Add new action for running pytests.

.github/workflows/test.yaml

@@ -0,0 +1,31 @@
+name: Run tests
+
+on:
+  push:
+    branches: [ '*' ]
+  pull_request:
+    branches: [ '*' ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        python-version: [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: ${{ matrix.python-version }}
+    - name: Install Poetry
+      run: |
+        curl -sSL https://install.python-poetry.org | python3 -
+        echo "$HOME/.poetry/bin" >> $GITHUB_PATH
+    - name: Install dependencies
+      run: poetry install
+    - name: Test with pytest
+      run: poetry run pytest