examples/testing/realm_proxy/src/main.rs

// Copyright 2023 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

use anyhow::Result;
use fuchsia_component::client::{
    connect_to_protocol, connect_to_protocol_at, connect_to_protocol_at_path,
};
use log::info;
use realm_client::{InstalledNamespace, extend_namespace};
use {fidl_fidl_examples_routing_echo as fecho, fidl_test_echoserver as ftest};

async fn create_realm(options: ftest::RealmOptions) -> Result<InstalledNamespace> {
    let realm_factory = connect_to_protocol::<ftest::RealmFactoryMarker>()?;
    let dict_client =
        realm_factory.create_realm(options).await?.map_err(realm_client::Error::OperationError)?;
    let ns = extend_namespace(realm_factory, dict_client).await?;

    Ok(ns)
}

#[fuchsia::test]
async fn test_example() {
    let realm_options = ftest::RealmOptions { ..Default::default() };
    let test_ns = create_realm(realm_options).await.unwrap();

    info!("connected to the test realm!");

    let echo = connect_to_protocol_at::<fecho::EchoMarker>(&test_ns).unwrap();
    let response = echo.echo_string(Some("hello")).await.unwrap().unwrap();
    assert_eq!(response, "hello");

    let echo = connect_to_protocol_at_path::<fecho::EchoMarker>(&format!(
        "{}/reverse-echo",
        test_ns.prefix(),
    ))
    .unwrap();
    let response = echo.echo_string(Some("hello")).await.unwrap().unwrap();
    assert_eq!(response, "olleh");
}