actix-website/examples/testing/src/integration_one.rs

use actix_web::{HttpRequest, Responder};

#[allow(dead_code)]
async fn index(_req: HttpRequest) -> impl Responder {
    "Hello world!"
}

// <integration-one>
#[cfg(test)]
mod tests {
    use super::*;
    use actix_web::{test, web, App};

    #[actix_rt::test]
    async fn test_index_get() {
        let mut app = test::init_service(App::new().route("/", web::get().to(index))).await;
        let req = test::TestRequest::with_header("content-type", "text/plain").to_request();
        let resp = test::call_service(&mut app, req).await;
        assert!(resp.status().is_success());
    }

    #[actix_rt::test]
    async fn test_index_post() {
        let mut app = test::init_service(App::new().route("/", web::get().to(index))).await;
        let req = test::TestRequest::post().uri("/").to_request();
        let resp = test::call_service(&mut app, req).await;
        assert!(resp.status().is_client_error());
    }
}
// </integration-one>