ci(pytest.yml): extend scope to Windows and MacOS

The scope of the automated pytest checks is extended to equally
consider Windows 2022 and MacOS 14.  At present, these are the
most recent OS images of Windows, or MacOS, respectively.

Signed-off-by: Norwid Behrnd <nbehrnd@yahoo.com>

.github/workflows/pytest.yml

@@ -3,7 +3,7 @@ name: CI_pytest_appendfilename
 # name    : pytest.yml
 # purpose : regularly run pytest on appendfilename
 # date    : [2024-10-31 Thu]
-# edit    :
+# edit    : [2024-10-31 Thu]
 
 on:
   push:
@@ -17,7 +17,7 @@ on:
     # - cron: "0 0 1 * *"  # once each 1st of a month, at 00:00 UTC (cf. https://crontab.guru/)
 
 jobs:
-  test-ubuntu:
+  test-ubuntu-2404:
     runs-on: ubuntu-24.04
     timeout-minutes: 2
 
@@ -35,3 +35,41 @@ jobs:
 
       - name: run the check by pytest
         run: python -m pytest
+
+  test-windows-2022:
+    runs-on: windows-2022
+    timeout-minutes: 2
+
+    steps:
+      - uses: actions/checkout@v4
+        # by [2024-10-23 Wed], this version possibly will be considered "old", cf.
+        # https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.x'
+
+      - name: Install dependencies with PyPI
+        run: pip install -r requirements.txt
+
+      - name: run the check by pytest
+        run: python -m pytest
+
+  test-macos-14
+    runs-on: macos-14
+    timeout-minutes: 2
+
+    steps:
+      - uses: actions/checkout@v4
+        # by [2024-10-23 Wed], this version possibly will be considered "old", cf.
+        # https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.x'
+
+      - name: Install dependencies with PyPI
+        run: pip install -r requirements.txt
+
+      - name: run the check by pytest
+        run: python -m pytest