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| author | Kivooeo <Kivooeo123@gmail.com> | 2025-07-01 23:33:59 +0500 |
|---|---|---|
| committer | Kivooeo <Kivooeo123@gmail.com> | 2025-07-01 23:33:59 +0500 |
| commit | 1fb5e0149fb85af0e49fa40329cbc352b4cba861 (patch) | |
| tree | 99717c06e20c4557a9e4d756a13bbf88d8093966 /tests/ui/write-fmt-errors.rs | |
| parent | f46ce66fcc3d6058f90ac5bf0930f940f1e7b0ca (diff) | |
| download | rust-1fb5e0149fb85af0e49fa40329cbc352b4cba861.tar.gz rust-1fb5e0149fb85af0e49fa40329cbc352b4cba861.zip | |
moved tests
Diffstat (limited to 'tests/ui/write-fmt-errors.rs')
| -rw-r--r-- | tests/ui/write-fmt-errors.rs | 55 |
1 files changed, 0 insertions, 55 deletions
diff --git a/tests/ui/write-fmt-errors.rs b/tests/ui/write-fmt-errors.rs deleted file mode 100644 index b48fa3f11cc..00000000000 --- a/tests/ui/write-fmt-errors.rs +++ /dev/null @@ -1,55 +0,0 @@ -//@ run-pass -//@ needs-unwind - -#![feature(io_error_uncategorized)] - -use std::fmt; -use std::io::{self, Error, Write}; -use std::panic::catch_unwind; - -struct ErrorDisplay; - -impl fmt::Display for ErrorDisplay { - fn fmt(&self, _: &mut fmt::Formatter) -> fmt::Result { - Err(fmt::Error) - } -} - -struct ErrorWriter; - -const WRITER_ERROR: io::ErrorKind = io::ErrorKind::NotConnected; - -impl Write for ErrorWriter { - fn write(&mut self, _buf: &[u8]) -> io::Result<usize> { - Err(Error::new(WRITER_ERROR, "not connected")) - } - - fn flush(&mut self) -> io::Result<()> { Ok(()) } -} - -fn main() { - // Test that an underlying error is propagated - let res = write!(ErrorWriter, "abc"); - assert!(res.is_err(), "writer error did not propagate"); - - // Test that the error from the formatter is detected. - let res = catch_unwind(|| write!(vec![], "{} {} {}", 1, ErrorDisplay, "bar")); - let err = res.expect_err("formatter error did not lead to panic").downcast::<&str>().unwrap(); - assert!( - err.contains("formatting trait implementation returned an error"), - "unexpected panic: {}", err - ); - - // Writer error when there's some string before the first `{}` - let res = write!(ErrorWriter, "abc {}", ErrorDisplay); - assert!(res.is_err(), "writer error did not propagate"); - assert_eq!(res.unwrap_err().kind(), WRITER_ERROR); - - // Formatter error when the `{}` comes first - let res = catch_unwind(|| write!(ErrorWriter, "{} abc", ErrorDisplay)); - let err = res.expect_err("formatter error did not lead to panic").downcast::<&str>().unwrap(); - assert!( - err.contains("formatting trait implementation returned an error"), - "unexpected panic: {}", err - ); -} |
