Add simple smoke/integration tests

Author: dcermak

.github/workflows/ci.yml

@@ -30,9 +30,38 @@ jobs:
           poetry install
           poetry run ruff format --check --diff .
 
+  tests:
+    name: Run the integration/smoke tests
+    runs-on: "ubuntu-latest"
+    strategy:
+      fail-fast: false
+      matrix:
+        python_version: ["3.9", "3.10", "3.11", "3.12"]
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python_version }}
+      - uses: actions/cache@v4
+        with:
+          path: ~/.cache/pypoetry/virtualenvs
+          key: poetry-${{ hashFiles('poetry.lock') }}
+
+      - run: sudo pipx install poetry
+        env:
+          PIPX_BIN_DIR: /usr/bin
+
+      - name: Install dependencies
+        run: poetry install
+
+      - name: Run the tests
+        run: poetry run pytest -vv
+
   build:
     name: Build the package
     runs-on: ubuntu-latest
+    needs: tests
 
     steps:
       - uses: actions/checkout@v4