src/test/run-pass/process/process-spawn-with-unicode-params.rs

   1 // run-pass
   2 // no-prefer-dynamic
   3
   4 // The test copies itself into a subdirectory with a non-ASCII name and then
   5 // runs it as a child process within the subdirectory.  The parent process
   6 // also adds an environment variable and an argument, both containing
   7 // non-ASCII characters.  The child process ensures all the strings are
   8 // intact.
   9
  10 // ignore-cloudabi no processes
  11 // ignore-emscripten no processes
  12 // ignore-sgx no processes
  13
  14 use std::io::prelude::*;
  15 use std::io;
  16 use std::fs;
  17 use std::process::Command;
  18 use std::env;
  19 use std::path::Path;
  20
  21 fn main() {
  22     let my_args = env::args().collect::<Vec<_>>();
  23     let my_cwd  = env::current_dir().unwrap();
  24     let my_env  = env::vars().collect::<Vec<_>>();
  25     let my_path = env::current_exe().unwrap();
  26     let my_dir  = my_path.parent().unwrap();
  27     let my_ext  = my_path.extension().and_then(|s| s.to_str()).unwrap_or("");
  28
  29     // some non-ASCII characters
  30     let blah       = "\u{3c0}\u{42f}\u{97f3}\u{e6}\u{221e}";
  31
  32     let child_name = "child";
  33     let child_dir  = format!("process-spawn-with-unicode-params-{}", blah);
  34
  35     // parameters sent to child / expected to be received from parent
  36     let arg = blah;
  37     let cwd = my_dir.join(&child_dir);
  38     let env = ("RUST_TEST_PROC_SPAWN_UNICODE".to_string(), blah.to_string());
  39
  40     // am I the parent or the child?
  41     if my_args.len() == 1 {             // parent
  42
  43         let child_filestem = Path::new(child_name);
  44         let child_filename = child_filestem.with_extension(my_ext);
  45         let child_path     = cwd.join(&child_filename);
  46
  47         // make a separate directory for the child
  48         let _ = fs::create_dir(&cwd);
  49         fs::copy(&my_path, &child_path).unwrap();
  50
  51         // run child
  52         let p = Command::new(&child_path)
  53                         .arg(arg)
  54                         .current_dir(&cwd)
  55                         .env(&env.0, &env.1)
  56                         .spawn().unwrap().wait_with_output().unwrap();
  57
  58         // display the output
  59         io::stdout().write_all(&p.stdout).unwrap();
  60         io::stderr().write_all(&p.stderr).unwrap();
  61
  62         // make sure the child succeeded
  63         assert!(p.status.success());
  64
  65     } else {                            // child
  66
  67         // check working directory (don't try to compare with `cwd` here!)
  68         assert!(my_cwd.ends_with(&child_dir));
  69
  70         // check arguments
  71         assert_eq!(&*my_args[1], arg);
  72
  73         // check environment variable
  74         assert!(my_env.contains(&env));
  75
  76     };
  77 }