You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: test.rs
    path of file: ./repos/examples/databases/mongodb/src
    
    the code of the file until where you have to start completion: use actix_web::{
    test::{call_and_read_body, call_and_read_body_json, init_service, TestRequest},
    web::Bytes,
};

use super::*;

#[actix_web::test]
#[ignore = "requires MongoDB instance running"]
async fn test() {
    let uri = std::env::var("MONGODB_URI").unwrap_or_else(|_| "mongodb://localhost:27017".into());

    let client = Client::with_uri_str(uri).await.expect("failed to connect");

    // Clear any data currently in the users collection.
    client
        .database(DB_NAME)
        .collection::<User>(COLL_NAME)
        .drop(None)
        .await
        .expect("drop collection should succeed");

    let app = init_service(
        App::new()
            .app_data(web::Data::new(client))
            .service(add_user)
            .service(get_user),
    )
    .await;

    let user = User {
        first_name: "Jane".into(),
        last_name: "Doe".int
    
async fn test() {
    let uri = std::env::var("MONGODB_URI").unwrap_or_else(|_| "mongodb://localhost:27017".into());

    let client = Client::with_uri_str(uri).await.expect("failed to connect");

    // Clear any data currently in the users collection.
    client
        .database(DB_NAME)
        .collection::<User>(COLL_NAME)
        .drop(None)
        .await
        .expect("drop collection should succeed");

    let app = init_service(
        App::new()
            .app_data(web::Data::new(client))
            .service(add_user)
            .service(get_user),
    )
    .await;

    let user = User {
        first_name: "Jane".into(),
        last_name: "Doe".into(),
        username: "janedoe".into(),
        email: "example@example.com".into(),
    };

    let req = TestRequest::post()
        .uri("/add_user")
        .set_form(&user)
        .to_request();

    let response = call_and_read_body(&app, req).await;
    assert_eq!(response, Bytes::from_static(b"user added"));

    let req = TestRequest::get()
        .uri(&format!("/get_user/{}", &user.username))
        .to_request();

    let response: User = call_and_read_body_json(&app, req).await;
    assert_eq!(response, user);
}