1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 use std::io::{ChanReader, ChanWriter};
12 use std::task::TaskBuilder;
15 let (tx, rx) = channel();
16 let mut reader = ChanReader::new(rx);
17 let stderr = ChanWriter::new(tx);
19 let res = TaskBuilder::new().stderr(box stderr as Box<Writer + Send>).try(proc() -> () {
20 fail!("Hello, world!")
22 assert!(res.is_err());
24 let output = reader.read_to_string().unwrap();
25 assert!(output.as_slice().contains("Hello, world!"));