vendor/env_logger/tests/log-in-log.rs

   1 #[macro_use]
   2 extern crate log;
   3 extern crate env_logger;
   4
   5 use std::env;
   6 use std::fmt;
   7 use std::process;
   8 use std::str;
   9
  10 struct Foo;
  11
  12 impl fmt::Display for Foo {
  13     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  14         info!("test");
  15         f.write_str("bar")
  16     }
  17 }
  18
  19 fn main() {
  20     env_logger::init();
  21     if env::var("YOU_ARE_TESTING_NOW").is_ok() {
  22         return info!("{}", Foo);
  23     }
  24
  25     let exe = env::current_exe().unwrap();
  26     let out = process::Command::new(exe)
  27         .env("YOU_ARE_TESTING_NOW", "1")
  28         .env("RUST_LOG", "debug")
  29         .output()
  30         .unwrap_or_else(|e| panic!("Unable to start child process: {}", e));
  31     if out.status.success() {
  32         return;
  33     }
  34
  35     println!("test failed: {}", out.status);
  36     println!("--- stdout\n{}", str::from_utf8(&out.stdout).unwrap());
  37     println!("--- stderr\n{}", str::from_utf8(&out.stderr).unwrap());
  38     process::exit(1);
  39 }