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: bench.rs
    path of file: ./repos/tremor-runtime/src/connectors/tests
    
    the code of the file until where you have to start completion: // Copyright 2022, The Tremor Team
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing perm
use super::ConnectorHarness;
use crate::{
    connectors::{impls::bench, prelude::KillSwitch, sink::SinkMsg},
    errors::Result,
    system::{flow_supervi
    
async fn stop_after_secs() -> Result<()> {
    let _: std::result::Result<_, _> = env_logger::try_init();

    let mut file = NamedTempFile::new()?;
    file.write_all(b"{}\n")?;
    file.write_all(b"\"snot\"\n")?;
    file.write_all(b"\"badger\"\n")?;
    file.flush()?;
    let path = file.into_temp_path();

    let defn = literal!({
      "codec": "string",
      "config": {
        "path": path.display().to_string(),
        "stop_after_secs": 1
      }
    });

    let (tx, mut rx) = crate::channel::bounded(1);
    let kill_switch = KillSwitch::new(tx);
    let mut harness = ConnectorHarness::new_with_kill_switch(
        function_name!(),
        &bench::Builder::default(),
        &defn,
        kill_switch,
    )
    .await?;
    harness.start().await?;
    harness.wait_for_connected().await?;

    // echo pipeline
    let handle = tokio::task::spawn(async move {
        // echo pipeline
        loop {
            let event = match harness.out()?.get_event().await {
                Ok(r) => r,
                Err(e) => return Result::<()>::Err(e),
            };
            if let Err(e) = harness
                .addr
                .send_sink(SinkMsg::Event { event, port: IN })
                .await
            {
                error!("Error sending event to sink: {e}");
            }
        }
    });

    // the bench connector should trigger the kill switch
    let two_secs = Duration::from_secs(2);
    let msg = timeout(two_secs, rx.recv()).await?.expect("failed to recv");
    assert!(matches!(msg, flow_supervisor::Msg::Stop));
    info!("Flow supervisor finished");
    info!("Harness stopped");
    handle.abort(); // stopping the pipeline after the connector to ensure it is draining the source
    info!("Echo pipeline finished");

    Ok(())
}