Rust OpenAPI clients without HTTP lock-in

use generated::{
    Api, BusServiceNumber, GetBusArrivalAction,
    GetBusArrivalResponse,
};
use std::error::Error;

#[test]
fn tests_the_api_without_http() -> Result<(), Box<dyn Error>> {
    let api = Api::new().base_url("").account_key("test-key");
    let action = api
        .get_bus_arrival(83139)
        .service_no(BusServiceNumber::try_new("15")?);

    let request = action.request()?;
    assert_eq!(request.method(), http::Method::GET);
    assert_eq!(request.uri().path(), "/v3/BusArrival");
    assert_eq!(request.headers()["AccountKey"], "test-key");

    let query = request.uri().query().unwrap_or_default();
    assert!(query.contains("BusStopCode=83139"));
    assert!(query.contains("ServiceNo=15"));

    let response = GetBusArrivalAction::decode(
        satay_runtime::ResponseParts {
            status: http::StatusCode::OK,
            headers: http::HeaderMap::new(),
            body: br#"{
                "odata.metadata": "https://datamall2.mytransport.sg/ltaodataservice/v3/BusArrival",
                "BusStopCode": "83139",
                "Services": []
            }"#,
        },
    )?;

    let GetBusArrivalResponse::Ok(arrival) = response else {
        panic!("expected 200 OK bus arrival response");
    };
    assert_eq!(arrival.bus_stop_code, 83139);
    assert!(arrival.services.is_empty());
    Ok(())
}

# library API: no reqwest, ureq, hyper, or TLS backend
[dependencies]
satay-runtime = { version = "0.1.2", default-features = false }
nutype = { version = "0.7", features = ["serde", "regex"] }
regex = "1"
serde = { version = "1", features = ["derive"], optional = true }
serde_json = { version = "1", optional = true }
http = "1"