vendor/env_logger/tests/init-twice-retains-filter.rs

   1 extern crate env_logger;
   2 extern crate log;
   3
   4 use std::env;
   5 use std::process;
   6 use std::str;
   7
   8 fn main() {
   9     if env::var("YOU_ARE_TESTING_NOW").is_ok() {
  10         // Init from the env (which should set the max level to `Debug`)
  11         env_logger::init();
  12
  13         assert_eq!(log::LevelFilter::Debug, log::max_level());
  14
  15         // Init again using a different max level
  16         // This shouldn't clobber the level that was previously set
  17         env_logger::Builder::new()
  18             .parse_filters("info")
  19             .try_init()
  20             .unwrap_err();
  21
  22         assert_eq!(log::LevelFilter::Debug, log::max_level());
  23         return;
  24     }
  25
  26     let exe = env::current_exe().unwrap();
  27     let out = process::Command::new(exe)
  28         .env("YOU_ARE_TESTING_NOW", "1")
  29         .env("RUST_LOG", "debug")
  30         .output()
  31         .unwrap_or_else(|e| panic!("Unable to start child process: {}", e));
  32     if out.status.success() {
  33         return;
  34     }
  35
  36     println!("test failed: {}", out.status);
  37     println!("--- stdout\n{}", str::from_utf8(&out.stdout).unwrap());
  38     println!("--- stderr\n{}", str::from_utf8(&out.stderr).unwrap());
  39     process::exit(1);
  40 }