Refactor cross-platform testing.

- Harmonize pre- and post-release testing.
- Do extensive cross-platform testing before and after release.
- Simplify continuous integration tests to only run on ubuntu-latest.

PiperOrigin-RevId: 673875278
Change-Id: I048c8cc100314470d44bb5a13238dfe50d76bb8d

.github/workflows/pypi-publish.yml

@@ -47,8 +47,20 @@ jobs:
     name: Test
     needs: build
     if: github.event_name == 'release' || inputs.run_tests
-    runs-on: ubuntu-latest
-    timeout-minutes: 60
+    runs-on: ${{ matrix.os }}
+    env:
+      SYSTEM_VERSION_COMPAT: 0  # See https://github.com/actions/setup-python/issues/279.
+    timeout-minutes: 180
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - macos-12
+          - macos-latest
+          - ubuntu-20.04
+          - ubunutu-latest
+        python-version:
+          - '3.11'
     steps:
       - name: Load artifact
         uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16
@@ -58,7 +70,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3
         with:
-          python-version: '3.11'
+          python-version: ${{ matrix.python-version }}
       - name: Install Python dependencies
         run: |
           pip install --upgrade pip

.github/workflows/pypi-test.yml

@@ -57,7 +57,8 @@ jobs:
       - name: Install Python dependencies
         run: |
           pip install --upgrade pip
-          pip install pytest-xdist setuptools
+          pip install --upgrade setuptools
+          pip install pytest-xdist
 
       - name: Install from PyPI
         run: |
@@ -66,4 +67,5 @@ jobs:
           pip list
 
       - name: Test installation
-        run: pytest --pyargs meltingpot
+        run: |
+          pytest -n auto --pyargs meltingpot

.github/workflows/test-meltingpot.yml

@@ -32,26 +32,13 @@ permissions: read-all
 jobs:
   test-meltingpot:
     name: Test Melting Pot
-    runs-on: ${{ matrix.os }}
-    env:
-      SYSTEM_VERSION_COMPAT: 0  # See https://github.com/actions/setup-python/issues/279.
-    timeout-minutes: 180
-    strategy:
-      fail-fast: ${{ github.event_name != 'workflow_dispatch' }}
-      matrix:
-        os:
-          - macos-12
-          - ubuntu-20.04
-        python-version:
-          - '3.11'
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout Melting Pot
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
 
       - name: Install Melting Pot
         uses: ./.github/actions/install-meltingpot
-        with:
-          python-version: ${{ matrix.python-version }}
 
       - name: Test Melting Pot
         run: pytest meltingpot