feat(lab03): add CI and badge

Author: ostxxp

.github/workflows/python-ci.yml

@@ -0,0 +1,73 @@
+name: Python CI (Lab03)
+
+on:
+  push:
+    branches: [ "main", "master", "lab3", "lab03" ]
+    paths:
+      - "app_python/**"
+      - ".github/workflows/python-ci.yml"
+  pull_request:
+    paths:
+      - "app_python/**"
+      - ".github/workflows/python-ci.yml"
+
+concurrency:
+  group: python-ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test-lint:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: app_python
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+          cache: "pip"
+          cache-dependency-path: "app_python/requirements.txt"
+
+      - name: Install deps
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: Lint (ruff)
+        run: ruff check .
+
+      - name: Tests
+        run: pytest -q
+
+  docker-build-push:
+    needs: test-lint
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && (github.ref_name == 'main' || github.ref_name == 'master' || github.ref_name == 'lab3' || github.ref_name == 'lab03')
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set version (CalVer)
+        run: |
+          echo "CALVER=$(date +%Y.%m)" >> $GITHUB_ENV
+          echo "BUILD=${{ github.run_number }}" >> $GITHUB_ENV
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Build & Push
+        uses: docker/build-push-action@v6
+        with:
+          context: ./app_python
+          file: ./app_python/Dockerfile
+          push: true
+          tags: |
+            ${{ secrets.DOCKER_USERNAME }}/devops-info-service:${{ env.CALVER }}.${{ env.BUILD }}
+            ${{ secrets.DOCKER_USERNAME }}/devops-info-service:latest

app_python/README.md

@@ -1,4 +1,6 @@
-# DevOps Info Service (Lab 01)
+![CI](https://github.com/ostxxp/DevOps-Core-Course/actions/workflows/python-ci.yml/badge.svg)
+
+# DevOps Info Service (Labs 01–03)
 
 ## Overview
 Simple web service that returns service, system, runtime and request information.

app_python/requirements.txt

@@ -1 +1,4 @@
-Flask==3.1.0
+Flask==3.1.0
+pytest
+pytest-cov
+ruff

app_python/tests/conftest.py

@@ -0,0 +1,5 @@
+import os
+import sys
+
+# add app_python/ to import path so "import app" works
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))

app_python/tests/test_api.py

@@ -0,0 +1,53 @@
+import pytest
+from app import app
+
+
+@pytest.fixture
+def client():
+    app.config["TESTING"] = True
+    with app.test_client() as c:
+        yield c
+
+
+def test_root_ok_and_structure(client):
+    r = client.get("/")
+    assert r.status_code == 200
+
+    data = r.get_json()
+    assert isinstance(data, dict)
+
+    # service
+    assert "service" in data
+    assert data["service"]["framework"] == "Flask"
+
+    # system
+    assert "system" in data
+    assert "hostname" in data["system"]
+    assert "python_version" in data["system"]
+
+    # runtime
+    assert "runtime" in data
+    assert "uptime_seconds" in data["runtime"]
+    assert "current_time" in data["runtime"]
+
+    # endpoints
+    assert "endpoints" in data
+    assert isinstance(data["endpoints"], list)
+
+
+def test_health_ok_and_structure(client):
+    r = client.get("/health")
+    assert r.status_code == 200
+
+    data = r.get_json()
+    assert isinstance(data, dict)
+    assert data["status"] == "healthy"
+    assert "timestamp" in data
+    assert "uptime_seconds" in data
+
+
+def test_404_json(client):
+    r = client.get("/nope")
+    assert r.status_code == 404
+    data = r.get_json()
+    assert data["error"] == "Not Found"