Expand CI coverage for Python compatibility

Author: ly

.github/workflows/ci.yml

@@ -21,6 +21,8 @@ jobs:
           - ubuntu-latest
           - macos-latest
         python-version:
+          - "3.9"
+          - "3.10"
           - "3.11"
 
     steps:
@@ -32,6 +34,10 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
+      - name: Install tomli for Python < 3.11
+        if: ${{ matrix.python-version != '3.11' }}
+        run: python3 -m pip install tomli
+
       - name: Run unit tests
         run: python3 -m unittest discover -s tests -p 'test*.py' -v
 

tests/test_project_contracts.py

@@ -99,6 +99,12 @@ def test_ci_workflow_runs_full_unittest_suite(self):
         self.assertIn("workflow_dispatch:", content)
         self.assertIn("ubuntu-latest", content)
         self.assertIn("macos-latest", content)
+        self.assertIn('- "3.9"', content)
+        self.assertIn('- "3.10"', content)
+        self.assertIn('- "3.11"', content)
+        self.assertIn("Install tomli for Python < 3.11", content)
+        self.assertIn("matrix.python-version != '3.11'", content)
+        self.assertIn("python3 -m pip install tomli", content)
         self.assertIn("python3 -m unittest discover -s tests -p 'test*.py' -v", content)
         self.assertIn("Run smoke validation", content)
         self.assertTrue("make smoke" in content or "./scripts/ci-smoke.sh" in content)