forkguard 0.1.3

if guard.detected_fork() { ... }
Documentation 
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#[test]
fn test_noop_guard() {
    let mut guard = forkguard::noop::Guard::default();
    assert!(!guard.detected_fork());

    #[cfg(unix)]
    {
        let pid = unsafe { libc::fork() };
        if pid == 0 {
            if guard.detected_fork() {
                std::process::exit(1);
            }
            std::process::exit(0);
        } else if pid > 0 {
            let mut status = 0;
            unsafe { libc::waitpid(pid, &mut status, 0) };
            assert!(libc::WIFEXITED(status));
            assert_eq!(libc::WEXITSTATUS(status), 0);
            assert!(!guard.detected_fork());
        }
    }
}