Add unit tests cross-platform

.github/workflows/pyvespa-unit-tests.yml

@@ -0,0 +1,30 @@
+name: Unit tests - cross-platform
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - thomasht86/some-tests-to-github-action
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-12, macos-14]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -e .[dev]
+      - name: Run tests
+        run: |
+          pytest tests/unit -s -v