tests/ui/explicit_write.fixed

   1 // run-rustfix
   2 #![allow(unused_imports)]
   3 #![warn(clippy::explicit_write)]
   4
   5 fn stdout() -> String {
   6     String::new()
   7 }
   8
   9 fn stderr() -> String {
  10     String::new()
  11 }
  12
  13 fn main() {
  14     // these should warn
  15     {
  16         use std::io::Write;
  17         print!("test");
  18         eprint!("test");
  19         println!("test");
  20         eprintln!("test");
  21         print!("test");
  22         eprint!("test");
  23
  24         // including newlines
  25         println!("test\ntest");
  26         eprintln!("test\ntest");
  27     }
  28     // these should not warn, different destination
  29     {
  30         use std::fmt::Write;
  31         let mut s = String::new();
  32         write!(s, "test").unwrap();
  33         write!(s, "test").unwrap();
  34         writeln!(s, "test").unwrap();
  35         writeln!(s, "test").unwrap();
  36         s.write_fmt(format_args!("test")).unwrap();
  37         s.write_fmt(format_args!("test")).unwrap();
  38         write!(stdout(), "test").unwrap();
  39         write!(stderr(), "test").unwrap();
  40         writeln!(stdout(), "test").unwrap();
  41         writeln!(stderr(), "test").unwrap();
  42         stdout().write_fmt(format_args!("test")).unwrap();
  43         stderr().write_fmt(format_args!("test")).unwrap();
  44     }
  45     // these should not warn, no unwrap
  46     {
  47         use std::io::Write;
  48         std::io::stdout().write_fmt(format_args!("test")).expect("no stdout");
  49         std::io::stderr().write_fmt(format_args!("test")).expect("no stderr");
  50     }
  51 }