add test workflow

.github/workflows/test.yml

@@ -0,0 +1,72 @@
+# TODO: Update to use specific commit hashes for the actions for better supply chain security.
+
+name: Run Tests
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    strategy:
+      matrix:
+        python-version: ['3.13']
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v5
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libgtk-3-dev
+
+      - name: Install Poetry
+        run: |
+          python -m pip install --upgrade pip
+          pip install poetry
+
+      - name: Configure Poetry
+        run: |
+          poetry config virtualenvs.create true
+          poetry config virtualenvs.in-project true
+
+      - name: Cache Poetry dependencies
+        uses: actions/cache@v3
+        with:
+          path: .venv
+          key: venv-${{ runner.os }}-${{ matrix.python-version }}-${{ hashFiles('**/poetry.lock') }}
+          restore-keys: |
+            venv-${{ runner.os }}-${{ matrix.python-version }}-
+
+      - name: Install dependencies
+        run: poetry install
+
+      - name: Run linting with ruff
+        run: |
+          poetry run ruff check ./ren_browser/
+          poetry run ruff check ./tests/
+
+      - name: Run tests with pytest
+        run: |
+          poetry run pytest -v --cov=ren_browser --cov-report=xml --cov-report=term
+
+      - name: Upload coverage reports
+        uses: codecov/codecov-action@v3
+        if: matrix.python-version == '3.13'
+        with:
+          file: ./coverage.xml
+          flags: unittests
+          name: codecov-umbrella
+          fail_ci_if_error: false