smith

//! Guest build respects target-generic CPU defaults (`SMH-SPEC-WASM0001`, `SMH-SPEC-SPEC0001`).

use std::{fs, path::PathBuf, time::Duration};

#[test]
fn e2e_guest_build_ignores_inherited_native_cpu_flags_without_changing_lockfile() {
    let root = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("..");
    let lockfile = root.join("Cargo.lock");
    let lock_before = fs::read(&lockfile).unwrap();
    let scratch = Scratch(std::env::temp_dir().join(format!(
        "smith-dependency-guest-build-{}",
        std::process::id()
    )));
    fs::create_dir_all(&scratch.0).unwrap();

    let output = assert_cmd::Command::new("cargo")
        .current_dir(&root)
        .env_remove("RUSTFLAGS")
        .env_remove("CARGO_ENCODED_RUSTFLAGS")
        .args([
            "build",
            "--locked",
            "--offline",
            "--target",
            "wasm32-wasip2",
            "-p",
            "smith-plugin-echo",
            "--config",
            "build.rustflags=[\"-C\",\"target-cpu=native\"]",
            "--target-dir",
        ])
        .arg(&scratch.0)
        .timeout(Duration::from_secs(120))
        .output()
        .unwrap();
    let stderr = String::from_utf8_lossy(&output.stderr);
    assert!(output.status.success(), "cargo build failed:\n{stderr}");
    assert!(
        !stderr.contains("not a recognized processor")
            && !stderr.contains("not a recognized feature"),
        "guest build inherited native CPU flags:\n{stderr}"
    );
    assert_eq!(fs::read(lockfile).unwrap(), lock_before);
}

struct Scratch(PathBuf);

impl Drop for Scratch {
    fn drop(&mut self) {
        fs::remove_dir_all(&self.0).unwrap();
    }
}