ci: Test macOS arm64 wheels on self-hosted runners

.github/workflows/build.yml

@@ -65,13 +65,10 @@ jobs:
           - { wheel: cp312-macosx_x86_64,    os: macos-latest   }
           - { wheel: cp312-manylinux_x86_64, os: ubuntu-latest  }
           - { wheel: cp312-win_amd64,        os: windows-latest }
-
           - { wheel: pp39-manylinux_x86_64,  os: ubuntu-latest  }
-
           # Currently broken with PyPy 7.3? See https://foss.heptapod.net/pypy/pypy/-/issues/4013.
           # - { wheel: pp39-macosx_x86_64,     os: macos-latest   }
           # - { wheel: pp39-win_amd64,         os: windows-latest }
-
     steps:
       - name: Download source distribution
         uses: actions/download-artifact@v3
@@ -92,9 +89,42 @@ jobs:
           CIBW_BUILD_VERBOSITY: 1
       - uses: actions/upload-artifact@v3
         with:
-          name: wheels
+          name: ${{ matrix.wheel }}
           path: ./wheelhouse/*.whl
 
+  test_macos_arm64_wheels:
+    needs: build_wheels
+    name: Test ${{ matrix.wheel }} macOS ARM64 wheel
+    runs-on: [macOS, ARM64]
+    strategy:
+      matrix:
+        include:
+          - { wheel: cp310-macosx_arm64, python: '3.10' }
+          - { wheel: cp311-macosx_arm64, python: '3.11' }
+          - { wheel: cp312-macosx_arm64, python: '3.12' }
+          # Not supported by setup-python for the self-hosted runner:
+          #   Error: The version '3.9' with architecture 'arm64' was not found for macOS 13.6.
+          # - { wheel: cp38-macosx_arm64,  python: '3.8' }
+          # - { wheel: cp39-macosx_arm64,  python: '3.9' }
+    steps:
+      - run: rm -rf dist
+      - uses: actions/download-artifact@v3
+        with:
+          name: source
+          path: dist
+      - uses: actions/download-artifact@v3
+        with:
+          name: ${{ matrix.wheel }}
+          path: dist
+      - uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python }}
+      - run: |
+          pip install --force-reinstall ./dist/*.whl
+          tar xvf ./dist/pypcode-*.tar.gz
+          cd pypcode-*/tests
+          python -m unittest discover -v -s .
+
   build_docs:
     name: Build docs
     runs-on: ubuntu-latest
@@ -109,19 +139,17 @@ jobs:
 
   upload_pypi:
     name: Upload wheels to PyPI
-    needs: [lint, build_docs, build_sdist, build_wheels]
+    needs: [lint, build_docs, build_sdist, build_wheels, test_macos_arm64_wheels]
     runs-on: ubuntu-latest
-    # upload to PyPI on every tag starting with 'v'
+    # Upload to PyPI on every tag starting with 'v'
     if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags/v')
     steps:
       - uses: actions/download-artifact@v3
         with:
-          name: source
-          path: dist
-      - uses: actions/download-artifact@v3
-        with:
-          name: wheels
-          path: dist
+          path: artifacts
+      - run: |
+          mkdir dist
+          find artifacts -type f -exec mv {} dist \;
       - uses: pypa/gh-action-pypi-publish@release/v1
         with:
           user: __token__