src/sys/component_manager/tests/elf_runner_test.rs

// Copyright 2019 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 {
    fdio,
    fidl_fuchsia_sys::FileDescriptor,
    fuchsia_async as fasync,
    fuchsia_component::client::{self, LaunchOptions},
    fuchsia_runtime::HandleType,
    std::io::{BufRead, BufReader},
};

fn main() {
    test(
        "fuchsia-pkg://fuchsia.com/elf_runner_test#meta/echo_args.cm".to_string(),
        "/pkg/bin/echo_args Hippos rule!\n".to_string(),
    );
    test(
        "fuchsia-pkg://fuchsia.com/elf_runner_test#meta/echo_no_args.cm".to_string(),
        "/pkg/bin/echo_args\n".to_string(),
    );
}

fn test(url: String, expected_output: String) {
    let mut _executor = fasync::Executor::new().expect("error creating executor");
    let launcher = client::launcher().expect("failed to connect to launcher");
    let (pipe_handle, socket_handle) = fdio::pipe_half().expect("failed to create pipe");
    let mut options = LaunchOptions::new();
    options.set_out(FileDescriptor {
        type0: HandleType::FileDescriptor as i32,
        type1: 0,
        type2: 0,
        handle0: Some(socket_handle.into()),
        handle1: None,
        handle2: None,
    });

    let _app = client::launch_with_options(
        &launcher,
        "fuchsia-pkg://fuchsia.com/elf_runner_test#meta/component_manager.cmx".to_string(),
        Some(vec![url]),
        options,
    )
    .expect("component manager failed to launch");

    let mut reader = BufReader::new(pipe_handle);
    let mut line = String::new();
    reader.read_line(&mut line).expect("failed to read echo_args output");
    assert_eq!(line, expected_output);
}