src/test/ui/env-home-dir.rs

// run-pass

#![allow(unused_variables)]
#![allow(deprecated)]
// ignore-cloudabi no environment variables present
// ignore-emscripten env vars don't work?
// ignore-sgx env vars cannot be modified

use std::env::*;
use std::path::PathBuf;

#[cfg(unix)]
fn main() {
    let oldhome = var("HOME");

    set_var("HOME", "/home/MountainView");
    assert_eq!(home_dir(), Some(PathBuf::from("/home/MountainView")));

    remove_var("HOME");
    if cfg!(target_os = "android") {
        assert!(home_dir().is_none());
    } else {
        // When HOME is not set, some platforms return `None`,
        // but others return `Some` with a default.
        // Just check that it is not "/home/MountainView".
        assert_ne!(home_dir(), Some(PathBuf::from("/home/MountainView")));
    }
}

#[cfg(windows)]
fn main() {
    let oldhome = var("HOME");
    let olduserprofile = var("USERPROFILE");

    remove_var("HOME");
    remove_var("USERPROFILE");

    assert!(home_dir().is_some());

    set_var("HOME", "/home/MountainView");
    assert_eq!(home_dir(), Some(PathBuf::from("/home/MountainView")));

    remove_var("HOME");

    set_var("USERPROFILE", "/home/MountainView");
    assert_eq!(home_dir(), Some(PathBuf::from("/home/MountainView")));

    set_var("HOME", "/home/MountainView");
    set_var("USERPROFILE", "/home/PaloAlto");
    assert_eq!(home_dir(), Some(PathBuf::from("/home/MountainView")));
}