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/mediasoup/rust/src/router/data_producer
    
    the code of the file until where you have to start completion: use crate::data_producer::DataProducerOptions;
use crate::data_structures::{ListenInfo, Protocol};
use crate::router::{Router, RouterOptions};
use crate::sctp_parameters::SctpStreamParameters;
use crate::transport::Transport;
use crate::webrtc_transport::{
    WebRtcTransport, WebRtcTransportListenInfos, WebRtcTransportOptions,
};
use crate::worker::WorkerSettings;
use crate::worker_manager::WorkerManager;
use futures_lite::future;
use std::env;
use std::net::{IpAddr, Ipv4Addr};

async fn init() -> (Router, WebRtcTransport) {
    {
        let mut builder = env_logger::builder();
        if env::var(env_logger::DEFAULT_FILTER_ENV).is_err() {
            builder.filter_level(log::LevelFilter::Off);
        }
        let _ = builder.is_test(true).try_init();
    }

    let worker_manager = WorkerManager::new();

    let worker = worker_manager
        .create_worker(WorkerSettings::default())
        .await
        .expect("Failed to create worker");

    let router = worker
        .create_router(RouterOptions::default())
        .await
        .expect("Failed to create router");

    let transport1 = router
        .create_webrtc_transport({
            let m
    
async fn init() -> (Router, WebRtcTransport) {
    {
        let mut builder = env_logger::builder();
        if env::var(env_logger::DEFAULT_FILTER_ENV).is_err() {
            builder.filter_level(log::LevelFilter::Off);
        }
        let _ = builder.is_test(true).try_init();
    }

    let worker_manager = WorkerManager::new();

    let worker = worker_manager
        .create_worker(WorkerSettings::default())
        .await
        .expect("Failed to create worker");

    let router = worker
        .create_router(RouterOptions::default())
        .await
        .expect("Failed to create router");

    let transport1 = router
        .create_webrtc_transport({
            let mut transport_options =
                WebRtcTransportOptions::new(WebRtcTransportListenInfos::new(ListenInfo {
                    protocol: Protocol::Udp,
                    ip: IpAddr::V4(Ipv4Addr::LOCALHOST),
                    announced_address: None,
                    port: None,
                    flags: None,
                    send_buffer_size: None,
                    recv_buffer_size: None,
                }));

            transport_options.enable_sctp = true;

            transport_options
        })
        .await
        .expect("Failed to create transport1");

    (router, transport1)
}