add cicd workflow for tests (#4)

.github/workflows/ci-tests.yml

@@ -0,0 +1,37 @@
+# cicd workflow for running tests with pytest
+# needs to first install pdm, then install torch cpu manually and then install the package
+# then run the tests
+
+name: tests
+
+on: [push, pull_request]
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+
+      - name: Install pdm
+        run: |
+          python -m pip install pdm
+          pdm --version
+
+      - name: Install torch
+        run: |
+          python -m pip install torch==1.8.1+cpu -f https://download.pytorch.org/whl/torch_stable.html
+
+      - name: Install package (including dev dependencies)
+        run: |
+          pdm install
+          pdm install --dev
+
+      - name: Run tests
+        run: |
+          pdm run pytest --nbval-lax