src/test/ui/issues/issue-14456.rs

   1 // run-pass
   2 #![allow(unused_mut)]
   3 // ignore-cloudabi no processes
   4 // ignore-emscripten no processes
   5 // ignore-sgx no processes
   6
   7 use std::env;
   8 use std::io::prelude::*;
   9 use std::io;
  10 use std::process::{Command, Stdio};
  11
  12 fn main() {
  13     let args: Vec<String> = env::args().collect();
  14     if args.len() > 1 && args[1] == "child" {
  15         return child()
  16     }
  17
  18     test();
  19 }
  20
  21 fn child() {
  22     writeln!(&mut io::stdout(), "foo").unwrap();
  23     writeln!(&mut io::stderr(), "bar").unwrap();
  24     let mut stdin = io::stdin();
  25     let mut s = String::new();
  26     stdin.lock().read_line(&mut s).unwrap();
  27     assert_eq!(s.len(), 0);
  28 }
  29
  30 fn test() {
  31     let args: Vec<String> = env::args().collect();
  32     let mut p = Command::new(&args[0]).arg("child")
  33                                      .stdin(Stdio::piped())
  34                                      .stdout(Stdio::piped())
  35                                      .stderr(Stdio::piped())
  36                                      .spawn().unwrap();
  37     assert!(p.wait().unwrap().success());
  38 }