workflows: run tests on windows (bug 1797128)

WIP

.github/workflows/test.yml

@@ -0,0 +1,27 @@
+name: Build and test on Windows
+
+on:
+  pull_request:
+    branches:
+        - main
+
+jobs:
+  test:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          persist-credentials: false
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.10"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          # This probably will not work on Windows, but worth a try.
+          python -m pip install -r requirements/requirements-3.10-Windows.txt
+          python -m pip install -e .
+      - name: Run tests
+        run: |
+          python -m pytest -vvv