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[rustc.git] / src / test / run-pass / rust-log-filter.rs
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.
4 //
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.
10
11 // exec-env:RUST_LOG=rust_log_filter/foo
12 // ignore-emscripten no threads support
13
14 #![allow(unknown_features)]
15 #![feature(box_syntax, std_misc, rustc_private)]
16
17 #[macro_use]
18 extern crate log;
19
20 use std::sync::mpsc::{channel, Sender, Receiver};
21 use std::thread;
22
23 pub struct ChannelLogger {
24 tx: Sender<String>
25 }
26
27 impl ChannelLogger {
28 pub fn new() -> (Box<ChannelLogger>, Receiver<String>) {
29 let (tx, rx) = channel();
30 (box ChannelLogger { tx: tx }, rx)
31 }
32 }
33
34 impl log::Logger for ChannelLogger {
35 fn log(&mut self, record: &log::LogRecord) {
36 self.tx.send(format!("{}", record.args)).unwrap();
37 }
38 }
39
40 pub fn main() {
41 let (logger, rx) = ChannelLogger::new();
42
43 let t = thread::spawn(move|| {
44 log::set_logger(logger);
45
46 info!("foo");
47 info!("bar");
48 info!("foo bar");
49 info!("bar foo");
50 });
51
52 assert_eq!(rx.recv().unwrap(), "foo");
53 assert_eq!(rx.recv().unwrap(), "foo bar");
54 assert_eq!(rx.recv().unwrap(), "bar foo");
55 assert!(rx.recv().is_err());
56
57 t.join();
58 }