version == '3.9'
-        run: bandit --skip B101 *.py  # B101 is assert statements
-      - name: Lint with codespell
-        if: matrix.python-version == '3.9'
-        run: codespell *.rst *.py
-      - name: Lint with flake8
-        if: matrix.python-version == '3.9'
-        run: flake8 *.py --count --max-complexity=18 --max-line-length=88 --show-source --statistics
-      # tests and coverage
+        run: python -m pip install tox
       - name: Test
-        run: pytest run_tests.py --cov --cov-report term-missing
-      - name: Coverage
-        run: coveralls --service=github
+        run: tox -e test
+
+  lint:
+    name: Lint code
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.8"
+      - name: Install dependencies
+        run: python -m pip install tox
+      - name: Run linting
+        run: tox -e lint

tox.ini

@@ -11,7 +11,7 @@ envlist =
     py312
     pypy3
 
-[testenv]
+[testenv:test]
 description = run the distribution tests
 use_develop = true
 skip_install = false