vendor/env_logger-0.6.2/tests/regexp_filter.rs

   1 #[macro_use] extern crate log;
   2 extern crate env_logger;
   3
   4 use std::process;
   5 use std::env;
   6 use std::str;
   7
   8 fn main() {
   9     if env::var("LOG_REGEXP_TEST").ok() == Some(String::from("1")) {
  10         child_main();
  11     } else {
  12         parent_main()
  13     }
  14 }
  15
  16 fn child_main() {
  17     env_logger::init();
  18     info!("XYZ Message");
  19 }
  20
  21 fn run_child(rust_log: String) -> bool {
  22     let exe = env::current_exe().unwrap();
  23     let out = process::Command::new(exe)
  24         .env("LOG_REGEXP_TEST", "1")
  25         .env("RUST_LOG", rust_log)
  26         .output()
  27         .unwrap_or_else(|e| panic!("Unable to start child process: {}", e));
  28     str::from_utf8(out.stderr.as_ref()).unwrap().contains("XYZ Message")
  29 }
  30
  31 fn assert_message_printed(rust_log: &str) {
  32     if !run_child(rust_log.to_string()) {
  33         panic!("RUST_LOG={} should allow the test log message", rust_log)
  34     }
  35 }
  36
  37 fn assert_message_not_printed(rust_log: &str) {
  38     if run_child(rust_log.to_string()) {
  39         panic!("RUST_LOG={} should not allow the test log message", rust_log)
  40     }
  41 }
  42
  43 fn parent_main() {
  44     // test normal log severity levels
  45     assert_message_printed("info");
  46     assert_message_not_printed("warn");
  47
  48     // test of regular expression filters
  49     assert_message_printed("info/XYZ");
  50     assert_message_not_printed("info/XXX");
  51 }