honey-biscuit-workshop/workshop-engine/tests/engine_integration.rs

//! Integration tests for workshop-engine
//!
//! These tests execute real commands and verify results.
//! Run with: cargo test --test engine_integration -p workshop-engine
//!
//! Note: These are TRUE integration tests - they run in a separate test binary
//! and execute actual commands on the system.

use std::collections::HashMap;
use std::path::PathBuf;
use std::time::Duration;
use workshop_engine::{Engine, ExecutionContext};

fn create_executor() -> Engine {
    Engine::new()
}

fn create_context() -> ExecutionContext {
    ExecutionContext {
        task_id: "test-integration-1".to_string(),
        pipeline_name: "test-pipeline".to_string(),
        username: "testuser".to_string(),
        working_dir: std::env::temp_dir(),
        env_vars: HashMap::new(),
        timeout: Some(Duration::from_secs(30)),
        shell: "bash".to_string(),
        dry_run: false,
        privileged: false,
        standalone: false,
    }
}

#[tokio::test]
async fn test_execute_echo_outputs_correct_message() {
    let executor = create_executor();
    let ctx = create_context();

    use tokio::process::Command;
    let mut cmd = Command::new("echo");
    cmd.arg("hello world");

    let result = executor.execute(cmd, &ctx, &None).await.unwrap();

    assert!(result.success);
    assert_eq!(result.exit_code, 0);
    assert!(result.stdout.contains("hello world"));
    assert!(result.stderr.is_empty());
}

#[tokio::test]
async fn test_execute_true_returns_zero_exit_code() {
    let executor = create_executor();
    let ctx = create_context();

    use tokio::process::Command;
    let cmd = Command::new("true");

    let result = executor.execute(cmd, &ctx, &None).await.unwrap();

    assert!(result.success);
    assert_eq!(result.exit_code, 0);
}

#[tokio::test]
async fn test_execute_false_returns_nonzero_exit_code() {
    let executor = create_executor();
    let ctx = create_context();

    use tokio::process::Command;
    let cmd = Command::new("false");

    let result = executor.execute(cmd, &ctx, &None).await;

    assert!(result.is_err());
    // assert!(!result.success);
    // assert_ne!(result.exit_code, 0);
}

#[tokio::test]
async fn test_execute_ls_lists_directory() {
    let executor = create_executor();
    let ctx = create_context();

    use tokio::process::Command;
    let mut cmd = Command::new("ls");
    cmd.arg("-la");
    cmd.arg("/tmp");

    let result = executor.execute(cmd, &ctx, &None).await.unwrap();

    assert!(result.success);
}

#[tokio::test]
async fn test_execute_date_command() {
    let executor = create_executor();
    let ctx = create_context();

    use tokio::process::Command;
    let cmd = Command::new("date");

    let result = executor.execute(cmd, &ctx, &None).await.unwrap();

    assert!(result.success);
    assert!(!result.stdout.trim().is_empty());
}

#[tokio::test]
async fn test_execute_invalid_command_returns_error() {
    let executor = create_executor();
    let ctx = create_context();

    use tokio::process::Command;
    let cmd = Command::new("this_command_definitely_does_not_exist_12345");

    let result = executor.execute(cmd, &ctx, &None).await;

    assert!(result.is_err());
}

#[tokio::test]
async fn test_execute_passes_custom_env_var() {
    let executor = create_executor();
    let mut ctx = create_context();
    ctx.env_vars
        .insert("MY_CUSTOM_VAR".to_string(), "my_value_123".to_string());

    use tokio::process::Command;
    let cmd = Command::new("env");

    let result = executor.execute(cmd, &ctx, &None).await.unwrap();

    assert!(result.stdout.contains("MY_CUSTOM_VAR=my_value_123"));
}

#[tokio::test]
async fn test_execute_sets_ws_taskid() {
    let executor = create_executor();
    let mut ctx = create_context();
    ctx.task_id = "task-abc-123".to_string();
    ctx.pipeline_name = "pipeline-xyz".to_string();

    use tokio::process::Command;
    let cmd = Command::new("env");

    let result = executor.execute(cmd, &ctx, &None).await.unwrap();

    assert!(result.stdout.contains("HBW_TASKID=task-abc-123"));
    assert!(result.stdout.contains("HBW_PIPELINE=pipeline-xyz"));
}

