nordisk/holger

holger-estate-front/tests/the_monetize_log_reaches_the_log_door.rs

//! **monetize's log reaches the installer's log door** (owner 2026-09-28).
//!
//! The front embeds monetize-server (feature `metered`), which logs with
//! `eprintln!` — the purchase, the grant, the webhook, every guest's `[guest …]`
//! line — and has no logger. fd 2 of PID 1 is the serial console, which the
//! log door (`cargo xtask estate logs web`) never reads; only the BootLog is
//! read. So the front must take fd 2 into the BootLog
//! (`nordisk_pairing::bootlog::capture_stderr`, the behaviour proven in
//! Skidbladnir's tests/stderr_reaches_the_boot_log.rs) BEFORE monetize or
//! tracing say anything, and hand the tracing Tap the CONSOLE it returns (a Tap
//! over `std::io::stderr()` would now feed the pipe and push every line twice).
//! This holds the wiring in `src/main.rs` to that; the mock run proves the lines.

#[test]
fn the_front_takes_fd_2_into_the_boot_log_before_anything_logs() {
    let main =
        std::fs::read_to_string(concat!(env!("CARGO_MANIFEST_DIR"), "/src/main.rs")).unwrap();
    let code: String = main
        .lines()
        .filter(|l| !l.trim_start().starts_with("//"))
        .collect::<Vec<_>>()
        .join("\n");
    // Read with the whitespace out: rustfmt wraps a long call where it likes.
    let code: String = code.split_whitespace().collect();
    let capture = code
        .find("bootlog::capture_stderr(&BOOT_LOG")
        .expect("main.rs takes fd 2 into the BootLog (capture_stderr)");
    let tracing = code
        .find("tracing_subscriber::fmt()")
        .expect("main.rs starts tracing");
    assert!(
        capture < tracing,
        "fd 2 is taken before tracing says anything"
    );
    assert!(!code.contains("Tap::new(&BOOT_LOG,std::io::stderr())"), "the Tap writes the console capture_stderr returns, never fd 2 (every line would be pushed twice)");
    let manifest =
        std::fs::read_to_string(concat!(env!("CARGO_MANIFEST_DIR"), "/Cargo.toml")).unwrap();
    assert!(
        manifest
            .lines()
            .any(|l| l.starts_with("nordisk-pairing") && l.contains("\"stderr-capture\"")),
        "nordisk-pairing's stderr-capture feature is on"
    );
}