systemstat 0.2.5

Get system information/statistics in a cross-platform way
Documentation 
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//! This module reexports the OS-specific module that actually implements Platform.
pub mod common;
pub use self::common::*;

#[cfg(windows)]
pub mod windows;
#[cfg(windows)]
pub use self::windows::PlatformImpl;

#[cfg(unix)]
pub mod unix;

#[cfg(any(
    target_os = "freebsd",
    target_os = "openbsd",
    target_os = "netbsd",
    target_vendor = "apple"
))]
pub mod bsd;

#[cfg(target_os = "freebsd")]
pub mod freebsd;
#[cfg(target_os = "freebsd")]
pub use self::freebsd::PlatformImpl;

#[cfg(target_os = "openbsd")]
pub mod openbsd;
#[cfg(target_os = "openbsd")]
pub use self::openbsd::PlatformImpl;

#[cfg(target_os = "netbsd")]
pub mod netbsd;
#[cfg(target_os = "netbsd")]
pub use self::netbsd::PlatformImpl;

#[cfg(target_vendor = "apple")]
pub mod macos;
#[cfg(target_vendor = "apple")]
pub use self::macos::PlatformImpl;

#[cfg(any(target_os = "linux", target_os = "android"))]
pub mod linux;
#[cfg(any(target_os = "linux", target_os = "android"))]
pub use self::linux::PlatformImpl;

#[cfg(any(target_os = "illumos", target_os = "solaris"))]
pub mod illumos;
#[cfg(any(target_os = "illumos", target_os = "solaris"))]
pub use self::illumos::PlatformImpl;

#[cfg(test)]
mod tests {
    use super::*;
    use std::thread;
    use std::time::Duration;

    #[test]
    fn test_cpu_load() {
        let load = PlatformImpl::new().cpu_load().unwrap();
        thread::sleep(Duration::from_millis(300));
        let load = load.done().unwrap();
        assert!(!load.is_empty());
        for cpu in load.iter() {
            let sum = cpu.user + cpu.nice + cpu.system + cpu.interrupt + cpu.idle + cpu.platform.sum();
            assert!(sum > 0.95 && sum < 1.05);
        }
    }

    #[test]
    fn test_cpu_load_aggregate() {
        let cpu = PlatformImpl::new().cpu_load_aggregate().unwrap();
        thread::sleep(Duration::from_millis(300));
        let cpu = cpu.done().unwrap();
        let sum = cpu.user + cpu.nice + cpu.system + cpu.interrupt + cpu.idle + cpu.platform.sum();
        assert!(sum > 0.95 && sum < 1.05);
    }

    #[test]
    fn test_load_average() {
        let load = PlatformImpl::new().load_average().unwrap();
        assert!(load.one > 0.00001 && load.five > 0.00001 && load.fifteen > 0.00001);
    }

    #[test]
    fn test_memory() {
        let mem = PlatformImpl::new().memory().unwrap();
        assert!(mem.free.as_u64() > 1024 && mem.total.as_u64() > 1024);
    }

    #[test]
    fn test_swap() {
        let swap = PlatformImpl::new().swap().unwrap();
        assert!(swap.free <= swap.total);
    }

    #[test]
    fn test_mem_and_swap() {
        let (mem, swap) = PlatformImpl::new().memory_and_swap().unwrap();
        assert!(mem.free.as_u64() > 1024 && mem.total.as_u64() > 1024);
        assert!(swap.free <= swap.total);
    }

    #[test]
    fn test_battery_life() {
        if let Ok(bat) = PlatformImpl::new().battery_life() {
            assert!(bat.remaining_capacity <= 100.0 && bat.remaining_capacity >= 0.0);
        }
    }

    #[test]
    fn test_on_ac_power() {
        PlatformImpl::new().on_ac_power().unwrap();
    }

    #[test]
    fn test_mounts() {
        let mounts = PlatformImpl::new().mounts().unwrap();
        assert!(!mounts.is_empty());
        assert!(mounts.iter().find(|m| m.fs_mounted_on == "/").unwrap().fs_mounted_on == "/");
    }

    #[test]
    fn test_mount_at() {
        // XXX: PathBuf required instead of constant string at least on FreeBSD??
        let mount = PlatformImpl::new().mount_at(std::path::PathBuf::from("/")).unwrap();
        assert!(mount.fs_mounted_on == "/");
    }

    #[test]
    fn test_networks() {
        let networks = PlatformImpl::new().networks().unwrap();
        assert!(!networks.values().find(|n| n.name == "lo" || n.name == "lo0").unwrap().addrs.is_empty());
    }

    #[test]
    fn test_cpu_measurement_is_send() {
        use crate::{DelayedMeasurement, CPULoad};
        #[allow(dead_code)]
        fn take_delayed(dm: DelayedMeasurement<Vec<CPULoad>>) {
            use std::thread;
            thread::spawn(move || dm);
        }
    }

}