First product

tests/unit/test_healthz.py

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+from unittest.mock import AsyncMock
+
+from fastapi.testclient import TestClient
+
+from app.main import app
+
+
+def test_healthz_returns_200_when_database_is_available(monkeypatch) -> None:
+    monkeypatch.setattr("app.web.routers.health.check_database", AsyncMock(return_value=True))
+    client = TestClient(app)
+
+    response = client.get("/healthz")
+
+    assert response.status_code == 200
+    assert response.json() == {"status": "ok"}
+
+
+def test_healthz_returns_500_when_database_is_unavailable(monkeypatch) -> None:
+    monkeypatch.setattr("app.web.routers.health.check_database", AsyncMock(return_value=False))
+    client = TestClient(app)
+
+    response = client.get("/healthz")
+
+    assert response.status_code == 500
+    assert response.json()["detail"] == "database unavailable"