// This file is part of Substrate.

// Copyright (C) 2020-2021 Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

#![cfg(unix)]
use assert_cmd::cargo::cargo_bin;
use nix::{
    sys::signal::{
        kill,
        Signal::{self, SIGINT, SIGTERM},
    },
    unistd::Pid,
};
use std::{convert::TryInto, process::Command};
use tempfile::tempdir;

pub mod common;

#[tokio::test]
async fn running_the_node_works_and_can_be_interrupted() {
    async fn run_command_and_kill(signal: Signal) {
        let base_path = tempdir().expect("could not create a temp dir");
        let mut cmd = common::KillChildOnDrop(
            Command::new(cargo_bin("deeper-chain"))
                .args(&["--dev", "-d"])
                .arg(base_path.path())
                .spawn()
                .unwrap(),
        );

        common::wait_n_finalized_blocks(3, 50).await.unwrap();
        assert!(
            cmd.try_wait().unwrap().is_none(),
            "the process should still be running"
        );
        kill(Pid::from_raw(cmd.id().try_into().unwrap()), signal).unwrap();
        assert_eq!(
            common::wait_for(&mut cmd, 30).map(|x| x.success()),
            Some(true),
            "the process must exit gracefully after signal {}",
            signal,
        );
    }

    run_command_and_kill(SIGINT).await;
    run_command_and_kill(SIGTERM).await;
}
