adding unit tests

.github/workflows/publish-to-pypi.yaml

@@ -4,9 +4,31 @@ on:
       - 'v*'
 name: publish
 jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.11'
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+        pip install pytest
+
+    - name: Run tests
+      run: |
+        pytest tests/
   build:
     name: Build distribution 📦
     runs-on: ubuntu-latest
+    needs: test
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python