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: tests.rs
    path of file: ./repos/mCaptcha/db/db-sqlx-postgres/src
    
    the code of the file until where you have to start completion: // Copyright (C) 2022  Aravinth Manivannan <realaravinth@batsense.net>
// SPDX-FileCopyrightText: 2023 Aravinth Manivannan <realaravinth@batsense.net>
//
// SPDX-L
    
async fn everyting_works() {
    const EMAIL: &str = "postgresuser@foo.com";
    const NAME: &str = "postgresuser";
    const PASSWORD: &str = "pasdfasdfasdfadf";
    const SECRET1: &str = "postgressecret1";
    // captcha config
    const CAPTCHA_SECRET: &str = "postgrescaptchasecret";
    const CAPTCHA_DESCRIPTION: &str = "postgrescaptchadescription";
    const CAPTCHA_DURATION: i32 = 30;
    // notification config
    const HEADING: &str = "testing notifications get db postgres";
    const MESSAGE: &str = "testing notifications get message db postgres";

    const ADD_NOTIFICATION: AddNotification = AddNotification {
        from: NAME,
        to: NAME,
        message: MESSAGE,
        heading: HEADING,
    };

    let url = env::var("POSTGRES_DATABASE_URL").unwrap();

    let mut parsed = Url::parse(&url).unwrap();
    parsed.set_path("db_postgres_test");
    let url = parsed.to_string();

    if sqlx::Postgres::database_exists(&url).await.unwrap() {
        sqlx::Postgres::drop_database(&url).await.unwrap();
    }
    sqlx::Postgres::create_database(&url).await.unwrap();

    let pool_options = PgPoolOptions::new().max_connections(2);
    let connection_options = ConnectionOptions::Fresh(Fresh {
        pool_options,
        url: url.clone(),
        disable_logging: false,
    });
    let db = connection_options.connect().await.unwrap();

    db.migrate().await.unwrap();
    let p = Register {
        username: NAME,
        email: Some(EMAIL),
        hash: PASSWORD,
        secret: SECRET1,
    };

    let c = CreateCaptcha {
        duration: CAPTCHA_DURATION,
        key: CAPTCHA_SECRET,
        description: CAPTCHA_DESCRIPTION,
    };
    database_works(&db, &p, &c, &LEVELS, &TRAFFIC_PATTERN, &ADD_NOTIFICATION).await;
    drop(db);
    sqlx::Postgres::drop_database(&url).await.unwrap();
}