response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "externalDocs": {
            "description": "External API documentation.",
            "url": "https://docs.example.com/api-general",
        },
        "paths": {
            "/api_route": {
                "get": {