#[tokio::test]
async fn test_execute_sets_ws_user_info() {
    let executor = create_executor();
    let ctx = create_context();

    use tokio::process::Command;
    let cmd = Command::new("env");

    let result = executor.execute(cmd, &ctx, &None).await.unwrap();

    assert!(result.stdout.contains("HBW_USERNAME=testuser"));
}

#[tokio::test]
async fn test_execute_respects_working_directory() {
    let executor = create_executor();
    let ctx = ExecutionContext {
        task_id: "test-context-1".to_string(),
        pipeline_name: "test-pipeline".to_string(),
        username: "testuser".to_string(),
        working_dir: PathBuf::from("/tmp"),
        env_vars: HashMap::new(),
        timeout: Some(Duration::from_secs(30)),
        shell: "bash".to_string(),
        standalone: false,
        ..Default::default()
    };

    use tokio::process::Command;
    let cmd = Command::new("pwd");

    let result = executor.execute(cmd, &ctx, &None).await.unwrap();

    assert!(result.success);
    let trimmed = result.stdout.trim();
    assert!(trimmed == "/tmp" || trimmed.ends_with("tmp"));
}

#[tokio::test]
async fn test_execute_captures_stderr() {
    let executor = create_executor();
    let ctx = create_context();

    use tokio::process::Command;
    let mut cmd = Command::new("bash");
    cmd.arg("-c");
    cmd.arg("echo error >&2");

    let result = executor.execute(cmd, &ctx, &None).await.unwrap();

    assert!(result.success);
    assert!(result.stderr.contains("error"));
}

/// Test: with `process_group(0)`, kill() propagates to the entire process tree.
///
/// We spawn a bash that creates a background sleep. With process_group(0),
/// bash is the process group leader. When we kill(-PGID), the sleep should die too.
///
/// This test uses tokio::process::Command + process_group(0) directly
/// (bypassing Engine) to verify the kernel-level behavior.
#[tokio::test]
async fn test_process_group_kill_kills_subprocesses() {
    use std::os::unix::process::CommandExt;
    use std::process::Stdio;
    use tokio::io::AsyncBufReadExt;
    use tokio::process::Command;

    let mut cmd = Command::new("bash");
    cmd.args(["-c", "sleep 999 & echo $!"]);
    cmd.process_group(0);
    cmd.stdin(Stdio::null());
    cmd.stdout(Stdio::piped());
    cmd.stderr(Stdio::piped());

    let mut child = cmd.spawn().expect("spawn failed");
    let bash_pid = child.id().expect("no pid");
    eprintln!("[test] bash PID: {}", bash_pid);

    // Read the background sleep's PID from stdout
    let stdout = child.stdout.take().expect("stdout pipe");
    let mut reader = tokio::io::BufReader::new(stdout);
    let mut pid_line = String::new();
    reader
        .read_line(&mut pid_line)
        .await
        .expect("read pid line");
    let sleep_pid: u32 = pid_line.trim().parse().expect("valid sleep PID");
    eprintln!("[test] sleep PID: {}", sleep_pid);

    // Verify sleep is alive before kill
    let alive_before = std::path::Path::new(&format!("/proc/{}", sleep_pid)).exists();
    eprintln!("[test] sleep alive before kill: {}", alive_before);

    // Kill by sending SIGKILL to the NEGATIVE PGID (entire process group)
    unsafe {
        libc::kill(-(bash_pid as i32), libc::SIGKILL);
    }
    child.wait().await.expect("wait failed");
    eprintln!("[test] kill+wait done");

    tokio::time::sleep(std::time::Duration::from_millis(300)).await;

    // Check if sleep survived — it SHOULD be dead now
    let alive_after = std::path::Path::new(&format!("/proc/{}", sleep_pid)).exists();
    eprintln!("[test] sleep alive after kill: {}", alive_after);

    // Cleanup just in case
    let _ = std::process::Command::new("kill")
        .arg("-9")
        .arg(sleep_pid.to_string())
        .spawn();

    assert!(alive_before, "Test setup: sleep was never created");
    assert!(
        !alive_after,
        "sleep survived process-group kill! process_group(0) fix did not work."
    );
}