test: add test for app

.github/workflows/build.yml

@@ -33,6 +33,31 @@ jobs:
       - name: Lint
         run: pylint app.py apt_info.py
 
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python 3
+        id: setup-python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.x"
+
+      - name: Prepare
+        run: |
+          sudo apt install libapt-pkg-dev
+          pip install httpx
+
+      - name: Install dependencies
+        run: pip install -r requirements.txt
+
+      - name: Test
+        run: pytest test_app.py
+
   build:
     name: Build
     runs-on: ubuntu-latest

test_app.py

@@ -0,0 +1,12 @@
+from fastapi.testclient import TestClient
+from app import app
+
+client = TestClient(app)
+
+
+def test_read_main():
+    response = client.get("/metrics")
+    assert response.status_code == 200
+    assert "# HELP" in response.text
+    assert "# TYPE" in response.text
+    assert "apt_" in response.text