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: simultaneous-connections.rs
    path of file: ./repos/bonsaidb/crates/bonsaidb/tests
    
    the code of the file until where you have to start completion: //! Tests a single server with multiple simultaneous connections.

use bonsaidb::client::url::Url;
use bonsaidb::client::AsyncClient;
use bonsaidb::core::connection::AsyncStorageConnection;
use bonsaidb::core::test_util::{self, BasicSchema, TestDirectory};
use bonsaidb::local::config::Builder;
use bonsaidb::server::{DefaultPermissions, Server, ServerConfiguration};

#[tokio::test]
async fn simultaneous_connecti
    
async fn simultaneous_connections() -> anyhow::Result<()> {
    let dir = TestDirectory::new("simultaneous-connections.bonsaidb");
    let server = Server::open(
        ServerConfiguration::new(&dir)
            .default_permissions(DefaultPermissions::AllowAll)
            .with_schema::<BasicSchema>()?,
    )
    .await?;
    server.install_self_signed_certificate(false).await?;
    let certificate = server
        .certificate_chain()
        .await?
        .into_end_entity_certificate();
    tokio::spawn(async move { server.listen_on(12345).await });

    let client = AsyncClient::build(Url::parse("bonsaidb://localhost:12345")?)
        .with_certificate(certificate)
        .build()?;

    let mut tasks = Vec::new();
    for i in 0usize..10 {
        tasks.push(test_one_client(client.clone(), format!("test{i}")));
    }

    futures::future::join_all(tasks)
        .await
        .into_iter()
        .collect::<Result<Vec<()>, anyhow::Error>>()?;
    Ok(())
}