"/invoices/", json={"id": "fooinvoice", "customer": "John", "total": 5.3}
    )
    assert response.status_code == 200, response.text
    assert response.json() == {"msg": "Invoice received"}


def test_dummy_callback(mod: ModuleType):
    # Just for coverage
    mod.invoice_notification({})


def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")