Simplify macOS CI workflow (no need for indirection / extra scripts) (#…

…313)

.github/workflows/macos.yaml

@@ -31,8 +31,6 @@ on:
 jobs:
   ci:
     runs-on: macos-latest
-    env:
-      PY_VERSION: "${{ matrix.python-version }}"
     strategy:
       matrix:
         python-version:
@@ -58,8 +56,35 @@ jobs:
           brew unlink gcc
           brew link gcc
 
-      - name: Run "install" to setup Python environment and tooling
-        run: scripts/macos/setup.sh
+      - name: Show Python version
+        run: |
+          python --version
+
+      - name: Update host Python packaging
+        run: |
+          python -m pip install --upgrade "cmake >= 3.25.2" "nox >= 2022.11.21" numpy pip
+
+      - name: Unit tests in Python 3.9
+        if: matrix.python-version == '3.9'
+        run: |
+          nox --session unit-3.9
+
+      - name: Unit tests in Python 3.10
+        if: matrix.python-version == '3.10'
+        run: |
+          nox --session unit-3.10
+
+      - name: Unit tests AND line coverage in Python 3.11
+        if: matrix.python-version == '3.11'
+        run: |
+          nox --session cover
 
-      - name: Run tests
-        run: scripts/macos/test.sh
+      - name: Functional tests in Python 3.11
+        if: matrix.python-version == '3.11'
+        run: |
+          nox --session functional-3.11
+
+      - name: Run all doctests
+        if: matrix.python-version == '3.11'
+        run: |
+          nox --session doctest