add windows test to ci (#8761)

Co-authored-by: b1tg <[email protected]>

.github/workflows/test.yml

@@ -619,6 +619,44 @@ jobs:
         if: matrix.backend=='amd'
         run: python -m pytest -n=auto test/test_hcq.py test/test_tiny.py --durations=20
 
+  wintests:
+    strategy:
+      fail-fast: false
+      matrix:
+        backend: [llvm]
+
+    name: Tests on Windows (${{ matrix.backend }})
+    runs-on: windows-latest
+    timeout-minutes: 45
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 2 # NOTE: this fetches the HEAD commit of the PR
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v5
+        with:
+          python-version: 3.12
+      - name: Cache python packages
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.Python3_ROOT_DIR }}\Lib\site-packages
+          key: windows-${{ matrix.backend }}-packages-${{ hashFiles('**/setup.py') }}
+      - name: Install dependencies
+        run: pip install --user -e '.[testing]' --extra-index-url https://download.pytorch.org/whl/cpu
+      - name: Check Device.DEFAULT and print some source
+        env:
+          DEBUG: 5
+          LLVM: 1
+          PYTHONPATH: ${{ github.workspace }}
+        run: |
+          python3 test/test_ops.py TestOps.test_add
+      - name: Run pytest
+        env:
+          DEBUG: 5
+          LLVM: 1
+        run: python -m pytest -n=auto test/test_tiny.py --durations=20
+
   #testunicorn:
   #  name: ARM64 unicorn Test
   #  runs-on: ubuntu-latest