feat: Added comprehensive unit testing and github action to run tests on new pull requests

.github/workflows/tests.yml

@@ -0,0 +1,44 @@
+name: Tests and Linting
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.14.2"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+          pip install -e ".[dev]"
+      - name: Run unit tests with coverage
+        run: |
+          pytest -m "not integration and not slow" --cov=main --cov-report=term-missing --cov-fail-under=80
+      - name: Run all tests
+        run: |
+          pytest --cov=main --cov-report=xml --cov-report=html
+      - name: Upload coverage reports
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage-reports
+          path: |
+            htmlcov/
+            coverage.xml
+
+  integration-test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install docker-compose
+        run: sudo apt update && sudo apt install -y docker-compose
+      - name: Run integration test with docker-compose
+        run: docker-compose up --build --abort-on-container-exit --exit-code-from github-etl
+      - name: Cleanup
+        if: always()
+        run: docker-compose down -v

Dockerfile

@@ -1,5 +1,5 @@
 # Use the latest stable Python image
-FROM python:3.11-slim
+FROM python:3.14.2-slim
 
 # Set environment variables
 ENV PYTHONDONTWRITEBYTECODE=1 \
@@ -34,4 +34,4 @@ RUN chown -R app:app /app
 USER app
 
 # Set the default command
-CMD ["python", "main.py"]
+CMD ["python", "main.py"]

Dockerfile.mock

@@ -1,5 +1,5 @@
 # Dockerfile for mock GitHub API service
-FROM python:3.11-slim
+FROM python:3.14.2-slim
 
 WORKDIR /app
 

README.md

@@ -66,7 +66,7 @@ docker run --rm \
 
 ### Container Specifications
 
-- **Base Image**: `python:3.11-slim` (latest stable Python)
+- **Base Image**: `python:3.14.2-slim` (latest stable Python)
 - **User**: `app` (uid: 1000, gid: 1000)
 - **Working Directory**: `/app`
 - **Ownership**: All files in `/app` are owned by the `app` user