add gha for running pytest

.github/workflows/test-code.yml

@@ -0,0 +1,25 @@
+name: test-code
+on: [push, pull_request]
+
+# Cancel if a newer run is started
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  # Use pytest to run tests
+  pytest:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install pytest
+      - name: pytest --> Run tests
+        run: pytest .