src/devices/tests/v2/devfs_exporter/test.rs

// Copyright 2021 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_test::RealmBuilder;
use fuchsia_driver_test::{DriverTestRealmBuilder, DriverTestRealmInstance};
use {fidl_fuchsia_devfs_test as ft, fidl_fuchsia_driver_test as fdt, fuchsia_async as fasync};

#[fasync::run_singlethreaded(test)]
async fn test_devfs_exporter() -> Result<()> {
    // Create the RealmBuilder.
    let builder = RealmBuilder::new().await?;
    builder.driver_test_realm_setup().await?;
    // Build the Realm.
    let instance = builder.build().await?;
    // Start the DriverTestRealm.
    let args =
        fdt::RealmArgs { root_driver: Some("#meta/root.cm".to_string()), ..Default::default() };
    instance.driver_test_realm_start(args).await?;
    // Connect to our driver.
    let dev = instance.driver_test_realm_connect_to_dev()?;
    let device =
        device_watcher::recursive_wait_and_open::<ft::DeviceMarker>(&dev, "root-device").await?;
    Ok(device.ping().await?)
}