2 #![allow(unused_imports)]
3 #![warn(clippy::explicit_write)]
5 fn stdout() -> String {
9 fn stderr() -> String {
23 write!(std::io::stdout(), "test").unwrap();
24 write!(std::io::stderr(), "test").unwrap();
25 writeln!(std::io::stdout(), "test").unwrap();
26 writeln!(std::io::stderr(), "test").unwrap();
27 std::io::stdout().write_fmt(format_args!("test")).unwrap();
28 std::io::stderr().write_fmt(format_args!("test")).unwrap();
31 writeln!(std::io::stdout(), "test\ntest").unwrap();
32 writeln!(std::io::stderr(), "test\ntest").unwrap();
35 writeln!(std::io::stderr(), "with {}", value).unwrap();
36 writeln!(std::io::stderr(), "with {} {}", 2, value).unwrap();
37 writeln!(std::io::stderr(), "with {value}").unwrap();
38 writeln!(std::io::stderr(), "macro arg {}", one!()).unwrap();
40 // these should not warn, different destination
43 let mut s = String::new();
44 write!(s, "test").unwrap();
45 write!(s, "test").unwrap();
46 writeln!(s, "test").unwrap();
47 writeln!(s, "test").unwrap();
48 s.write_fmt(format_args!("test")).unwrap();
49 s.write_fmt(format_args!("test")).unwrap();
50 write!(stdout(), "test").unwrap();
51 write!(stderr(), "test").unwrap();
52 writeln!(stdout(), "test").unwrap();
53 writeln!(stderr(), "test").unwrap();
54 stdout().write_fmt(format_args!("test")).unwrap();
55 stderr().write_fmt(format_args!("test")).unwrap();
57 // these should not warn, no unwrap
60 std::io::stdout().write_fmt(format_args!("test")).expect("no stdout");
61 std::io::stderr().write_fmt(format_args!("test")).expect("no stderr");